日本川崎钢铁公司千叶厂为在３号热带轧机上采用无头轧制技术，要求在短时间内对粗轧机中间坯进行焊接并使其具有稳定的焊接强度。为此，该厂开发了感应加热＋对焊方式的中间坯焊接技术。这种焊接方式首先是将需焊接的前一根中间坯的尾端和后一根中间坯的前端对置并隔开微小距 Japan Kawasaki Steel Chiba plant in the No. 3 hot rolling mill with headless rolling technology, requiring a short period of time on the roughing mill intermediate and make it a stable welding strength. To this end, the plant has developed the induction heating + butt welding of the middle of the blank welding technology. This method of welding is to first weld the trailing end of the preceding intermediate bar and the leading end of the succeeding intermediate bar,