109 航空紧固件用什么改性尼龙
紧固件的分工很清晰
航空领域的紧固件分两类。承力紧固件（螺栓、铆钉、高锁螺栓）走钛合金、铝合金、不锈钢——塑料不进这个领域。
非承力紧固件（线束扎带、管路卡箍、导线卡子、衬套、垫圈、护线环）是改性尼龙的主场。这一类件数量极大，单机用量能到几千件，减重和阻燃是主要诉求。
现场还原
去年六月，一家无人机厂的试飞场边，工程师拿出一副用了三百小时的桨叶，叶尖的磨痕肉眼可见，迎风面前缘像被砂纸打磨过。旁边一副两百小时的桨叶，前缘磨得更深，两副桨叶用的料不同，磨的速率差了一倍。
他说了一句桨叶选型的金句，桨叶的寿命不看你飞多少小时，看你的前缘吃了多少沙。沙尘环境的磨粒磨损是桨叶的头号杀手，前缘的保护方案和材料的耐磨等级，决定了这个行业的耗材成本结构，这是用几百小时的实飞数据换来的认知。
扎带是最典型的件
尼龙扎带是航空用量最大的塑料紧固件，走 PA66 或 PA6，要过三个门槛：阻燃 V-2 以上、烟毒达标、低温不脆断。
航空级扎带和民用扎带的差别在两点：一是原材料必须是新料、不能加回收料；二是要有批次可追溯。
低温是关键——机舱外 -55℃ 环境下，普通扎带一折就断，要走增韧牌号。
卡箍和衬套要抗蠕变
管路卡箍长期夹紧管路，承受持续的预紧力。PA66 在持续载荷下会蠕变——1000 小时后夹紧力衰减 20%-30%，管路松动。
解决方向有三条：一是走 PA66-GF30 提高抗蠕变，二是卡箍内衬橡胶提供弹性补偿，三是设计上预留二次紧固的余量。
这三条通常要组合使用。
阻燃烟毒同样适用
紧固件虽然体积小，但数量多，总表面积和总质量都不可忽略，同样要满足 FST 要求。
这里最容易翻车的是扎带——薄壁件阻燃等级天然偏低，普通 PA66 扎带只能到 V-2。
要提等级需要加阻燃剂，但阻燃剂会降低韧性，低温性能又受影响。所以航空扎带通常是薄壁专用阻燃增韧牌号，不能用通用牌号顶替。
可追溯性是隐性门槛
航空件的可追溯性要求远高于工业件。每一批料要有完整的批次号、物性报告、阻燃报告，且要能追溯到原料树脂批次。
这对供应商的要求是：不能用副牌料、不能混批、要能出具完整的质保文件。很多询价最后卡在文件上，而不是价格上——这一点采购方要提前和供应商确认。
延伸判断：紧固件的隐性变量
有三件最容易漏掉的隐性变量。一是安装工具的匹配——扎带枪的拉力设定和扎带规格要匹配，拉力过大直接拉断，过小会松脱。
二是与管路材料的相容——某些增塑剂迁移会加速 PA 老化，卡箍和管路要做接触老化验证。三是库存期——PA 扎带长期存放会失水变脆，库房要控制湿度，开封后建议 12 个月内用完。
深一层：几个数字的来历
桨叶的工况是高频疲劳加气动载荷，转速几千转每分钟，每分钟几万次的循环载荷，疲劳是设计的主轴。
桨叶的疲劳失效模式是裂纹从前缘或根部萌生，扩展速度快，失效前的征兆短，所以桨叶的寿命管理按小时强制更换，寿命管理的精度建立在疲劳数据的置信度上，数据的置信度靠批次验证的密度堆出来。
碳纤增强体系在桨叶上的位置是主承力层，碳纤的比刚度和疲劳性能是桨叶的骨架，表面的耐磨和耐候层是铠甲。
两层结构的结合力是关键工艺，层间的分层在高速旋转下是灾难性的，前缘的耐磨条或耐磨涂层把磨粒磨损挡在外面，骨架和铠甲各司其职，这个结构思路在桨叶上是教科书级的。
桨毂是冲击件，起飞降落的冲击载荷全走桨毂，增韧体系的吸能能力是桨毂的主指标。桨毂的失效模式是冲击开裂，开裂的隐患在飞控报警之前难以察觉，桨毂的定期探伤和到期更换是行业惯例，耗材化的管理把冲击件的风险关进周期的笼子里。
动平衡是隐性门槛，桨叶的重量分布差半克，几千转的离心力放大成可感的振动，振动传到机身影响成像和飞行品质。动平衡的工艺靠配重微调，材料的密度均匀性是配重的前提，批次密度漂了，配重的工艺就要重调，密度一致性是桨叶料的隐藏指标。
耐候和抗紫外在桨叶上比机身更急，桨叶的表面积大、转速高，紫外的累积剂量比机身高。表层料的抗紫外体系按高原和高纬度的高紫外工况覆盖，粉化的表层在高速气流下剥离加速磨损，耐候是耐磨的前提，两层是一体的。
桨叶的验收有一套独特的指标，除了常规力学，还有气动面的轮廓度和表面粗糙度，轮廓度影响升力特性，粗糙度影响噪音和效率。
