前言随着农业机械化事业的蓬勃发展,农机旧件的修复工作,日益广泛深入地发展起来。易损的轴类和齿轮类另件,在修复件的总数中占有相当比重。修复这两类另件的典型工艺,是将已磨损的另件表面堆焊上一层硬而耐磨的金属,然后加工成所要求的另件。但这个焊后的加工问题,多年来没有很好的解决。73年南北方修理会议上,提出要 Preface With the vigorous development of agricultural mechanization, the repair of old agricultural machinery has been increasingly and extensively developed. Vulnerable shaft and gear parts, the total number of repair parts account for a considerable proportion. A typical process for repairing these two types of parts is to build up a hard, wear-resistant metal on the surface of the worn parts and then to the required parts. However, this post-welding processing problem has not been well solved for many years. 73 North-South repair meeting, proposed to be