摘要
在查明剪毛机刀片刃口和刃面不同的失效方式和磨损机理的基础上,运用摩擦学理论,借鉴前人的研究成果,提出承受以石英为代表的磨粒犁削、冲击磨料磨损、接触疲劳磨损和抑制粘着磨损的刃口和刃面应具备的硬度。经淬火、回火、硬度约62HRC的低合金工具钢刀片具有较高的耐磨性,但刀片硬度还应根据羊种和含砂情况作1～2HRC的调整。介绍了经获得最佳含碳量马氏体、G.S.预处理和N.M.处理三种工艺处理的刀片的使用效果。经N.M.处理的刀片不但刃口、刃面组织结构极佳,而且刃口、刃面的硬度分布合理,因而寿命大幅度提高。
Desirable hardnesses of cutting edge and blade face of the shearing machine blade subjected to quartz-type abrasive grain ploughing, impact abradant wearing, contact fatigue wearing and restrained adhensive wearinghave been put forward according to their failure form, wearing mechanism and tribological theory and the adoptionof the results obtained by predessors for reference. Quenched and tempered blades of low alloy tool steel withhardness of about 62 HRC will be provided with good wear resistance, but hardness of the blades should be adjustedby 1HRC～2HRC according to the kind of sheep and content of sand. Service effect of the blades heat-treatedby such kinds of process as producing martensite with optimum carbon content, G.S.processing and N.M. processingwas introduced. The blades treated by N.M processing have not only excellent microstructure but reasonable hardnessdistribution along cutting-edge and blade face, and therefore their service life is greatly increased.
出处
《热处理》
CAS
2005年第1期29-35,共7页
Heat Treatment
基金
国家自然科学基金59165005项目之一部分。
