对焊高速钢丝锥的三硝水溶液整体淬火

Whole Quenching in Solution of Tri-nitrate in Water for Butt Welded High Speed Steel Tap

由HSP15超硬高速钢刃部和45钢柄部堆焊的手工丝锥可在硬度高达48～52HRC的超高强度钢零件上攻螺纹。这种对焊丝锥的传统热处理工艺是刃部、柄部分别处理。后采用在三硝水溶液中整体淬火的工艺处理，从而简化了工艺过程，节省了能耗，消除了淬火油烟，而且丝锥的硬度和耐磨性比按传统工艺热处理的丝锥更好。改进后的热处理工艺已成功地应用于对焊丝锥的生产。

A kind of manual taps,butt welded by edge of HSP15 superhard high speed steel with handle of 45 steel, can tap in ultra-high strength steel parts with the hardness as high as 48 -52 HRC. For such butt welded taps, their edges and handles were respectively heat treated in conventional practice. Afterwards, the taps were integrally quenched into a solution of tri-nitrate in water, in this way simplifying the heat treatment process, decreasing the energy consumption and eliminating the mist during oil-quenching, with the taps providing higher hardness and wearability compared with the conventional heat treatment process. The improved heat treatment process has now been successfully adopted in the production of butt welded taps.