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

Process Practice of Rod Coil of High Carbon Stainless Steel 9Cr18Produced by 50 t EAF-AOD-LF-VD-CC-Rolling Flow Sheet

作　　者：李忠之 杨庆敏[1] 俞亚杰 于全功[1] 聂显飞 周一玲[1] 

机构地区：[1]东北特殊钢集团有限责任公司特钢研究院,大连116105

出　　处：《特殊钢》2014年第5期37-39,共3页Special Steel

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1 160℃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。The qb5.5 mm rod coil of steel 9Cr18 （/% ： 0. 95C, 0. 35Si, 0. 37Mn, 0. 032P, 0. 002S, 17.42Cr, 0. 01Mo） is produced by 50t EAF-AOD- LF- VD- 150 mm × 150 mm billet concasting- high speed rod rolling process. With using the process measures including controlling [ S]≤0. 008% , adding 0. 05% RE elements, eoncasting billet high-tem- perature diffusion treating at 1 160 ℃ and qb5.5 mm rod coil products spheroidizing annealing at 860 ℃, the examination results show that of rod coil the rating of center and general porosity, and segregation are all ~〈 1.0, the rating of non-uni- formity of eutectic carbide is 1.0 - 2.0, the spheroidizing annealing structure of rod is spheroidal pearlite ＋ massive car- bide, the rod has nice cold-drawing performance with tensile strength 750 - 780 MPa and elongation 20% - 26%.

关 键 词：9Cr18不锈钢 150 mm×150mm连铸坯 碳化物 高温扩散处理 Φ5.5 mm盘条 

分 类 号：TG335[金属学及工艺—金属压力加工]