锻压技术

15CrMnMoVA钢Φ610 mm电渣锭锻造表面裂纹及工艺改进

英文标题：Forging surface crack and process improvement on 15CrMnMoVA steel Φ610 mm electroslag ingot

作者：王飞

分类号：

出版年,卷(期):页码：2022,47(3):34-38

摘要：

利用光学显微镜（OM）、扫描电子显微镜（SEM）等研究了15CrMnMoVA钢Φ610 mm钢锭锻造开坯过程中圆坯料表面裂纹产生的根本原因。结果表明：钢锭在锻造加热前，锭的中上部附近已经存在微小裂纹；锻造开坯前，钢锭在加热炉中长时间处于加热均温阶段，微小裂纹附近严重脱碳及富Cu相析出的综合作用恶化了钢锭在开坯过程中钢锭表面的热塑性；Φ610 mm钢锭开坯过程中钢锭中上部附近出现了明显的横向热裂纹，裂纹两侧附近脱碳严重，并且在热裂纹附近的晶界上出现了液膜状富Cu相。通过降低母电极中的Cu含量及延长电极在电渣重熔后的炉冷时间，有效地消除了Φ610 mm钢锭在锻造开坯过程中圆坯料的表面裂纹，提高了成品棒材的表面质量。

The root cause of round billet surface crack formed in forging and billeting process of 15CrMnMoVA steel Φ610 mm steel ingot was studied by means of optical microscope(OM) and scanning electron microscope(SEM). The results show that there are micro-cracks near the middle and upper part of the ingot before forging and heating, and the combined effect of severe decarburization and Cu-rich phase precipitation near micro-cracks deteriorates the thermoplasticity of the steel ingot surface during the billeting process of the steel ingot when the steel ingot is in the heating homogenization stage for a long time in the heating furnace before forging and billeting. Furthermore, the obvious transverse hot cracks appear near the middle and upper part of the steel ingot during the billeting process of Φ610 mm steel ingot, the decarburization near both sides of the crack is serious, and the liquid film Cu-rich phase appears on the grain boundary near the hot crack. Therefore, by reducing the content of Cu in the mother electrode and prolonging the furnace cooling time of the electrode after electroslag remelting, the surface cracks of the round billet during the forging and billeting process of Φ610 mm steel ingot are effectively eliminated, and the surface quality of the finished bar is improved.

基金项目：

王飞（1989-），男，硕士，主任研究员 E-mail：w.fwdd@163.com

参考文献：

[1]景启明, 韩维新,潘浩.热处理对15CrMnMoVA钢力学性能的影响[J].材料热处理学报,2013,34(7):89-93.

Jing Q M, Han W X, Pan H. Effect of heat treatment on mechanical properties of 15CrMnMoVA steel[J]. Transactions of Materials and Heat Treatment, 2013,34(7):89-93.

[2]赵承杰, 孟庆昌,刘兴秋, 等.热处理制度对15CrMnMoVE钢力学性能的影响[J].物理测试,1996(2):5-8，21.

Zhao C J, Meng Q C, Liu X Q, et al. Effect of heat treatment on mechanical properties of 15CrMnMoVE steel[J]. Physics Examination and Testing, 1996(2):5-8，21.

[3]李娜. 铜在钢中的作用综述[J].辽宁科技大学学报,2011,34(2):157-162.

Li N. Summary of the role of copper in steel[J]. Journal of University of Science and Technology,2011,34(2):157-162.

[4]李丽, 苏航,杨才福, 等. 含铜钢表面热氧化缺陷及解决办法[A]. 2005年全国计算材料、模拟与图像分析学术会议论文集[C].秦皇岛，2005.

Li L, Su H, Yang C F, et al. Thermal oxidation defects on the surface of copper-containing steel and its solution[A]. Proceedings of the 2005 National Conference on Computational Materials, Simulation and Image Analysis[C]. Qinghuangdao，2005.

[5]江学强, 吉卫.铜脆产生原因及防止措施[J].四川兵工学报,2006,(5):48-50.

Jiang X Q, Ji W. Copper brittle causes and prevention measures[J]. Journal of Ordnance Equipment Engineering, 2006,(5):48-50.

[6]程里. 模锻钢件锻造生产中的铜脆龟裂分析及预防[J].热加工工艺,2006,35(1):58-60.

Cheng L. Die forging steel forging production of copper brittle crack analysis and prevention[J]. Hot Working Technology, 2006,35(1):58-60.

[7]李娜, 王淞彦,白兵.高温下含铜钢的氧化行为[J].辽宁科技大学学报,2017,40(1):1-5.

Li N, Wang S Y, Bai B.Oxidation behavior of copper-containing steel at high temperature[J]. Journal of University of Science and Technology, 2017,40(1):1-5.

[8]马涛, 杨桂宇,邓美乐,等.含铜钢的研究现状及展望[J].热加工工艺,2017,46(2):36-39.

Ma T, Yang J Y, Deng M L, et al. Research status and prospect of copper-containing steel[J]. Hot Working Technology, 2017,46(2):36-39.

[9]杨小平, 李长荣.残余Cu对钢材热加工性能的危害及其抑制措施[J].热加工工艺,2009,38(10):155-157.

Yang X P, Li C R. Residual Cu and its inhibition to the harm of steel hot working performance measures[J]. Hot Working Technology, 2009,38(10):155-157.

[10]赵吉庆, 杨钢,包汉生,等.AMS 6308钢大棒材锻造开裂原因分析[J].热加工工艺,2017,46(3):255-257,260.

Zhao J Q, Yang G, Bao H S, et al. AMS6308 steel billet forging crack reason analysis[J]. Hot Working Technology, 2017,46(3):255-257,260.

[11]万兰凤, 张晖,黄绪传, 等.合金元素对含铜钢表面高温氧化后铜元素富集和热轧板质量的影响[J].机械工程材料,2011,35(4):28-31.

Wan L F, Zhang H, Huang X C, et al. After the alloy elements on surface oxidation of copper-bearing steel copper enrichment and quality of hot rolled plate[J]. Materials for Mechanical Engineering, 2011,35(4):28-31.

[12]杨才福, 刘翊之,柴锋, 等.高强度含铜钢奥氏体连续冷却转变产物的强韧性[J]. 工程科学学报,2014,36(4):438-445.

Yang C F, Liu Y Z, Chai F, et al. Strength and toughness of austenite continuous cooling transformation products of high strength copper-bearing steel[J]. Chinese Journal of Engineering, 2014,36(4):438-445.

服务与反馈：

【文章下载】【加入收藏】