前言在毛泽东思想伟大紅旗指引下,近年来我国鋼铁工业得到了迅速发展,頂吹氧炼鋼法正在广泛采用,大型厚壁低合金鋼球形儲氧罐的生产日益增多,因而消除焊接內应力的工作也随之提到日程上来。但是,目前消除焊接內应力的方法,一般采用650℃高温回火,由于设备 Preface Under the guidance of the great red banner of Mao Zedong Thought, China’s steel industry has witnessed rapid development in recent years. The top-blown oxygen steelmaking method is being widely adopted. The production of large thick-walled low alloy steel spherical oxygen storage tanks is increasing day by day. Work also mentioned the agenda up. However, at present, the method of eliminating internal stress of welding generally adopts tempering at a high temperature of 650 DEG C, and since the equipment