摘要
对剪毛机刀片失效方式和磨损机理的研究表明,刀片的刃口与刃面有不同的磨损机理和性能要求.根据钢中碳化物在刀刃磨损过程中的作用,提出刀片的组织设计,认为刃面上有数量足够、粗细适度和均匀分布的碳化物,可有效地抵御石英之类高硬度磨粒的划伤.但碳化物在刃口则有害,它会造成崩刃并加剧由剥层理论所描述的磨损过程.本文提出了含氮马氏体化处理(N.M处理)新工艺,它可使工具钢表层碳化物完全消失,得到刃口无碳化物而刃面保留碳化物的特殊组织,达到剪毛机刀片组织设计的要求,大幅度提高刀片寿命.
Failure and wear analysis of sheep shearing machine cutter indicate that the wear mechanism and property requirement are different to the cutting edge and cutting face.According to the behavior of carbides in the process of cutting wear,a microstructure design of cutter is provided as that the carbides in the cutting face with sufficient,even distribution and just right in size could prevent scratch from high hard grains such as quartz sand etc.but carbides on the cutting edge are harmful and will give rise to tipping and aggravate the wear process described in 'the deiamination theory of wear'.Nitrogen-containing martensitizing treatment (N.M.treatment) new technology in this paper gets the special microstructure that the cutting face exist carbide but the cutting edge do not.These microstructure accord with the demands of sheep shearing machine cutter and therefore increase the service life of cutter substantially.
出处
《金属热处理》
CAS
CSCD
北大核心
1993年第10期21-26,共6页
Heat Treatment of Metals
基金
国家自然科学基金
关键词
热处理
马氏体转变
剪毛机刀片
sheep shearing machine cutter
nitrogen-containing martensitizing(N.M.) treatment
