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我厂机芯、千分表、百分表等产品的生产,需要大量φ1～2.2×35～50mm 高速钢铰刀、三角钻、枪钻等。要求淬火后硬度 HRC62～65,弯曲度<0.10mm。因刀具细长,刃口薄,磨量少,过去采用高温盐炉常规淬火(直接淬火和装套筒淬火),不但变形大无法校直,而且易过热,易脱碳。装套筒淬火时边缘刀具极易过热变形,发脆,而中心刀具硬度却很低。因此多年未能正常生产。近年有些厂对类似刀具应用真空淬火,变形超差问题仍未能解决。为此我们开始了光亮淬火试验,效果良好。已投入批量生产。
Our factory movement, dial indicator, dial indicator and other products require a large number of φ1 ~ 2.2 × 35 ~ 50mm high-speed steel reamers, triangular drilling, gun drilling and so on. After quenching the required hardness HRC62 ~ 65, curvature of <0.10mm. Due to the slender blade, thin edge, less grinding, the conventional high-temperature salt furnace quenching (direct quenching and loading sleeve quenching), not only large deformation can not be straightened, but also easy to overheat, easy decarburization. When the sleeve quenching edge cutting tool easily overheat deformation, brittle, but the center cutter hardness is very low. So many years failed to normal production. In recent years, some plants on similar tool vacuum hardening, deformation tolerance problem still can not be solved. To this end we started a bright quenching test, the effect is good. Has been put into mass production.