冷处理温度对1Cr20Co6Ni2WMoV钢组织和力学性能的影响

特殊钢 ›› 2007, Vol. 28 ›› Issue (1): 35-37.

冷处理温度对1Cr20Co6Ni2WMoV钢组织和力学性能的影响

张红^1,2 , 王立民² , 杨钢² , 刘荣佩¹, 刘宁^1,2

1昆明理工大学材料与冶金工程学院，昆明650093;
2钢铁研究总院结构材料研究所，北京100081

收稿日期:2006-09-18 出版日期:2007-01-01 发布日期:2023-01-13
作者简介:张红(1978-),女，硕士研究生，2001年沈阳理工大学材料成型及控制专业毕业，从事耐热钢研究。

Effect of Cold Treatment Temperature on Structure and Mechanical Properties of Steel 1Cr20Co6Ni2WMoV

Zhang Hong^1,2, Wang Limin², Yang Gang², Liu Rongpei¹, LiuNing^1,2

1 Institute of Materials and Metallurgy Engineering,Kunming University of Science and Technology,Kunming 650093;
2 Institute for Structural Materials,Central Iron and Steel Research Institute,Beijing 100081

Received:2006-09-18 Published:2007-01-01 Online:2023-01-13

摘要/Abstract

摘要： 马氏体热强钢1Cr20Co6Ni2WMoV用真空感应炉冶炼，锭重22.5 kg并锻成中16 mm棒材。试样经 1060℃1h油冷淬火， -70℃或-192℃2h空冷的冷处理，640 ℃3 h空冷回火处理。试验结果表明， 1Cr20Co6Ni2WMoV钢在热处理后的组织由高密度位错的回火板条马氏体、残余奥氏体、δ-铁素体和M₂₃C₆组成。随冷处理温度由-70 ℃降至-192℃,晶界上M₂₃C₆析出数量增多，晶内位错密度升高，残余奥氏体含量降低，钢的抗拉强度和屈服强度分别由1045 MPa和715 MPa提高至1090 MPa和760 MPa。

关键词: 冷处理, 1Cr20Co6Ni2WMoV马氏体热强钢, 组织, 力学性能

Abstract: Martensite heat resistant steel 1Cr20Co6Ni2WMoV was melted by a vacuum induction fumace with 22.5 kg ingot and forged to 中16 mm bar.Heat treatment process of samples were quenching at 1060 ℃ for 1h oil cooling + cold treatment at -70℃ or- 192 ℃ for 2 h air cooling + tempering at 640 ℃ for 3 h air cooling. Test results showed that with both heat treatment process the structure of steel 1Cr20Co6Ni2WMoV consisted of high density dislocation tempering lath martensite,residual austenite,δ- ferite and M₂₃C₆.With cold treatment temperature decreased from -70 ℃ to - 192 ℃ the amount of M₂₃C₆ precipitated at grain boundary and the dislocation density in grain inside increased,the a- mount of residual austenite decreased and the tensile and yield strength of steel respectively increased from 1045 MPa and 715 MPa to 1090 Mpa and 760 MPa.

Key words: Cold Treatment, 1Gr20Co6Ni2WMoV Martensite Heat Resistant Steel, Structure, Mechanical Properties

张红, 王立民, 杨钢, 刘荣佩, 刘宁. 冷处理温度对1Cr20Co6Ni2WMoV钢组织和力学性能的影响[J]. 特殊钢, 2007, 28(1): 35-37.

Zhang Hong, Wang Limin, Yang Gang, Liu Rongpei, Liu Ning. Effect of Cold Treatment Temperature on Structure and Mechanical Properties of Steel 1Cr20Co6Ni2WMoV[J]. Special Steel, 2007, 28(1): 35-37.