Research and development of low-cost X80 pipeline steel
WANG Zhi-yong1，LI Shao-po2，LI Qun1，CHEN Tie-qiang1，WANG Xue-song1
（1. Rolling Business Department, Qinhuangdao Shouqin Metal Materials Co.， Ltd.， Qinhuangdao 066000， Hebei，China 2. Plate Technology Department, Shougang Research Institute of Technology， Beijing 100042， China
Abstract：An overview of reduced production technology for X80 plates was introduced，including heating process， controlled rolling and controlled cooling process. The results showed that by controlling the heating temperature below1180℃，the austenite grain can be controled less than 80 μm. By increasing the reduction rate at the last one pass during rough rolling to 20% or more，the center austenite grain can be refined completely. Eventually the microstructure of ultra-fine lath bainite and acicular ferrite was obtained by decreasing the finish cooling temperature and increasing the cooling rate. After applying the JCOE process to make the pipe，the yield strength of X80 plates raised，which can provide a possibility to reduce product cost. At present，a batch production of low cost X80 plate without molybdenum alloy was achieved in the company.
王志勇，李少坡，李群，谌铁强，王雪松. 经济型X80管线钢的研制开发[J]. 中国冶金, 2016, 26(11): 64-68.
WANG Zhi-yong，LI Shao-po，LI Qun，CHEN Tie-qiang，WANG Xue-song. Research and development of low-cost X80 pipeline steel. China Metallurgy, 2016, 26(11): 64-68.
2016, Vol. 26 