这两个指标的模具和工艺责任大，材料的流动性影响表面的复制性，高流动性牌号在精细纹面的复制上占优，表面质量的竞争一半在模具一半在料。
工程实测：4 条强制测试
测试1：低温脆断 -55℃。增韧 PA66 扎带 -55℃ 保持完整，通用 PA66 扎带 -55℃ 弯折即断。
测试2：蠕变 1000 h。PA66 卡箍夹紧力衰减 28%，PA66-GF30 衰减 15%，加橡胶内衬后进一步降到 8%。
测试3：阻燃等级。通用 PA66 扎带 0.8 mm 壁厚仅 V-2，专用牌号可达 V-0（1.6 mm）。
测试4：烟密度。无卤体系扎带 Ds = 90，达到内饰件要求。
边界声明
| 工况 | 推荐材料 |
|---|
| 线束扎带 | 增韧 PA66，无卤阻燃 |
| 管路卡箍 | PA66-GF30 + 橡胶内衬 |
| 衬套 / 垫圈 | PA66 或 PA12 |
| 导线卡子 | PA66-GF15 无卤阻燃 |
| 承力紧固件 | 钛合金 / 不锈钢（不走塑料） |
工程备忘
航空紧固件承力走金属，改性尼龙只做非承力件——扎带、卡箍、衬套、护线环。
真正的门槛不是性能而是批次可追溯和文件完整，很多询价最后卡在质保文件上而非价格。
追问三连
问一：桨叶能做免维护吗？免维护是伪命题，磨粒磨损是物理过程，只能延缓不能消除。行业机按小时更换桨叶是成熟的耗材模式，消费机用户自己看磨损标识更换，磨损的可见化设计比声称免维护诚实，也更能积累信任。
问二：自锁桨叶的可靠性怎么验证？桨叶和桨毂的快拆结构里，锁紧机构的防松是安全底线，锁紧件的塑料件的抗蠕变要过热循环验证。快拆的便利和安全是一对矛盾，防松的结构冗余要留，锁到位的手感反馈要明确，安全件上不留模糊空间。
问三：桨叶的噪音怎么降？噪音来自叶尖的气动和表面粗糙度，叶尖的形状和表面的光洁度联合决定。低噪音桨叶是农业和城市场景的刚需，表面工艺的投入值得，噪音每降几分贝，城市场景的准入就宽一档，这几分贝是市场的门票。
反向案例与收尾判断
某厂为抢低价市场，把桨叶的前缘耐磨条去掉，靠本体料硬扛，台架测试的磨损速率翻倍，标称寿命砍半，宣传页上不敢写寿命只写强度。用户两个月换一次桨，电商评价里耗材成本成了槽点，低价的机身买回来，耗材的钱加倍还。
桨叶这个品类，寿命就是性价比，前缘保护的成本摊到每小时飞行里不到一顿饭钱，省掉它，用户的每小时成本翻倍，这笔账用户算得明白，市场也教育得明白。
实战案例：常见踩坑与正解
踩坑一：按普通工业件的物性表直接套到航空特种场景，结果装车半年就出现烟毒超标 / 低温脆裂 / 阻燃复检不过。
正解：这类场景是标准先行——适航或轨交的阻燃烟毒标准、低温冲击标准全部要重新核对，普通改性尼龙物性表只覆盖常温力学性能，完全不适用——这是 80% 首批送样失败的根因。
踩坑二：为了减重把玻纤含量一路加上去，结果薄壁处玻纤外露、表面浮纤、尺寸飘。正解：减重靠结构而不是单纯加纤，薄壁件走 GF30 上限，超过就要换高流动牌号或加矿物填充。
踩坑三：只验证常温性能，忽略了高低温交变和盐雾。正解：服役环境验证要按整机寿命做，高低温循环 + 盐雾 + 湿热老化三项一起做，少一项就是批量隐患。
这三个坑都是量产前必须自查的清单。
补记：四条来自桨叶产业的延伸判断
桨叶的耗材化是行业成熟度高的标志，按小时更换的订阅式耗材包在行业机市场跑通，耗材包的收入稳定。
耗材包的材料要求是批次一致性，飞行小时数的预测精度依赖疲劳数据的稳定，一致性的材料是耗材商业模式的地基，料厂在这个模式里的角色从供货变成数据伙伴。
农业植保的桨叶工况最恶劣，药液的腐蚀加沙尘加高湿，植保桨叶的耐化学和耐磨是双高要求。
植保市场的耗材更换频率高，耗材的年市场容量大，专门为植保工况设计的桨叶材料体系是细分机会，这个细分的用户对寿命敏感、对价格也敏感，性价比的平衡点要摸准。
城市低空场景对桨叶的噪音和安全等级要求高，坠落的动能要求桨叶在失效时可控断裂，断裂的模式设计是新的工程题。
安全设计对材料的要求不只是强度，还有断裂能的控制，这个方向的研究和验证都是新增量，城市准入的政策每放宽一档，安全桨叶的市场就大一圈。
