SKH51与65Mn在铝合金压铸模铸孔型芯中应用的对比研究  

Comparison Study of SKH51 Steel and 65Mn Steel Application in Al Alloy Die-casting Die Core

作　　者：王明杰[1] 刘雪华[1] 李巍[1] 王建华[1] 朱辉[1] 

机构地区：[1]福建工程学院机电及自动化工程系,福建福州350014

出　　处：《铸造技术》2007年第4期515-518,共4页Foundry Technology

摘　　要：把试样按照铝合金压铸模的工作温度区间（20～700℃）进行加热——冷却循环，研究了SKH51和65Mn的抗热疲劳和抗高温氧化性能。结果表明，SKH51试样的组织没有明显变化，65Mn试样表面形戍了明显氧化层。SKH51中较高含铬量、含鸽量使其具有良好的抗高温氧化能力，远好于65Mn。65Mn高温氧化相对质量损失是SKH51的几百倍。在试样小直径、外形简单的情况下，SKH51和65Mn试样表面均未发现热疲劳裂纹。SKH51可以用来制作铝合金压铸模铸孔型芯，65Mn不能用来制作铝合金压铸模铸孔型芯。The thermal fatigue and high temperature oxidation resistance of SKH51 steel and 65Mn steel were studied by circularly heating and cooling the samples in the aluminum die-casting die working temperature range （20～700℃ ）. The results show that the microstructure of SKH51 has no significant change, an obvious oxidation layer is formed on the surface of 65Mn sample, SKH51 steel with high contents of chromium and tunstgen has better oxidation resistance at elevated temperature than that of 65Mn. The high temperature oxidation relative quality loss of 65Mn is hundreds times larger than that of SKH51. There are no thermal fatigue cracks on the surface of SKH51 and 65Mn samples with small diameter and simple configuration. SKH51 steel can be used for making the diecasting die core, but 65Mn steel can not be used.

关 键 词：SKH51钢 65MN钢 铝合金压铸模 铸孔型芯 抗氧化性能 

分 类 号：TG249.2[金属学及工艺—铸造]