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 ›› 2014, Vol. 35 ›› Issue (5): 37-39.

• 工艺技术 • 上一篇    下一篇

50 t EAF-AOD-LF-VD-CC-轧制高碳不锈钢9Cr18盘条的工艺实践

李忠之,杨庆敏,俞亚杰,于全功,聂显飞,周一玲   

  1. 东北特殊钢集团有限责任公司特钢研究院,大连 116105
  • 收稿日期:2014-04-16 出版日期:2014-10-01 发布日期:2022-09-01
  • 作者简介:李忠之(1968-),男,硕士(中南工业大学),副总工程师,1991 年中南工业大学(本科)毕业,特殊钢科研和新产品研制。

Process Practice of Rod Coil of High Carbon Stainless Steel 9Cr18 Produced by 50 t EAF-AOD-LF-VD-CC-Rolling Flow Sheet

Li Zhongzhi , Yang Qingmin , Yu Yajie , Yu Quangong , Nie Xianfei  ,  Zhou Yiling   

  1. Research Institute for Special Steel, Dongbei Special Steel Group Co Ltd, Dalian 116105
  • Received:2014-04-16 Published:2014-10-01 Online:2022-09-01

摘要: 采用50 t EAF-AOD-LF-VD-150 mm×150 mm坯连铸-高速线材连轧工艺生产9Cr18钢(/%:0.95C,0.35Si,0.37Mn,0.032P,0.002S,17.42Cr,0.01Mo)Φ5.5 mm盘条。通过控制[S]≤0.008%,添加0.05%稀土元素,连铸坯经1160℃高温扩散处理,Φ5.5 mm成品盘条采用860℃球化退火等工艺措施,检验结果表明,盘条中心和一般疏松,以及偏析均≤1.0级,共晶碳化物不均匀度1.0~2.0级,球化退火组织为球状珠光体+块状碳化物,抗拉强度750~780 MPa,伸长率20%~26%,具有良好的冷拔性能。

关键词: 9Cr18不锈钢, 150 mm x 150 mm连铸坯, 碳化物, 高温扩散处理, Φ5.5 mm盘条

Abstract: The Φ5.5 mm rod coil of steel 9Crl8 (/% : 0.95C, 0.35Si, 0.37Mn, 0.032P, 0.002S, 17.42Cr,0.01Mo) is produced by 50t EAF-AOD- LF- VD- 150 mm x 150 mm billet concasting- high speed rod rolling process. With using the process measures including controlling [S] ≤ 0.008% , adding 0.05% RE elements, concasting billet high-temperature diffusion treating at 1160 ℃ and Φ5.5 mm rod coil products spheroidizing annealing at 860 ℃, the examination results show that of rod coil the rating o£ center and general porosity, and segregation are all ≤ 1.0, the rating of non-uniformity of eutectic carbide is 1.0-2.0, the spheroidizing annealing structure of rod is spheroidal pearlite + massive carbide, the rod has nice cold-drawing performance with tensile strength 750-780 MPa and elongation 20%-26%.

Key words: Stainless Steel 9Cr18, 150 mm x 150 mm Concasting Billet, Carbide, High Temperature Diffusion Treatment, Φ5.5 mm Rod Coil