摘要
1 前言双层辉光离子渗钨钼手用钢锯条,为我研究所1978年研制成功,现已形成一定生产能力。在试验室试验中,渗金属炉体积小,渗后冷却速度快,渗层析出物细小,切削性能及韧性皆可达到技术要求。但在工业生产中,炉子容量大,渗后冷却速度慢,渗层中析出大块状、针状或网状析出物,造成崩齿过早失效。本文针对此问题,研究析出物形成条件,并测定其 TTT 曲线,为双辉渗锯条工艺参数制定,冷却速度的控制,渗金属炉结构设计提供依据。2 试验材料及方法试样为20钢,尺寸为φ15mm×5mm。源极材料为 W20Mo80粉末冶金合金。
The hand saw,double glow discharged with W-Mo,has been putinto production.After metallizing,some intermetaltic compound(lumpy andhetty)precipitated in layers for slow cooling rate,making crumbliness ofsaw-teeth and produced deterioration of cutting ability.For solving these defi-ciency problems,the precipitation forming condition and ir's TTT curves,andthe work basis for chosing process parameters and the design of double glowdischarge surface alloying furnace were also studied.
关键词
双辉渗钨钼
析出物
TTT曲线
锯条
double glow discharged W-Mo
precipieatioa TTT curres
