热处理方式对20Mn2钢组织和性能的影响
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- 英文论文题名：Influence of heat treatment mode on microstructure and properties of 20Mn2 steel
- 论文作者：马骁驰 ; 孙维连
- 英文论文作者：MA Xiao-chi ; SUN Wei-lian ; College of Mechanical and Electrical Engineering ; Agricultural University of Hebei
- 年：2016
- 作者机构：河北农业大学机电工程学院;
- 论文关键词：20Mn2圆环链 ; 中频热处理 ; 力学性能 ; 晶粒细化
- 英文论文关键词：20Mn2 ring chain ; Medium frequency heat treatment ; Microstructure ; Mechanical property ; Refining grain
- 会议召开时间：2016-07-19
- 会议录名称：第十五届全国金相与显微分析学术年会论文集
- 语种：中文
- 分类号：TG142.1;TG161
- 学会代码：EGTA
- 会议名称：第十五届全国金相与显微分析学术年会
- 会议地点：中国青海西宁
- 主办单位：中国体视学学会金相与显微分析分会
- 学会名称：中国体视学学会
- 页数：6
- 文件大小：3275k
- 原文格式：O
- 会议级别：全国
摘要
研究了20Mn2钢在两种不同热处理方式下的组织和力学性能,分析表明常规热处理的最优参数为淬火890℃保温20 min、回火450℃保温30 min;中频热处理的最优参数为淬火温度950℃、回火温度550℃。采用光学显微镜、扫描电镜和洛氏硬度计分析试验材料的组织特征,通过多功能拉力试验机检测热处理后钢材的力学性能。试验结果显示,中频热处理后钢材的组织和力学性能均优于常规热处理,其主要原因是中频热处理的加热模式使得钢材的组织晶粒更加细化。如果在中频热处理之前再进行一次正火处理来细化晶粒,还可以进一步提高20Mn2钢的力学性能。
Microstructure and mechanical properties of 20Mn2 steel after two different heat treatments were studied and got the optimal parameters under these two conditions.The results show that for conventional heat treatment,the optimal parameters are quenching at 890℃ for 20 min and tempering at 450 ℃ for 30 min.While for medium frequency heat treatment,the optimal parameters are quenching at 950 ℃ and tempering at 550 ℃.Microstructure characteristics of the steel were analyzed by optical microscopy,scanning electron microscopy and Rockwell hardness tester and the mechanical properties of 20Mn2 steel after heat treatments were studied by utilized multifunctional pull tester.The results show that after medium frequency heat treatment,both the microstructure and mechanical properties of the 20Mn2 steel are better than those of after conventional heat treatment.This is mainly because the medium frequency heat treatment can refine the structural grain.If 20Mn2 steel is heat treated by normalizing before medium frequency heating,the mechanical properties of the 20Mn2 steel can be further improved.
Microstructure and mechanical properties of 20Mn2 steel after two different heat treatments were studied and got the optimal parameters under these two conditions.The results show that for conventional heat treatment,the optimal parameters are quenching at 890℃ for 20 min and tempering at 450 ℃ for 30 min.While for medium frequency heat treatment,the optimal parameters are quenching at 950 ℃ and tempering at 550 ℃.Microstructure characteristics of the steel were analyzed by optical microscopy,scanning electron microscopy and Rockwell hardness tester and the mechanical properties of 20Mn2 steel after heat treatments were studied by utilized multifunctional pull tester.The results show that after medium frequency heat treatment,both the microstructure and mechanical properties of the 20Mn2 steel are better than those of after conventional heat treatment.This is mainly because the medium frequency heat treatment can refine the structural grain.If 20Mn2 steel is heat treated by normalizing before medium frequency heating,the mechanical properties of the 20Mn2 steel can be further improved.
引文
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[2]FENG Ping-yang.Comparison of ferrite refinement mechanisms by different processing schedules in 08 and20mn steels[J].Journal of University of Science and Technology Bejing,2001,(3):26-36
[3]Clover D,Kinsella B,Pejcic B,et al.The influence of microslructure on the corrosion rate of various carbon steels[J].Journal of Applied Electrochemistry,2005,35:139-149.
[4]王维喜,马瑞勇,武兴旺,等.矿用高强度链条及其热处理的研究进展[J].金属热处理,2009,34(8):102-104.WANG Wei-xi,MA Rui-yong,WU Xing-wang,et al.Research progress of high-tensile round link chains for mining and its heat treatment[J].Heat Treatment of Metals,2009,34(8):102-104.
[5]Parsons Chain Company Limited.Alloy steel composition and chain products fabricated in such alloy steel United States,6,146,583[PJ.2000-11-14.
[6]孙维连.工程材料[M].北京:中国农业大学出版社,2005.
[7]王敏,郭淑兰,刘学东.等温处理对20Mn2SiVB钢的组织与力学性能的影响[J].热加工工艺2010,39(16):161-165.WANG Min,GUO Shu-lan,LIU Xue-dong.Effect of isothermal treatment on microstructure and mechanical properties of 20Mn2SiVB steel[J].Hot working Technology,2010,39(16):161-165.
[8]Wang L,Du WC,Wang H,Wu H.Fuzzy self-tuning PID control of the operation temperatures in a two-staged membrane separation process.Journal of Natural Gas Chemistry,2008,17(4):409-414.
[9]技工学校机械类通用教材编审委员会编《热处理工艺学》[M].上海:机械工业出版社,1980.8.
[10]王冠,赵慧丽,郑喜平,等.超声波淬火对20Mn2A钢力学性能的影响[J].热处理技术.2014,43(20):132-134.WANG Guan,ZHAO Hui-li,ZHENG Xi-ping,et al.Effect of ultrasonic on mechanical properties of 20Mn2A steel[J].Hot Working Technology,2014,43(20):132-134.
[11]Wang G M,Cambell S J.Synthesis and structural evolution of tungstencarbide prepared by ball milling[J].J.Mater.Sci,1997,32(6):1461-1467.
[12]Parsons Chain Company Limited Alloy steel composition and chain products fabricated in such alloy steel United States,6,146,583[P].2000-11-14
[13]张立强,包燕平,王敏,等.20Mn2钢质量缺陷成因分析[J].铸造技术,2013,34(10):1302-1305.ZHANG Li-qiang,BAO Yan-ping,WANG Min,et al.Cause analysis on quality defects in 20Mn2 steel[J].Foundry Technology,2013,34(10):1302-1305.
[14]霍颜秋,张梦贤,王海波,等.低碳20Mn2SiVB钢贝氏体相变及其TRIP效应[J].金属热处理,2014,39(10):72-75.HUO Yan-qiu,ZHANG Meng-xian,WANG Hai-bo,et al.Bainite transformation and TRIP effect in low carbon 20Mn2SiVB steel[J].Heat Treatment of Metals,2014,39(10):72-75.