桨叶的回收开始被讨论，碳纤复合料的回收是行业难题，热固性体系难回收，热塑性体系的可回收性好在兴起。热塑性桨叶的性能边界在扩展，回收的故事叠加性能的达标，热塑性桨叶的份额会逐步上来，材料厂在热塑性桨叶上的布局值得提前。
增补：另四条来自飞行的观察
观察之一，桨叶的平衡检测正在从人工走向自动，动平衡机的检测节拍决定产能，自动化的平衡补偿工艺把良率提上去。平衡数据的留存按叶号管理，装机后出问题的桨叶能追到配重的记录，桨叶的质量追溯比机身更细，因为它的失效后果更直接。
观察之二，植保机的药液对桨叶的腐蚀被很多厂低估，药液的成分复杂，酸碱性和表面活性剂的组合对表面层是慢性攻击。植保桨叶的耐化学验证要用真实的药液配方，清水验证合格的桨叶在药液里寿命减半，这个测试的差价就是植保桨叶口碑的来源。
观察之三，桨叶的包装运输是隐形损耗，裸装运输的桨叶前缘磕碰，装机前的损伤让寿命打折。运输的防护设计和包装材料的选择是一笔小钱大账，前缘护套的成本几块钱，护的是几百块的桨叶和用户的信任，包装的工程化在耗材行业值得单独对待。
观察之四，桨叶的设计仿真和实测的差距在前缘磨损上最大，仿真的磨粒模型不成熟，实测数据才是设计的闭环。建立自己的磨损数据库，按场景积累沙尘浓度和磨损速率的对应关系，数据库是桨叶厂的核心资产之一，仿真可以吹，数据库不能假。
结语
把料倒进机器之前——选料这件事，越早问越省事。
这类件的选料与试模，可以一起聊。
What type of modified nylon is used for 109 aerospace fasteners?
The division of labor for fasteners is very clear.
Fasteners in the aerospace field are divided into two categories. Load-bearing fasteners (bolts, rivets, high-strength bolts) use titanium alloy, aluminum alloy, and stainless steel—plastics are not used in this field.
Non-load-bearing fasteners (harness ties, pipe clamps, wire clips, bushings, washers, wire protection rings) are the main domain of modified nylon. These types of parts are extremely numerous, with a single machine using up to several thousand pieces, and weight reduction and flame retardancy are the primary requirements.
On-site restoration
Last June, at the test flight field of a drone factory, an engineer took out a set of propeller blades that had been used for three hundred hours. The wear marks on the tips were visible to the naked eye, and the leading edge on the windward side looked like it had been sanded. Next to it was a set of blades that had been used for two hundred hours, and the leading edge was worn even deeper. The two sets of blades were made of different materials, and the wear rate differed by a factor of two.
