防止不锈钢螺丝咬死有哪些方法

2025-04-04 15:11:35
推荐回答(1个)
回答(1):

螺纹咬死是不锈钢或合金螺纹紧固件常见的问题。咬死类似于一种冷熔接过程,主因是紧固件组装/锁入时速度、摩擦产生瞬间高温致金属熔合而产生沾黏现象。咬死经常发生在不锈钢、合金材料的螺丝、螺母上(其中又以不锈钢对咬死尤为敏感),是因为这些金属合金表面受损时,在其表面会产生氧化膜层以防止进一步锈蚀。当紧固件拧紧时,接触的螺纹表面受到的压力会破坏氧化膜,失去氧化膜的金属接触点会发生剥落而产生相互咬紧。解决方法有许多种类:表面涂一些润滑油脂或其他防黏涂料;采用不同牌号的材料分别制造的螺栓和螺母;采用施必牢变牙螺纹等方法,都可以不同程度解决咬死的问题。

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