网站首页期刊简介编委会过刊目录投稿指南广告合作征订与发行联系我们English
59 mm×100 mm矩形52CrMoV4弹簧扁钢轧制工艺及失效分析
英文标题:Rolling process and failure analysis of 59 mm×100 mm rectangular 52CrMoV4 spring flat steel
作者:袁林 罗景贤 陈阳 张群琥 刘兵 
单位:(湖南华菱湘潭钢铁有限公司 湖南 湘潭 441200) 
关键词:52CrMoV4弹簧扁钢 疲劳寿命 断裂 夹杂物 脱碳层 
分类号:TG142.41;TG335.5+7
出版年,卷(期):页码:2024,49(5):109-114
摘要:

 针对59 mm×100 mm矩形52CrMoV4弹簧扁钢易扭转、尺寸不稳定的问题,进行了孔型设计和轧制工艺优化,并采用化学成分分析、显微组织分析、力学性能试验等方法对发生断裂的弹簧扁钢的失效原因进行了分析。结果表明:材料的化学成分符合要求;力学性能指标中,抗拉强度为1511/1494 MPa、屈服强度为1362/1344 MPa、断后伸长率为11.5%/9.0%、断面收缩率为37.0%/36.5%、表面硬度在42.4~42.9 HRC之间分布;表面脱碳层深度为0.24~0.28 mm,奥氏体晶粒度为7.5~8.0级;未发现大型夹杂物等冶金缺陷;材料经热处理后的主要基体组织为回火索氏体+少量贝氏体;断口起源于表面,疲劳源区域表面存在明显压痕,而其他位置未发现压痕,表明表面压痕是导致材料疲劳寿命降低的直接原因,瞬断区微观形貌为沿晶+撕裂韧窝。

 

 For the problems of easy torsion and unstable size of 59 mm×100 mm rectangular 52CrMoV4 spring flat steel, the design of hole pattern and the optimization of rolling process were conducted, and the failure cause of broken spring flat steel was analyzed by the methods of chemical composition analysis, microstructure analysis and mechanical performance test. The results show that the chemical composition of material meets the requirements. In the mechanical performance indicators, the tensile strength is 1511/1494 MPa, the yield strength is 1362/1344 MPa, the elongation after fracture is 11.5%/9.0%, the reduction of area is 37.0%/36.5%, the surface hardness is distributed between 42.4 and 42.9 HRC, the depth of surface decarburization layer is 0.24-0.28 mm, and the austenite grain size is 7.5-8.0 grades. No metallurgical defects such as large inclusions are found, and the main matrix structure of material after heat treatment is tempered martensite+a small amount of bainite. The fracture originates from the surface, and there are obvious indentations on the surface of fatigue source area, while no indentations are found in other positions. Therefore, the surface indentations are the direct cause for the fatigue life of material,and the microstructure of instantaneous fracture zone is intergranular+tearing dimples.

 
基金项目:
作者简介:
作者简介:袁林(1994-),男,硕士,工程师 E-mail:767238701@qq.com
参考文献:

 
[1]徐平伟,梁益龙,黄朝文.奥氏体晶粒对52CrMoV4弹簧钢强韧性的影响
[J].材料热处理学报,2012,33(1):89-93.


 

Xu P W,Liang Y L,Huang C W.Effect of austenite grain size on strength and toughness of a spring steel 52CrMoV4
[J].Transactions of Materials and Heat Treatment,2012,33(1):89-93.

 


[2]王建新,张春辉.高强度与高韧性弹簧扁钢的产品开发
[J].新疆钢铁,2023,(3):1-3.

 

Wang J X,Zhang C H.Product development of high-strength and high toughness spring flat steel
[J].Xinjiang Iron and Steel,2023,(3):1-3.

 


[3]杨奇军,杨庚朝,刘建,等.52CrMoV4弹簧扁钢连铸坯内部裂纹产生机理及预防
[J].连铸,2023,(1):41-46.

 

Yang Q J,Yang G C,Liu J,et al.Mechanism and prevention of internal cracks in continuous casting billets of 52CrMoV4 spring flat steel
[J].Continuous Casting,2023,(1):41-46.

