摘要
探究了热处理工艺对多元低、中碳中合金耐磨铸钢组织和性能的影响,特别分析了它们的强韧化机理。结果表明,低碳合金钢经945℃淬火、280℃回火后硬度值为49 HRC以上,韧性值超过224 J/cm2;中碳合金钢经945℃淬火、370℃回火后硬度值达48.6 HRC,韧性值90 J/cm2左右。两种材料具有较好的回火稳定性,基体组织主要是板条状马氏体,马氏体板条间少量薄膜状的残余奥氏体,以及界面上弥散的碳化物起到强韧化作用,材料综合性能表现良好。
The influence of heat treatment processs on the microstructure and properties of multi-element low and medium carbon alloy steel was studied, especially the mechanism of strengthening and toughening. The results show that, after quenching at 945 ℃ and tempering at 280 ℃, the hardness of low carbon alloy steel exceeds 49 HRC and the impact toughness is above 224 J/cm^2; after quenching at 945 ℃ and tempering at 370 ℃, medium carbon alloy steel has good comprehensive mechanical properties with hardness 48.6 HRC and impact toughness about 90 J/cm^2. Two kinds of material have good temper stability and comprehensive mechanical properties. The microstructure consists of tempered martensite, a small amount of residual austenite disperses between martensite laths and carbide to strengthen and toughen their matrix.
出处
《铸造技术》
CAS
北大核心
2012年第3期304-307,共4页
Foundry Technology
关键词
多元合金耐磨钢
冲击韧度
热处理
马氏体
impact toughness
heat treatment
wear resistant steel
martensite