刘涛,叶知春,刘洪伟,周威佳

• 1:哈尔滨工业大学(威海)汽车工程学院
• 2:哈尔滨工业大学(威海)材料科学与工程学院

摘要(Abstract)：

通过拉伸和撕裂试验及SEM、断口和EBSD晶粒观察,研究了不同回火温度对22MnB5钢力学性能、显微组织、断口形貌及晶粒尺寸的影响。结果表明:在420~720℃范围内,淬火试样随回火温度升高,强度降低,韧性增加,吸能性能提升;单位面积裂纹形核功与回火温度线性无关。淬火试样420℃回火后,部分马氏体开始回复,析出碳化物;温度升高至620℃时,马氏体消失,形成铁素体,碳化物长大。原始试样断口韧窝大且深,淬火试样断口出现大量解理面;420℃回火后断口形貌为韧窝和解理面,620℃回火后断口形貌为细小均匀的韧窝。原始试样淬火后晶粒变小,最大值从10.246μm减小至2.934μm,回火后尺寸峰值向右移动,晶粒长大,出现少量直径小于1μm的晶粒。

关键词(KeyWords)： 22MnB5钢;显微组织;断口形貌;EBSD

Abstract:

Keywords:

基金项目(Foundation): 山东省重点研发计划(2015GGX103008)

作者(Author): 刘涛,叶知春,刘洪伟,周威佳

DOI: 10.13289/j.issn.1009-6264.2017.04.019

参考文献(References)：

• [1]桂中祥,张宜生,王子健.汽车超高强钢热冲压成形新工艺——选择性冷却[J].热加工工艺,2013,42(1):108-113.GUI Zhong-xiang,ZHANG Yi-sheng,WANG Zi-jian.A new technology of hot stamping ultra-high strength automobile-selective cooling[J].Hot Working Technology,2013,42(1):108-113.
• [2]Marion Merklein,Michael Wieland,Michael Lechner.Hot stamping of boron steel sheets with tailored properties:A review[J].Journal of Materials Processing Technology,2016,228:11-24.
• [3]WANG Z J,LIU P X,XU Y.Hot stamping of high strength steel with tailored properties by two methods[J].Procedia Engineering,2014,81:1725-1730.
• [4]周清跃.回火工艺对贝氏体轨钢组织性能的影响研究[D].北京:铁道科学研究院,2004.
• [5]Phetlam P,Uthaisangsuk V.Microstructure based flow stress modeling for quenched and tempered low alloy steel[J].Materials&Design,2015,82:189-199.
• [6]ZHANG Sheng-hua,WANG Pei,LI Dian-zhong.Investigation of the evolution of retained austenite in Fe-13%Cr-4%Ni martensitic stainless steel during intercritical tempering[J].Materials and Design,2015,84:385-394.
• [7]王猛,孙明雪,李成刚,等.淬火和回火工艺对3.5Ni钢组织和力学性能的影响[J].材料热处理学报,2015,36(3):83-89.WANG Meng,SUN Ming-xue,LI Cheng-gang,et al.Effect of quenching and tempering process on microstructure and mechanical properties of 3.5Ni steel[J].Transactions of Materials and Heat Treatment,2015,36(3):83-89.
• [8]盈亮.高强度钢热冲压关键工艺试验研究与应用[D].大连:大连理工大学,2013.
• [9]吴金辉,王树人,李云龙,等.X70高钢级大壁厚管线钢管落锤撕裂试验的影响因素[J].理化检验(物理分册),2011,42(2):85-87.WU Jin-hui,WANG Shu-ren,LI Yun-long,et al.Influence factors of DWTT for high grade and thick wall X70 linepipe[J].Physical Testing and Chemical Analysis(Part A:Physical Testing),2011,42(7):85-87.
• [10]王立军,蔡庆伍,武会宾,等.回火温度对1500MPa级直接淬火钢组织与性能的影响[J].北京科技大学学报,2010,32(9):1150-1162.WANG Li-jun,CAI Qing-wu,WU Hui-bin,et al.Effects of tempering temperature on the microstructure and mechanical properties of 1500MPa grade steel directly quenched[J].Journal of University of Science and Technology Beijing,2010,32(9):1150-1162.
• [11]程俊业,赵爱民,陈银莉,等.回火温度对淬火后30Mn B5热成形钢组织与性能影响[J].北京科技大学学报,2013,35(9):1150-1157.CHENG Jun-ye,ZHAO Ai-min,CHEN Yin-li,et al.Effect of tempering temperature on the microstructure and mechanical properties of 30Mn B5 hot stamping steel after quenching[J].Journal of University of Science and Technology Beijing,2013,35(9):1150-1157.
• [12]张小立,庄传晶,吉玲康,等.EBSD及其在钢铁研究领域中的应用[J].材料导报,2006,20(11):96-99.ZHANG Xiao-li,ZHUANG Chuan-jing,JI Ling-kang,et al.EBSD and its application in steel research[J].Materials Review,2006,20(11):96-99.
• [13]王申存,吴益文,华沂,等.20Mn Cr5钢中马氏体回火的EBSD研究[J].材料热处理学报,2011,32(1):43-48.WANG Shen-cun,WU Yi-wen,HUA Yi,et al.Investigation of tempered martensite in 20Mn Cr5 steel by EBSD[J].Transactions of Materials and Heat Treatment,2011,32(1):43-48.

文章评论(Comment)：