 


[4]焦力隆,侯现军,李绍杰,等.铁路机车用52CrMoV4弹簧失效分析
[J].河北冶金,2013,(5):64-66,36.

 

Jiao L L,Hou X J,Li S J,et al.Failure analysis for 52CrMoV4 spring used by locomotive
[J].Hebei Metallurgy,2013,(5):64-66,36.

 


[5]张江涛,李佳军,罗景贤,等.湘钢中小棒56×100.5平面矩形扁钢轧制工艺研究
[J].金属材料与冶金工程,2022,50(2):48-51,58.

 

Zhang J T,Li J J,Luo J X,et al.Research on rolling process of 56×100.5 planar rectangular flat steel for small and medium bars at Xianggang
[J].Metal Materials and Metallurgy Engineering,2022,50(2):48-51,58.

 


[6]李红星.弹簧扁钢半连续轧制工艺技术
[J].轧钢,2001,(1):28-30.

 

Li H X.Semi continuous rolling technology for spring flat steel
[J].Steel Rolling,2001,(1):28-30.

 


[7]ISO 683-14—2004,Heat-treatable steels, alloy steels and free-cutting steels.Part 14:Hot-rolled steels for quenched and tempered springs
[S].

 


[8]杨志钦.50CrVA弹簧钢断裂失效分析
[J].中国铸造装备与技术,2023,58(3):83-88.

 

Yang Z Q.Fracture failure analysis of 50CrVA spring steel
[J].China Foundry Machinery & Technology,2023,58(3):83-88.

 


[9]聂小龙,高加强,孟开仁,等.60Si2Mn弹簧钢的断裂失效分析
[J].金属热处理,2021,46(8):246-250.

 

Nie X L,Gao J Q,Meng K R,et al.Fracture failure analysis of 60Si2Mn spring steel
[J].Heat Treatment of Metals,2021,46(8):246-250.

 


[10]张志洋,崔慕春,王勇,等.60Si2MnA弹簧钢失效分析及工艺改进
[J].矿业装备,2019,(3):24-25.

 

Zhang Z Y,Cui M C,Wang Y,et al.Failure analysis and process improvement of 60Si2MnA spring steel
[J].Mining Equipment,2019,(3):24-25.

 


[11]侯环宇,黄艳新,田志强,等.弹簧钢52CrMoV4连续冷却相变的组织变化
[J].材料热处理学报,2016,37(9):129-132.

 

Hou H Y,Huang Y X,Tian Z Q,et al.Microstructure evolution of spring steel 52CrMoV4 during continuous cooling transformation
[J].Transactions of Materials and Heat Treatment,2016,37(9):129-132.

 


[12]黄伟.51CrV4弹簧钢高温变形行为及疲劳性能研究
[D].赣州:江西理工大学,2022.

 

Huang W.Research on High Temperature Deformation Behavior and Fatigue Performance of 51CrV4 Spring Steel
[D].Ganzhou:Jiangxi University of Science and Technology,2022.

 


[13]涂天权.汽车用超高强度弹簧钢的组织与性能研究
[D].西安:长安大学,2022.

 

Tu T Q.Study on the Structure and Properties of Ultra High Strength Spring Steel for Automobile
[D].Xi′an:Chang′an University,2022.

 


[14]万正东,彭文屹,杨湘杰,等.60Si2Mn弹簧扁钢崩料断裂原因分析
[J].机械工程材料,2009,33(12):94-97.

 

Wan Z D,Peng W Q,Yang X J,et al.Reason Analysis for Avalanche Fracture of 60Si2Mn Spring Flat Steel
[J].Materials for Mechanical Engineering,2009,33(12):94-97.

 
服务与反馈:
文章下载】【加入收藏
《锻压技术》编辑部版权所有

中国机械工业联合会主管  中国机械总院集团北京机电研究所有限公司 中国机械工程学会主办
联系地址:北京市海淀区学清路18号 邮编:100083
电话:+86-010-82415085 传真:+86-010-62920652
E-mail: fst@263.net(稿件) dyjsjournal@163.com(广告)
京ICP备07007000号-9