|
|
|
| Effect of non-calcium treatment on inclusions in high grade case hardening steel |
| YANG Guang-wei1, CHEN Zhao-ping1, LIU Xiang-chun2 |
1. Baosteel Central Research Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201999, China;
2. Tube, Pipe and Bar Business Unit, Baoshan Iron and Steel Co., Ltd., Shanghai 201999, China |
|
|
|
|
Abstract Inclusions in tundish with and without calcium treatment are studied by thermodynamic calculations and industrial trials for SCr420H gear steel. It is found that the inclusion amount without calcium treatment is lower than that with calcium treatment. Inclusions without calcium treatment are mainly angular magnesia-alumina spinel, while those with calcium treatment are mainly spherical Al2O3-CaO-MgO and CaS composites. After optimizing the process, the number of spinel inclusions in tundish without calcium treatment was greatly reduced, and the problems of nozzle blockage and B-type inclusions were solved. The results of inclusion rating for round steel without calcium treatment are as follows: Type A ≤ 0.5, Type B≤ 0.5, Type C=0, Type D (thin)≤ 1.0, Type D (heavy)≤ 0.5, and Type Ds ≤ 1.0.
|
|
Received: 28 June 2019
|
|
|
|
[1] 杨光维,陈兆平,柳向椿. 高等级齿轮钢夹杂物控制技术研究[J]. 炼钢, 2019, 35(1): 61.(YANG Guang-wei, CHEN Zhao-ping, LIU Xiang-chun. Research on control technology of inclusions in case hardening steel[J].Steelmaking,2019, 35(1): 61.)
[2] 曾志崎,杨乾坤,艾克南,等. 49MnVS非调质钢水口堵塞原因分析[J]. 钢铁,2019,54(1):43.(ZENG Zhi-qi,YANG Qian-kun,AI Ke-nan,et al. Analysis on nozzle clogging of 49MnVS steel during production[J].Iron and Steel,2019,54(1):43.)
[3] 唐德池,张宏艳,吉立鹏,等. 钙处理车轮钢洁净度[J]. 钢铁,2018,53(4):37.(TANG De-chi,ZHANG Hong-yan,JI Li-peng,et al. Cleanliness of calcium-treated wheel steel[J]. Iron and Steel, 2018, 53(4): 37.)
[4] 彭开玉,刘洋,张立峰. 持续氧化对钢水钙处理过程中夹杂物的影响[J]. 中国冶金, 2018, 28(3): 16. (PENG Kai-yu,LIU Yang,ZHANG Li-feng. Effect of continuous reoxidation on inclusions in molten steel during calcium treatment[J]. China Metallurgy, 2018, 28(3): 16.)
[5] 高胜亚,姜敏,侯泽旺,等. 钙处理对高碳铝镇静钢中夹杂物的影响[J]. 钢铁,2017,52(4):25.(GAO Sheng-ya,JIANG Min,HOU Ze-wang,et al. Effect of calciumtreatment on non-metallic inclusions in high carbon aluminum killed steel[J]. Iron and Steel, 2017, 52(4): 25.)
[6] 杨文,李超,张立峰,等. 优化钙处理工艺减少管线钢B类夹杂物[J]. 中国冶金, 2018, 28(s11): 70.(YANG Wen,LI Chao,ZHANG Li-feng,et al. Reduction of B type inclusions in pipeline steel by optimizing calcium treatment[J]. China Metallurgy, 2018, 28(s11): 70.)
[7] 侯全. 齿轮钢20CrMnTi可浇性研究及工艺改进实践[J]. 化工管理,2019(12):133.(HOU Quan.Study on the castability of 20CrMnTi gear steel and practice of technological improvement[J]. Chemical Enterprise Management,2019(12):133.)
[8] 张惠杰,王继晨,郭壮,等. 防止含硫FAS3420H齿轮钢连铸水口堵塞的工艺实践[J]. 辽宁科技学院学报,2014(3):8.(ZHANG Hui-jie,WANG Ji-chen,GUO Zhuang,et al.Preventing from Caster Nozzle Clogging by Sulfur-baring Gear Steel FAS3420H[J].Journal of Liaoning Institute of Science and Technology,2014(3):8.)
[9] 陈良,焦玉莉,黄优明. 20CrMnTiH齿轮钢可浇性研究与实践[J]. 中国冶金,2012,22(8):40.(CHEN Liang,JIAO Yu-li,HUANG You-ming.Research and practice on castability of 20CrMnTiH[J]. China Metallurgy,2012,22(8):40.)
