李忠之, 杨庆敏, 俞亚杰, 等. 50 t EAF-AOD-LF-VD-CC-轧制高碳不锈钢9Cr18盘条的工艺实践[J]. 特殊钢, 2014,35(5):37-39.
李忠之, 杨庆敏, 俞亚杰, et al. Process Practice of Rod Coil of High Carbon Stainless Steel 9Cr18 Produced by 50 t EAF-AOD-LF-VD-CC-Rolling Flow Sheet[J]. Special Steel, 2014, 35(5): 37-39.
李忠之, 杨庆敏, 俞亚杰, 等. 50 t EAF-AOD-LF-VD-CC-轧制高碳不锈钢9Cr18盘条的工艺实践[J]. 特殊钢, 2014,35(5):37-39.DOI:
李忠之, 杨庆敏, 俞亚杰, et al. Process Practice of Rod Coil of High Carbon Stainless Steel 9Cr18 Produced by 50 t EAF-AOD-LF-VD-CC-Rolling Flow Sheet[J]. Special Steel, 2014, 35(5): 37-39.DOI:
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。
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%.