ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2016, Vol. 37 ›› Issue (5): 40-44.

• 工艺技术 • 上一篇    下一篇

冷却速度对Φ13 mm SWRH82B线材组织性能影响及控冷工艺优化实践

秦凤婷1,王红伟1,董战利2,宋玉安1   

  1. 1. 济源职业技术学院冶金化工系,济源 459000 ;
    2. 河南济源钢铁(集团)公司,济源 459000;
  • 收稿日期:2016-05-30 出版日期:2016-10-01 发布日期:2022-07-30
  • 作者简介:秦凤婷(1983-),女,硕士(2008年东北大学),讲师,2006年中原工学院(本科)毕业,钢铁冶金技术研究。

Effect of Cooling Rate on Structure and Properties of Φ13 mm SWRH82B Rod Coil and Optimized Practice of Controlled Cooling Process

Qin Fengting1 , Wang Hongwei1 , Dong Zhanli2 , Song Yuan1   

  1. 1. Department of Metallurgy and Chemical Industry, Jiyuan Vocational Technical College, Jiyuan 459000;
    2. Henan Jiyuan Iron and Steel ( Group) Co Ltd, Jiyuan 459000
  • Received:2016-05-30 Published:2016-10-01 Online:2022-07-30

摘要: 采用热模拟试验机测定了SWRH82B钢(/%:0.80C,0.84Mn0.22Si0.013P0.008S0.32Cr)的相变点和连续冷却转变(CCT)曲线通过金相显微镜、SEM、TEM及力学性能测试分析了冷却速度(1~25℃/s)对SWRH82B线材相变组织、珠光体片层间距和力学性能的影响得到了最佳冷却速度为8~10℃/s;通过150 mm×150 mm SWRH82B钢铸坯轧成Φ13 mm盘条后风冷4组Z1~Z13辊道速度(0.8~1.25 m/s1.0~1.45 m/s1.05~1.50 m/s1.10~1.55 m/s)和冷却速度(8.9,9.5,10.4,11.2℃/s)进行了生产试验得出在斯泰尔摩风冷线上的获得最佳冷却速度8~10℃/s首段辊道速度应为0.8~1.0 m/s可达到用户要求的指标:时效后抗拉强度≥1130MPa和断面收缩率≥30%索氏体率≥80%表面脱碳深度≤1.5%D(D-线材直径)。

关键词: Φ13 mm线材, SWRH82B钢, 控冷工艺, 相变组织, 首段辊道速度, 力学性能

Abstract: The phase transformation point and continuous cooling transformation ( CCT) curves of SWRH82B steel (/% : 0.80C, 0.84Mn, 0.22Si, 0.013P, 0.008S, 0.32Cr) are measured by thermal simulation machine, and the effect of cooling rate ( 1~25℃/s) on phase transformation structure, pearlite interlamellar spacing and mechanical properties of SWRH82B rod coil is analyzed by optical microscope, SEM, TEM and mechanical testing to get the optimum cooling rate 8~10℃/s. The commercial production test is carried out by 150 mm x 150 mm billet of SWRH82B steel rolled to Φ13 mm rod coil and fan cooling with four Z1~Z13 cooling roller speed (0.8~1.25 m/s, 1.0~1.45 m/s, 1.05~1.50 m/s and 1.10~1.55 m/s) and cooling rate (8.9, 9.5 , 10.4 and 11.2 ℃/s) , and it is obtained that in order to get optimum cooling rate 8 ~ 10 ℃/s at Stelmor cooling line the roller speed of first section should be 0.8~1.0 m/s to come up to the required index of user: aged tensile strength 1130 MPa and reduction of area ≥30% , sorbitic structure ratio ≥80% and depth of surface decarburization ≤1.5%D (D- diameter of rod coil).

Key words: Φ13 mm Rod Coil, SWRH82B Steel, Controlling Cooling Process, Phase Transformation Structure, Roller Speed of First Section, Mechanical Properties