[10] 林平,刘浏,王福利,等. 含硫齿轮钢20CrMnTiH1钙处理热力学和控制技术的研究[J]. 特殊钢,2010(2):1.(LIN Ping,LIU Liu,WANG Fu-li,et al.A Study on thermodynamics and control technology of calcium treatment for gear steel 20CrMnTiH1 containing sulfur[J].Special Steel,2010(2):1.)
[11] 姜英禹. 齿轮钢20CrMnTi水口堵塞原因分析与改进[J]. 新疆钢铁,2010(3):36.(JIANG Ying-yu. Causes analysis and amelioration of the nozzle jam of gear steel 20CrMnTi[J]. Xinjiang Iron and Steel,2010(3):36.)
[12] 韩志军,林平,刘浏,等. 20CrMnTiH1齿轮钢钙处理热力学[J]. 钢铁,2007,42(9):32.(HAN Zhi-jun, LIN Ping, LIU Liu, et al. Thermodynamics of calcium treatment for 20CrMnTiH1[J]. Iron and Steel, 2007, 42(9): 32.)
[13] 缪新德,徐国庆,陈情华,等. GCr15 钢中大颗粒夹杂(Ds类)的生成原因分析[J]. 炼钢,2007,23(2): 21.(MIAO Xin-de,XU Guo-qing,CHEN Qing-hua,et al. Analysis on cause to formation of large grain size inclusions(Ds type) in steel GCr15[J].Steelmaking,2007,23(2): 21.)
[14] 刘绍康,黄煌. 减少轴承钢和齿轮钢中大颗粒点状氧化物夹杂 (Ds) 的工艺实践[J]. 特殊钢,2008,29(5): 41.(LIU Shao-kang,HUANG Huang.Practice of process for decreasing large size globular oxides inclusion (Ds) in bearing steel and gear steel[J]. Special Steel,2008,29(5): 41.)
[15] 徐迎铁,陈兆平,杨宝权. 轴承钢 Ds 类大颗粒夹杂物研究[J]. 炼钢,2016,32(4): 49.(XU Ying-tie,CHEN Zhao-ping,YANG Bao-quan.Study of large size Ds type inclusions in bearing steel[J].Steelmaking,2016,32(4): 49.)
[16] 陈然,陈兆平,徐迎铁,等. 轴承钢夹杂物行为的原位观察[J]. 钢铁研究学报,2015,27(12): 48.(CHEN Ran,CHEN Zhao-ping,XU Ying-tie,et al.In-situ observation of behaviors of inclusions in bearing steel[J]. Journal of Iron and Steel Research,2015,27(12): 48.)
[17] 吴华杰,郭浩,魏崇一,等. 高品质轴承钢LF-VD过程非金属夹杂物演变规律[J]. 工程科学学报,2016(s1):206.(WU Hua-jie,GUO Hao,WEI Chong-yi,et al. Evolution rules of inclusions in high quality bearing steel produced by LF-VD process[J]. Chinese Journal of Engineering,2016(s1):206.) |
| [1] |
. Research and Solution of Nozzle Clogging Problem of Aluminum-Containing Electrical Steel in CSP Process[J]. , 2019, 44(4): 0-0. |
| [2] |
ZENG Zhi-qi，，YANG Qian-kun，，AI Ke-nan，，XIE Jian-bo，，LI Jian，，FU Jian-xun，. Analysis on nozzle clogging of 49MnVS steel during production[J]. Iron and Steel, 2019, 54(1): 43-48. |
| [3] |
LIU Yan-qiang，ZHANG Peng，HE Wen-yuan，YANG Xiao-shan，HUANG Cai-de，ZHAO Chang-liang. Transformation behavior and control of inclusions in X65 pipelinesteel during whole process[J]. Iron and Steel, 2018, 53(12): 44-53. |
| [4] |
GAO Sheng-ya，JIANG Min，HOU Ze-wang，WANG Xin-hua. Effect of calciumtreatment on non-metallic inclusions in high carbon aluminum killed steel[J]. Iron and Steel, 2017, 52(4): 25-30. |
| [5] |
ZHOU Xiu-li. Clogging research of submerged nozzle used the pulse current[J]. Chinese Journal of Iron and Steel, 2017, 42(2): 27-31. |
| [6] |
SHAN Qing-lin，WANG Bao-sheng，SHAN Wei，JIA Liu-bing，WANG Lei-chuan，HUANG Cai-de. Cause analysis and solving measures of the submerged nozzle clogging during the continuous casting of medium carbon low silicon aluminum killed steel[J]. Chinese Journal of Iron and Steel, 2016, 41(3): 14-18. |
|
|
|
|
2020, Vol. 55 
