摘要
研制了含粒状碳化物的新型莱氏体型铸造模具钢，发现其可使传统莱氏体型铸造模具钢的低强韧性得以提高，并探讨了其磨损机理．结果表明，碳化物形态（大小、形貌、分布及数量）对莱氏体钢的耐磨性有明显影响．由于该新型铸造模具钢有沿枝晶间均匀分布、形貌圆整的１次碳化物和晶内弥散析出的大量２次碳化物，其耐磨性略高于相近碳化物形态的锻造３～４级偏析Ｃｒ１２类钢，明显高于锻造１～２级偏析Ｃｒ１２类钢和传统莱氏体型铸造模具钢．
Novel ledeburite cast die steel with granular carbide was fabricated to increase the strength and toughness of conventional ledeburite cast die steel with network carbide. The wear mechanism was discussed also.The results show that carbide morphology had obvious effect on the wear resistance. The primary and the secondary carbide both contributed to the good wear resistance of the cast die steel,which was slightly higher than that of forged Cr12 type steel (segregation grade 3￣4) and apparently higher than that of forged Cr12 type steel (segregation grade 1￣2) and conventional ledeburite cast die steel.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1999年第1期33-38,共6页
Tribology
基金
国家自然科学基金
关键词
莱氏体钢
铸造模具
粒状碳化物
耐磨性
模具钢
ledeburite steel
cast die
carbide morphology
granular carbide
wear resistance
