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1.前言众所周知,顶头是斜轧穿孔机穿孔的关键工具。顶头的形状和寿命都直接影响穿孔机的能耗、小时产量、成材率等。目前国内φ76机组、φ60机组穿孔机顶头绝大部分为球面形,材质为3Cr2W8V合金工具钢。用该顶头穿碳素管坯、低合金结构钢管坯时使用寿命不低,但穿高碳GCr15管坯时,一个顶头只能穿10～30支毛管(管坯长1～1.2m),顶头消耗量大,因频繁更换顶头,穿孔机作业率低,顶头表面质量差使毛管内表面质量下降。为此我厂从1980年开始进行了用复合顶头穿GCrl5轴承钢的试验研究。
1. Preface As we all know, the head is a key tool for cross-piercing piercing machine. The shape of the head and life expectancy have a direct impact on energy consumption perforator, hourly yield, yield and so on. The current domestic φ76 unit, φ60 unit piercing machine head most of the spherical shape, made of 3Cr2W8V alloy tool steel. The use of the head wear carbon tube, low alloy steel tube life is not low, but when wearing high carbon GCr15 tube, a head can only wear 10 to 30 capillary (tube length 1 ~ 1.2m), the head Consumption, due to frequent replacement of the head, piercing machine operation rate is low, the poor quality of the top surface of the capillary tube surface quality decline. To this end I plant from 1980 onwards with a composite head wear GCrl5 bearing steel experimental study.