1215MS低碳高硫易切削钢盘条冷拉拔前后组织及性能

材料导报

2021, Vol. 35

Issue (z2): 443-447

金属与金属基复合材料

1215MS低碳高硫易切削钢盘条冷拉拔前后组织及性能

郑江鹏¹, 初铭强¹, 温树文¹, 张书彦^1,2, 张鹏¹, 钟寿军³, 张志明³, 林晏民³, 胡寿浩⁴

1 东莞材料基因高等理工研究院,东莞 523808
2 松山湖材料实验室,东莞 523808
3 广东韶钢松山股份有限公司, 韶关 512123
4 东莞市万欣金属制品有限公司, 东莞 523560

The Microstructure and Properties of 1215MS Low Carbon and High Sulfur Free-cutting Steel Wire Rod Before and After Cold Drawing

ZHENG Jiangpeng¹, CHU Mingqiang¹, WEN Shuwen¹, ZHANG Shuyan^1,2, ZHANG Peng¹, ZHONG Shoujun³, ZHANG Zhiming³, LIN Yanmin³, HU Shouhao⁴

1 Centre for Excellence and Advanced Materials, Dongguan 523808, China
2 Songshan Lake Laboratory for Materials Science, Dongguan 523808, China
3 SGIS Songshan Co.,Ltd., Shaoguan 512123, China
4 Dongguan Wanxin Metal Products Co., Ltd., Dongguan 523560, China

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摘要采用金相显微镜、SEM、显微硬度、拉伸试验等测试手段,对1215MS低碳高硫易切削钢热轧盘条及由其冷拉拔制造的六角棒的组织及性能进行了分析。结果表明,1215MS热轧盘条主要组织为铁素体+少量珠光体,铁素体基体上分布着较多平行于轧制方向的条状MnS,盘条拉伸力学性能优良;拉拔成六角棒后,金相组织类型未发生明显变化,但横截面MnS密度增加,晶粒尺寸细化,较拉拔前减小1~1.5 μm,纵截面上晶粒和MnS沿着变形方向被拉长,形成带状组织;与盘条相比,六角棒抗拉强度增加了50%以上,硬度增加了近1倍,延伸率大幅降低85%,表现出强烈的加工硬化现象。

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	郑江鹏
	初铭强
	温树文
	张书彦
	张鹏
	钟寿军
	张志明
	林晏民
	胡寿浩

关键词: 1215MS 含硫易切削钢冷拔组织和性能

Abstract: The microstructure and mechanical properties of 1215MS low carbon and high sulfur free cutting steel hot rolled wire rod and hexagonal bar made from it by cold drawing were studied by means of metallographic microscope, SEM, micro-hardness and tensile test in this paper. The results showed that the microstructure of 1215MS hot-rolled wire rod is ferrite + a small amount of pearlite. The strip-shaped MnS inclusions are distributed in parallel to the rolling direction within the ferrite matrix, and the wire rod has excellent tensile mechanical properties. After being cold drawn into hexagonal bar, the metallographic structure type did not change significantly, but the density of the MnS inclusions in the cross section was increased, and the grain size was refined, which was reduced by 1—1.5 μm compared with that before drawing. The grains and MnS inclusions in the longitudinal section were elongated along the deformation direction, forming banded structures. Compared with the wire rod, the strength of the hexagonal bar was increased by more than 50%, the hardness was nearly doubled, while the elongation was decreased by 85% substantially, showing a strong work hardening phenomenon.

Key words: 1215MS sulfur free-cutting steel cold drawing microstructure and property

发布日期: 2021-12-09

ZTFLH:

TG356.3

基金资助: 广东省“珠江人才计划”引进创新创业团队资助项目(2016ZT06G025);广东省自然科学基金(2017B030306014)

通讯作者: jiangpeng.zheng@ceamat.com;shuyan.zhang@ceamat.com

作者简介: 郑江鹏,2006—2012年获得武汉大学材料成型及控制专业学士和机械工程专业硕士学位,在国内外学术期刊发表论文20余篇,授权国家发明专利10余项,主要研究方向为金属材料焊接、激光增材制造等。
张书彦,研究员,牛津大学工程学博士,主要从事材料工程等方面的研究。

引用本文:

郑江鹏, 初铭强, 温树文, 张书彦, 张鹏, 钟寿军, 张志明, 林晏民, 胡寿浩. 1215MS低碳高硫易切削钢盘条冷拉拔前后组织及性能[J]. 材料导报, 2021, 35(z2): 443-447.
ZHENG Jiangpeng, CHU Mingqiang, WEN Shuwen, ZHANG Shuyan, ZHANG Peng, ZHONG Shoujun, ZHANG Zhiming, LIN Yanmin, HU Shouhao. The Microstructure and Properties of 1215MS Low Carbon and High Sulfur Free-cutting Steel Wire Rod Before and After Cold Drawing. Materials Reports, 2021, 35(z2): 443-447.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2021/V35/Iz2/443

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