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在机器制造工业部门中,为了节约贵重的高速鋼,广泛采用钎焊、对焊及堆焊等方法来制造刀具,而以堆焊法制造的双合金刀具最为经济。在制造形状复杂的大型切削刀具上,当整体刀具或其他焊接方法难于实现时,采用堆焊法制造更为优越。刀具用堆焊法制造时,一般均采用便宜的碳素结构鋼作刀体毛坯。在刀体毛坯上加工出一定形状和一定尺寸的堆焊槽,然后用特殊的堆焊焊条把槽填满,经过退火、机械加工、淬火和回火、刃磨而完成。堆焊方法有手工电弧焊、埋弧自动焊或气焊。气焊的堆焊金属容易形成较严重的共晶组织,使刀具切削部
In the machine-building industry sector, brazing, butt welding and surfacing are widely used to make tools for saving expensive high-speed steels. The dual-alloy tools manufactured by surfacing are most economical. In the manufacture of complex shapes of large cutting tools, when the overall tool or other welding methods difficult to achieve, the use of surfacing method to create more superior. Tool with surfacing method of manufacturing, the general use of cheap carbon structural steel for the tool body rough. The blank body is machined to a certain shape and a certain size of the welding groove, and then filled with a special surfacing electrode, after annealing, machining, quenching and tempering, grinding and finishing. Surfacing methods are manual arc welding, submerged arc welding or gas welding. Gas welding surfacing metal easy to form more serious eutectic, so that the cutting tool