Boashan Iron & Steel Co., Ltd.

Institute of Soil and Fertilizer, Fujian Academy of Agricultural Sciences

Cailing Liu

Qijiang Wang

Qingchao Tian

Guoli Zhai

Qinghua Li

Yibin Huang

Fei Wang

Hui Zhang

Guotai Lin

Limin Wang

Chunmei He

A high strength and toughness seamless steel tube for an automobile airbag, comprising the following elements, by wt %: C: 0.05-0.15%; Si: 0.1-0.45%; Mn: 1.0-1.9%; Ni: 0.1-0.6%; Cr: 0.05-1.0%; Mo: 0.05-0.2%; Cu: 0.05-0.50%; Al: 0.015-0.060%; Nb: 0.02-0.1%; V: 0.02-0.15%; and the balance being Fe and other inevitable impurities. A method for manufacturing the seamless steel tube comprises the steps: (1) heating a tube blank and then soaking; (2) hot piercing, reducing the diameter and the wall thickness of the tube blank with a stretch reducer and then cooling naturally; (3) annealing, pickling, phosphating and saponifying; (4) cold working to obtain a finished product size; and (5) carrying out stress relief annealing treatment.

High-toughness seamless steel tube for automobile safety airbag and manufacturing method therefor

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Shanghai, China

Cailing Liu