摘要
热锻模具在使用中早期出现沿型腔的细小裂纹,在后续模具使用中会迅速扩展而导致模具早期失效。分析出现早期疲劳裂纹的模具,发现这种模具中经常有粗大晶粒和"宽晶界"等异常组织!这种疲劳裂纹又常起源于这种"宽晶界",并导致模具早期失效。本文分析这种H13钢中的"宽晶界",认为这是模具钢"氢致疏松"的表现,并对H13钢的氢致疏松损伤机理作了重点论述,解释了钢材常见氢致损伤过程和简单有效的去氢处理方法。
Hot forging dies is often found along the cavity to appear fine fatigue cracks which are rapid expansion in the subsequent usage to lead to early failure die.Analyzing die of early fatigue crack,There are often coarse grains and ＂wide grain boundary＂etc.abnormal structures in the mold!The fatigue cracks are often originated in this ＂wide grain boundaries＂,and lead to early failure of die.In this paper,analyzed this ＂wide grain boundaries＂ in H13 steel,that is ＂hydrogen-induced loose dsmage＂ performance of the tool steel,to focus on its mechanism,and to explains the common hydrogen-induced damage process of steel and a simple and effective approach of dehydrogenation.
出处
《热处理技术与装备》
2011年第1期26-30,共5页
Heat Treatment Technology and Equipment
关键词
H13钢
氢致疏松
宽晶界
H13 steel
hydrogen induced loose damage
wide grain boundaries