He said a golden phrase about propeller selection: the lifespan of a propeller isn't determined by how many hours you fly, but by how much sand the leading edge has taken. Abrasive wear in sandy environments is the number one killer of propellers. The protection scheme for the leading edge and the wear resistance rating of the materials determine the cost structure of consumables in this industry. This understanding comes from hundreds of hours of actual flight data.
Cable ties are the most typical component
Nylon cable ties are the most widely used plastic fasteners in aviation, made from PA66 or PA6, and must pass three thresholds: flame retardant V-2 or above, compliant with smoke and toxicity standards, and resistant to brittleness at low temperatures.
The difference between aerospace-grade cable ties and civilian cable ties lies in two points: first, the raw materials must be new and recycled materials cannot be added; second, they must have batch traceability.
Low temperature is key — outside the cabin at -55°C, an ordinary cable tie will break with just one fold, so a toughened grade must be used.
The clamp and bushing must be creep-resistant
The pipeline clamp tightens the pipeline for a long time and bears continuous preload. PA66 will creep under continuous load — after 1000 hours the clamping force declines by 20%-30%, and the pipeline becomes loose.
There are three solutions: first, use PA66-GF30 to improve creep resistance; second, use a rubber lining inside the clamp to provide elastic compensation; third, reserve a margin for secondary tightening in the design.
These three are usually used in combination.
Flame retardant and smoke toxicity also apply
Although fasteners are small in size, they are numerous, and their total surface area and total mass cannot be ignored; they must also meet FST requirements.
The most likely place to fail here is the cable tie—thin-walled parts naturally have a low flame retardant rating, and ordinary PA66 cable ties can only reach V-2.
To upgrade the grade, flame retardants need to be added, but flame retardants reduce toughness and affect low-temperature performance. Therefore, aviation cable ties usually use thin-wall special flame-retardant toughened grades and cannot be replaced with general-purpose grades.
Traceability is an implicit threshold
The traceability requirements for aviation parts are far higher than for industrial parts. Each batch of material must have a complete batch number, physical property report, and flame retardant report, and must be traceable to the batch of the raw resin.
The requirements for suppliers are: no use of sub-brand materials, no mixing of batches, and the ability to provide complete warranty documents. Many inquiries ultimately get held up because of documentation, not price — this is something buyers need to confirm with suppliers in advance.
Extended Judgment: Hidden Variables of Fasteners
There are three hidden variables that are most easily overlooked. The first is the compatibility of the installation tool — the tension setting of the cable tie gun must match the specifications of the cable tie; too much tension will break it, while too little will cause it to loosen.
Second is compatibility with piping materials — the migration of certain plasticizers can accelerate PA aging, so clamps and piping need to undergo contact aging verification. Third is storage period — PA cable ties will lose water and become brittle if stored for a long time, so the warehouse needs to control humidity, and it is recommended to use them within 12 months after opening.
A deeper look: The origin of a few numbers
The operating condition of the blades involves high-frequency fatigue combined with aerodynamic loads, with rotational speeds of several thousand revolutions per minute and tens of thousands of cyclic loads per minute. Fatigue is the main axis of the design.
The fatigue failure mode of the blade is that cracks initiate from the leading edge or root, propagate quickly, and show short signs before failure. Therefore, the blade's life management enforces replacement by hours, and the accuracy of life management is based on the confidence of fatigue data, which relies on batch-validated density to build up the confidence of the data.
The position of the carbon fiber reinforced system on the blade is the main load-bearing layer; the specific stiffness and fatigue performance of the carbon fiber form the skeleton of the blade, and the surface wear-resistant and weather-resistant layer is the armor.
The bonding strength of the two-layer structure is a key process. Delamination between layers is catastrophic under high-speed rotation. Wear-resistant strips or coatings on the leading edge keep abrasive wear out, and the framework and armor each play their role. This structural concept is textbook-level for blades.
The propeller hub is an impact component, and the impact loads during takeoff and landing are all borne by the hub. The energy absorption capacity of the toughening system is the main indicator of the hub. The failure mode of the hub is impact cracking, and the hidden risk of cracking is difficult to detect before the flight control alarm triggers. Regular inspection and scheduled replacement of the hub are industry practices, and consumable-based management confines the risk of impact components within a cycle.
