Development and production of hot rolled strip steel HP345 used for welded gas cylinders
LIU Yang-chun1,ZHANG Yun-he2,XU Bin2
1. Department of Strip Steel, Shougang Technology Research Institute, Beijing 100043, China 2. Technology and Quality Department, Shougang Qian’an Steel and Iron Co., Ltd., Qian’an 064404, Hebei, China
Abstract：The HP345 hot rolled strip used for welded gas cylinders was developed successfully by means of V and Ti micro-alloying design and controlled rolling and condoned cooling technology by Shougang Qian’an Iron and Steel Co., Ltd.. The chemical composition, metallurgy quality and mechanical property of HP345 volume-produced were analyzed in detail. The results show that the HP345 steel with low yield ratio and high strength which meets the national standard and the requirements of users can be developed and produced through Vanadium and Titanium micro alloying (wV≤ 0.025%, wTi≤ 0.025%) of low carbon manganese steel with the chemical composition of 0.17%C-0.25%Si-1.40%Mn, and can be rolled with high finish rolling and coiling temperature. A small amount of V and Ti element composite addition has very small effect on the microstructure of HP345 steel. Therefore, it cannot produce obvious fine grain strengthening, but can precipitate a sufficient number of precipitated phase particles in HP345 steel to produce obvious precipitation strengthening effect.
刘阳春，张云鹤，徐彬. 高强焊瓶钢HP345的研制与生产[J]. 中国冶金, 2015, 25(02): 29-33.
LIU Yang-chun,ZHANG Yun-he,XU Bin. Development and production of hot rolled strip steel HP345 used for welded gas cylinders. China Metallurgy, 2015, 25(02): 29-33.
2015, Vol. 25 
