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淬火对Cr-Mo-Ni-Mn-Si低合金耐磨钢组织与硬度的影响
Effect of Quenching on Microstructure and Hardness of Cr-Mo-Ni-Mn-Si Low Alloy Wear Resistant Steel
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- DOI:
- 作者:
- 杨进德 丁旭
YANG Jinde;DING Xu
- 作者单位:
- 贵州大学工程训练中心 贵州大学机械工程学院
Engineering Training Center,Guizhou University,Guiyang 550025,China;School of Mechanical Engineering,Guizhou University,Guiyang 550025,China
- 关键词:
- 低合金耐磨钢 淬火 组织 硬度
low alloy wear resistant steel quenching microstructure hardness
- 摘要:
- 对Cr-Mo-Ni-Mn-Si低合金耐磨钢进行了不同温度与保温时间的淬火试验。采用显微组织观察、硬度测试研究了不同淬火温度与保温时间对该低合金钢组织与硬度的影响。结果表明:Cr-Mo-Ni-Mn-Si钢的最佳淬火工艺为86℃×30min保温并油淬,其组织为细小板条马氏体,硬度达到最大值44.8 HRC;随淬火温度升高和保温时间延长,钢中马氏体逐渐粗化、间距增大,其硬度值逐渐下降。
The quenching test of Cr-Mo-Ni-Mn-Si low alloy wear resistant steel at different temperature and holding time was carried out.The effects of quenching temperature and holding time on the microstructure and hardness of the low alloy steel were studied by microstructure observation and hardness test.The results show that the optimal quenching process of Cr-Mo-Ni-Mn-Si steel is 860℃×30 min heat holding and oil quenching.The microstructure of Cr-Mo-Ni-Mn-Si steel is fine lath martensite plate,and the hardness reaches the maximum of 44.8 HRC.With the increase of quenching temperature and holding time,the martensite in the steel coarsenes gradually,the spacing increases,and the hardness value decreases gradually.