Dynamic balancing is a hidden threshold. A half-gram difference in the weight distribution of the blades can be amplified by the centrifugal force at thousands of revolutions into noticeable vibrations. These vibrations are transmitted to the airframe, affecting imaging and flight quality. The process of dynamic balancing relies on fine-tuning with counterweights, and the uniformity of the material's density is a prerequisite for counterweighting. If the batch density fluctuates, the counterweighting process must be readjusted. Density consistency is a hidden criterion for blade material.
Weather resistance and UV resistance are more critical for the blades than for the fuselage. The blades have a larger surface area and higher rotational speed, resulting in a higher cumulative dose of UV than the fuselage. The UV resistance system of the surface material is designed to withstand high UV conditions typical of high-altitude and high-latitude environments. The powdered surface layer peels off and accelerates wear under high-speed airflow, making weather resistance a prerequisite for wear resistance; the two layers are integrated.
The acceptance of the blades has a set of unique criteria. In addition to the conventional mechanical properties, there are also the contour accuracy and surface roughness of the aerodynamic surface. Contour accuracy affects lift characteristics, while roughness affects noise and efficiency.
The mold and process responsibilities of these two indicators are significant. The fluidity of the material affects surface replication. Grades with high fluidity have an advantage in replicating fine textures. The competition in surface quality is half dependent on the mold and half on the material.
Engineering Test: 4 Mandatory Tests
Test 1: Low-temperature brittle fracture -55℃. Toughened PA66 cable tie remains intact at -55℃, while general PA66 cable tie breaks immediately when bent at -55℃.
Test 2: Creep 1000 h. The clamping force of PA66 hose clamps decreased by 28%, PA66-GF30 decreased by 15%, and after adding a rubber liner it further decreased to 8%.
Test 3: Flame retardant rating. General PA66 cable ties with 0.8 mm wall thickness are only V-2, while specialized grades can reach V-0 (1.6 mm).
Test 4: Smoke density. Halogen-free system cable tie Ds = 90, meeting the requirements for interior components.
Boundary Declaration
| Operating condition | Recommended materials |
|---|
| wire harness cable tie | Toughened PA66, halogen-free flame retardant |
| pipe clamp | PA66-GF30 rubber lining |
| Bushing / Washer | PA66 or PA12 |
| wire clamp | PA66-GF15 Halogen-Free Flame Retardant |
| Load-bearing fastener | Titanium alloy / Stainless steel (no plastic) |
Engineering Memo
Aerospace fasteners that bear load are made of metal, while modified nylon is only used for non-load-bearing parts—zip ties, clamps, bushings, and wire protection rings.
The real threshold is not performance but batch traceability and document completeness; many inquiries ultimately get stuck on warranty documents rather than price.
Three consecutive follow-up questions
Question 1: Can blades be maintenance-free? Maintenance-free is a false proposition; abrasive wear is a physical process that can only be delayed, not eliminated. Replacing blades hourly in industrial machines is a mature consumable model. Users of consumer phones can replace by checking wear labels themselves. Visible wear design is honest and builds trust better than claims of maintenance-free design.
Question 2: How to verify the reliability of self-locking blades? In the quick-release structure of blades and hubs, anti-loosening of the locking mechanism is the safety baseline, and the creep resistance of plastic parts of locking parts must be verified through overheating cycles. Convenience and safety of quick-release are contradictory: redundancy in anti-loosening structures should be retained, tactile feedback when locked must be clear, and no ambiguous space should be left on safety parts.
Question 3: How to reduce the noise of paddle blades? Noise comes from the aerodynamics of the blade tip and surface roughness, determined by the shape of the tip and the surface smoothness. Low-noise paddles are essential for agriculture and urban scenarios. The investment in surface craftsmanship is worthwhile. Every few decibels of noise reduction increases urban market access, and these few decibels are the ticket to the market.
Reverse Case and Final Judgment
A factory, aiming to capture the low-price market, removed the wear-resistant strips from the leading edge of the blades and relied on the body material to withstand the load. The wear rate in bench tests was doubled, the nominal lifespan was cut in half, and the promotional page didn't dare to mention lifespan but only strength. Users replaced the propeller every two months, and e-commerce reviews criticized the cost of consumables. Buying a low-priced machine body doubled the cost of consumables.
For the blade category, lifespan is cost-effectiveness. The cost of leading edge protection is less than the cost of a meal per hour of flight. Skipping it doubles users' hourly costs. Users calculate this clearly, and the market understands the lesson.
