Microstructure and Properties of Hot Rolled X65 Pipeline Steel Strip Produced by Tangsteel
The microstructure and mechanical properties were studied on X65 pipeline steel produced by Tangsteel using methods of optical microscope, SEM, TEM and tensile tests and so on. Impurities in the steel and impact toughness were researched by experiments. The results show that microstructure of X65 pipeline steel strips is fine and more homogeneous, the grains of ferrite which is about 6μm are acicular. Finer M/A island structure and deteriorated pearlite are dispersed in the lathing of acicular ferrite. The impurities in steel are mainly sphericity, subspheticity of silicates and sulfuret, and the size of most impurities is smaller than 4μm. there was second phase partical precipitating in the ferrite grain or on the ferrite boundary of finished strip. The strength and toughness of X65 pipeline steel strips are high because of the fine microstructure and low quantity of deleterious components and impurities.
X65 pipeline steel microstructure strength elongation rate impact toughness
FENG Yun-li WAN De-cheng DING Run-jiang CHEN Li-bin
Metal Material Engineering Department, Hebei Polytechnic University, Tangshan Hebei 063009, China Technologic Centre, Tangshan Iron and Steel Co., Ltd., Tangshan 063016, Hebei, China
国际会议
2009年薄板坯连铸连轧国际研讨会(TSCR 2009)(2009 International Symposium on Thin Slab Casting and Rolling)
南京
英文
435-440
2009-05-13（万方平台首次上网日期，不代表论文的发表时间）