摘要
对6CrW_2Si 钢剪刃经不同淬火温度的热处理工艺研究表明,980℃加热完全奥氏体化之后,适当地空冷再淬入油中,可以得到全部板条状马氏体组织.淬火后经200~280℃回火处理,与常规热处理工艺比较,抗弯强度相近,硬度提高2~4HRc,冲击韧性提高1倍.按此工艺处理的剪刃,使用寿命是原来的1.6倍.
The heat treatment of the shear knife of 6CrW_2Si steel at various quenching temperatures is studied.The results show that all lathed martensite structure can be obtained after pure austeniti- zation at 980℃ by quenching the material into oil after holding it in air for a while.Followed by tempering at 200-280℃,the steel offers a bending strength quite near to that obtained by conven- tional treatments while its hardness is raised by 2-4HRc,and the impact toughness increased twice.The service life of the shear knife treated by this technology is lengthened 1.6 times.
关键词
剪刃
淬火工艺
完全奥氏体化
Shear knife
Pure austenitization
Quenching
Lathed martensite
Impact toughness