摘要
介绍了一种工具钢在稍低于Ａｃｌ温度下不太长时间加热，使片状索氏体不完全球化，形成姜块状碳化物的工艺。用于剪毛机刀片代替球化退火作毛坯预处理，淬火后刀片寿命大幅度提高。本文从空间形貌上说明姜块状碳化物的形成机制，并从微观机理分析姜块状碳化物提高刀片耐磨性的原因。研究表明，细粒碳化物可使刃口强化，但不能阻挡已压入刃面砂粒的划伤；而粗粒碳化物弥散强化效果差，却能阻挡砂粒的划伤，但对刃口则会加剧崩刃。姜块状碳化物兼有粗粒和细粒碳化物的优点，兼顾刃口和刃面的不同性能要求，因而是刀片的理想组织。
The new heat treatment process for ginger like sorbite of low alloy cutlery steels was given in this paper.The characteristic of the new process is heating under Ac l temperature for suitable time to change lamellar Sorbite to ginger like Sobite.The life of the sheep shearing machine cutter after quenching is improved largely by using the new process instead of traditional spheroidizing annealing.The ginger like Sorbite forming mechanism and the high wear resistance of ginger like carbide cutter blade were studied in this paper.From research the following conclusion can be got:Small size carbide can strengthen the cutting edge but cannot resist the scratching of abrasive particles.Large size carbide can resist the scratching of abrasive particles but cause the edge tipping.The lumpy ginger like carbide having the advantage of small and large size carbide is the ideal microstructure of cutter blade.
出处
《金属热处理》
CAS
CSCD
北大核心
1999年第1期1-4,共4页
Heat Treatment of Metals
基金
国家自然科学基金
关键词
低合金刃具钢
索氏体化处理
退火
姜块状碳化物
low alloy cutlery steels,Sorbite treating,carbide morphology,sheep shearing machine cutter,wear with abrasive particle
