摘要
研究真空气淬压力对4种马氏体不锈钢(2Cr13、9Cr18、1Cr17Ni2和0Cr17Ni4Cu4Nb)硬度的影响。结果表明,在1. 5、3、5 bar气淬压力下,直径?30、?50、?80 mm的2Cr13钢棒材心部硬度大于45 HRC,表面硬度大于49. 5 HRC。提高气淬压力,材料硬度增大。对于直径?30 mm的2Cr13钢棒材,心部硬度与表面硬度一致;对于直径?50和?80 mm的棒材,心部硬度低于表面硬度。直径为?30、?50、?80 mm的9Cr18、1Cr17Ni2、0Cr17Ni4Cu4Nb钢棒材,在1. 5、3、5 bar气淬压力下均淬透,材料心部硬度与表面硬度一致。
Effect of vacuum gas quenching pressure on hardness of four martensitic stainless steels( 2 Cr13,9 Cr18,1 Cr17 Ni2 and0 Cr17 Ni4 Cu4 Nb) was studied. The results show that the core hardness of the 2 Cr13 steel bars with diameter of ?30,?50 and ?80 mm under the gas quenching pressure of 1. 5,3 and 5 bar is greater than 45 HRC,respectively,and the surface hardness for the three steels is greater than 49. 5 HRC. When gas quenching pressure is increased,the hardness of 2 Cr13 steel increases. The core hardness of the 2 Cr13 steel bars with diameter of ?30 mm is the same as the surface hardness. The core hardness of the 2 Cr13 steel bars with diameter of ?50 and ?80 mm is lower than the surface hardness. The steel bars of 9 Cr18,1 Cr17 Ni2,0 Cr17 Ni4 Cu4 Nb with diameters of ?30,?50 and ?80 mm are all hardened under the gas quenching pressure of 1. 5,3 and 5 bar,and the core hardness is the same as the surface hardness.
作者
任伟
唐丽娜
吕超君
王健波
吴国华
张天德
Ren Wei;Tang Lina;LüChaojun;Wang Jianbo;Wu Guohua;Zhang Tiande(Shanghai Aerospace Equipments Manufacturer Co.,Ltd.,Shanghai 200245,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第4期156-160,共5页
Heat Treatment of Metals
基金
中国航天科技集团有限公司共性工艺研究项目(GXGY-2019-09)。
关键词
真空气淬
马氏体不锈钢
硬度
vacuum gas quenching
martensitic stainless steel
hardness
作者简介
任伟(1985-),男,高级工程师,硕士,主要从事热处理工艺研究,E-mail:ren_wei200@126.com;通讯作者:唐丽娜,高级工程师,博士,E-mail:linatang149@163.com。
