软化处理对ZG95Cr17Ni2不锈钢组织及硬度的影响
|
摘要
利用扫描电镜、能谱分析、洛氏硬度计等测试手段,研究了ZG95Cr17Ni2马氏体不锈钢在普通退火、等温球化退火、高温回火+等温球化退火种处理工艺下组织及硬度的变化。结果表明,3种处理后的组织均由珠光体+莱氏体+碳化物组成,其中前两种处理后的基体主要由片状或不均匀粒状珠光体组织组成;而经高温回火+等温球化退火处理后的基体主要由均匀细小的粒状珠光体组成。采用普通退火、等温球化退火后的ZG95Cr17Ni2不锈钢硬度(HRC)为36～46,经过高温回火+等温球化处理后的硬度降至29。
The changes of microstructure and hardness of ZG95Cr17Ni2 martensitic stainless steel under three different softening treatment,such as conventional annealing,isothermal spheroidizing annealing,high temperature tempering+isothermal spheroidizing annealing,were investigated by means of scanning electron microscope,energy spectrum analysis and Rockwell hardness tester.The results reveal that microstructure of the ZG95Cr17Ni2 martensitic stainless steel at three different softening treatment consists of pearlite+ledeburite+carbides,and the first two substrates are mainly composed of flaky or uneven granular pearlite,and the matrix is composed of homogeneous and fine granular pearlite after high temperature tempering +isothermal spheroidizing annealing.The hardness of ZG95Cr17Ni2 martensitic stainless steel after annealing with conventional annealing and isothermal spheroidization reach 36～46 HRC,and the hardness is reduced to 29 HRC after high temperature tempering+isothermal spheroidizing softening treatment.
The changes of microstructure and hardness of ZG95Cr17Ni2 martensitic stainless steel under three different softening treatment,such as conventional annealing,isothermal spheroidizing annealing,high temperature tempering+isothermal spheroidizing annealing,were investigated by means of scanning electron microscope,energy spectrum analysis and Rockwell hardness tester.The results reveal that microstructure of the ZG95Cr17Ni2 martensitic stainless steel at three different softening treatment consists of pearlite+ledeburite+carbides,and the first two substrates are mainly composed of flaky or uneven granular pearlite,and the matrix is composed of homogeneous and fine granular pearlite after high temperature tempering +isothermal spheroidizing annealing.The hardness of ZG95Cr17Ni2 martensitic stainless steel after annealing with conventional annealing and isothermal spheroidization reach 36～46 HRC,and the hardness is reduced to 29 HRC after high temperature tempering+isothermal spheroidizing softening treatment.
引文
[1]刘宁,张明秀,舒士明,等.热处理对Cr17Ni2钢组织和硬度的影响[J].金属热处理,1997(3):3-5.
[2]ZHU Q T,LI J,SHI C B,et al.Effect of quenching process on the microstructure and hardness of high-carbonmartensitic stainless steel[J].Journal of Materials Engineering and Performance,2015,24(11):4 313-4 321.
[3]于文涛,李晶,史成斌,等.高碳马氏体不锈钢8Cr13MoV钢铸态组织及碳化物[J].工程科学学报,2016,38(9):1 264-1 269.
[4]MESA D H,TORO A,SINATORA A,et al.The effect of testing temperature on corrosion-erosion resistance of martensitic stainless steels[J].Wear,2003,255(1-6):139-145.
[5]宋自力,杜晓东,陈翌庆,等.7Cr17Mo马氏体不锈钢组织和冲击韧性[J].材料热处理学报,2011,32(5):95-99.
[6]黄晓琳,贺跃辉,张乾坤,等.热处理工艺对18Cr马氏体不锈钢组织与力学性能的影响[J].粉末冶金材料科学与工程,2017,22(4):503-509.
[7]高飞,宗晓明,权超健,等.低温渗碳处理对G95Cr18马氏体不锈钢组织和性能的影响[J].轴承,2017(5):19-22.
[8]LI H Y,DONG C F,XIAO H,et al.Relationship between microstructure and corrosion behavior of Cr12Ni3Co12Mo4Wultra-highstrengthmartensitic stainless steel[J].Acta Metallurgica SinicaEnglish Letters,2016,29(11):1 064-1 072.
[9]刘佐仁.合金钢的退火不软化行为[J].中南工业大学学报,2001,32(3):298-301.
[10]姚长贵,孙利军.马氏体型不锈钢热加工后软化处理工艺研究[J].江苏冶金,2005,33(2):5-8.
[11]陈溪强.超级13Cr钢软化工艺研究[J].热处理,2014,29(6):21-23.
[2]ZHU Q T,LI J,SHI C B,et al.Effect of quenching process on the microstructure and hardness of high-carbonmartensitic stainless steel[J].Journal of Materials Engineering and Performance,2015,24(11):4 313-4 321.
[3]于文涛,李晶,史成斌,等.高碳马氏体不锈钢8Cr13MoV钢铸态组织及碳化物[J].工程科学学报,2016,38(9):1 264-1 269.
[4]MESA D H,TORO A,SINATORA A,et al.The effect of testing temperature on corrosion-erosion resistance of martensitic stainless steels[J].Wear,2003,255(1-6):139-145.
[5]宋自力,杜晓东,陈翌庆,等.7Cr17Mo马氏体不锈钢组织和冲击韧性[J].材料热处理学报,2011,32(5):95-99.
[6]黄晓琳,贺跃辉,张乾坤,等.热处理工艺对18Cr马氏体不锈钢组织与力学性能的影响[J].粉末冶金材料科学与工程,2017,22(4):503-509.
[7]高飞,宗晓明,权超健,等.低温渗碳处理对G95Cr18马氏体不锈钢组织和性能的影响[J].轴承,2017(5):19-22.
[8]LI H Y,DONG C F,XIAO H,et al.Relationship between microstructure and corrosion behavior of Cr12Ni3Co12Mo4Wultra-highstrengthmartensitic stainless steel[J].Acta Metallurgica SinicaEnglish Letters,2016,29(11):1 064-1 072.
[9]刘佐仁.合金钢的退火不软化行为[J].中南工业大学学报,2001,32(3):298-301.
[10]姚长贵,孙利军.马氏体型不锈钢热加工后软化处理工艺研究[J].江苏冶金,2005,33(2):5-8.
[11]陈溪强.超级13Cr钢软化工艺研究[J].热处理,2014,29(6):21-23.