Practical Case: Common pitfalls and correct answers
Pitfall One: Applying the physical property tables of ordinary industrial parts directly to aviation special scenarios, but after half a year of installation, smoke toxicity exceeded limits, low-temperature brittleness, and flame retesting failed.
Correct answer: This scenario requires standards first—airworthiness or metro fire retardant smoke and poisoning standards and low-temperature shock standards must all be rechecked. Ordinary modified nylon physical property sheets only cover ambient temperature mechanical properties and are completely unsuitable—this is the root cause of 80% of initial sample submission failures.
Pitfall 2: To reduce weight, they increased the glass fiber content all the way, resulting in exposed fibers at thin-walled areas, floating fibers on the surface, and loose dimensions. Correct answer: Weight reduction depends on structure, not just adding fibers. Thin-walled parts should follow the GF30 limit; if exceeded, they need to be upgraded to higher flow grades or added mineral filler.
Pitfall 3: Only tested room temperature performance, ignoring alternating high and low temperatures and salt spray. Correct answer: Service environment verification should be done based on the machine's lifespan, including high-low temperature cycling + salt spray + damp heat aging all at once. Missing one means a batch hazard.
These three pitfalls are all must-check checklists before mass production.
Supplement: Four extended judgments from the paddle industry .
The consumableization of paddle blades is a sign of industry maturity. Subscription-based consumables packages that change by the hour are working well in the industry market, and consumables have stable revenue. The material requirements for
consumables packages are batch consistency. The accuracy of flight hour predictions depends on the stability of fatigue data. Consistent materials form the foundation of the consumables business model, and the role of material manufacturers in this model shifts from being supplied to becoming data partners.
Agricultural plant protection paddle blades operate under the harshest conditions, with chemical corrosion, dust, and high humidity. The chemical and wear resistance of plant protection blades are both highly demanded.
The plant protection market has a high frequency of consumables and large annual market capacity. The paddle blade material system specially designed for plant protection conditions presents a niche opportunity. Users in this segment are sensitive to both lifespan and price, so the balance of cost-effectiveness must be accurately grasped.
Urban low-altitude scenarios require high noise and safety levels for paddle blades. The kinetic energy of falling requires the blades to break controllably in the event of failure, and the design of fracture modes is a new engineering challenge.
Safety design requires not only strength but also control of breaking energy. Research and validation in this direction are increments; every time city access policies are relaxed, the market for safety paddle blades expands significantly. The recycling of
blades is being discussed. Recycling carbon fiber composites is an industry challenge, thermosetting systems are hard to recycle, and the recyclability of thermoplastic systems is on the rise. The performance boundaries of thermoplastic blades are expanding. With recycling stories and performance standards, the share of thermoplastic blades will gradually increase. Material factories should be proactive in their layout on thermoplastic blades.
Addition: Another of four observations from flight
is that blade balance inspection is moving from manual to automated. The detection cycle of dynamic balancing machines determines production capacity, and automated balancing compensation processes are improving yield. Balance data is retained and managed by blade number. After installation, blades with problems can be traced back to counterweight records. Blade quality traceability is finer than that of the machine body, as the consequences of failure are more direct.
Observation 2: Many factories underestimate the corrosion caused by plant protection machine solutions to paddle blades. The complex composition of the solution and the combination of acidity, alkalinity, and surfactants cause chronic damage to the surface layer. Chemical resistance testing of plant protection paddle blades requires a real chemical solution formulation. Blades that pass the test in the solution have a halved lifespan. This price difference is the source of the reputation of the plant protection blades.
Observation 3: Packaging and transportation of paddle blades involves hidden losses. The leading edge of the blades in bare packaging is bumped, and damage before installation shortens their lifespan. Protective design and packaging material selection during transportation are a small expense, big money. The cost of the leading edge sheath is a few yuan, protecting blades worth hundreds of yuan and user trust. Packaging engineering in the consumables industry deserves special attention.
Observation Four: The gap between blade design simulation and actual measurements is greatest in leading edge wear. The simulated abrasive model is immature, and measured data is the design closed loop. Build your own wear database and accumulate correspondences between dust concentration and wear rate according to scenarios. The database is one of the core assets of the blade factory; simulation can be exaggerated, but the database must not be fake.
Conclusion
Before Pouring Materials into the Machine — The earlier you ask about material selection, the easier it is.
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