论文部分内容阅读
一、前言在汽车生产中,许多小零件和标准件如管接头、轮胎螺母等是采用低碳高硫易切钢,在自动机上进行切削加工的。它们的产量大、品种多。我厂约有194种零件,采用易切钢制造。钢材的切削性能对产品的质量、产量、工具及动能的消耗有较大的影响。原设计采用A12钢,其切削性能不很好,刀具磨损严重,生产效率低,切削速度只能达到48m/min。由于汽车产量的增加,A12钢的切削性能远远满足不了生产的需要。我们与冶金厂经过反复试验,于1964年研制出了低碳高硫Y15钢,转产时切削速度可达60m/min,生产效率比A12钢提高35%。但近二十年的生产考核表明,虽然都是Y15钢,但其切削性能相差悬殊,有的炉号加工时的切削速度低到40m/min,而有的则高达70～80m/min。
I. Introduction In automobile production, many small parts and standard parts such as pipe joints, tire nuts and so on are made of low-carbon and high-sulfur free-cutting steel, and are machined on automatic machines. They produce large amounts of variety. I plant about 194 kinds of parts, using cut steel manufacturing. The cutting performance of steel products on the quality, output, tools and kinetic energy consumption have a greater impact. The original design using A12 steel, the cutting performance is not very good, serious tool wear and tear, low productivity, cutting speed can only reach 48m / min. Due to the increase of automobile production, the cutting performance of A12 steel can not satisfy the need of production. After repeated experiments with the metallurgical plant, we developed the low-carbon and high-sulfur Y15 steel in 1964. The cutting speed can reach 60m / min when converting and the production efficiency is 35% higher than A12 steel. However, nearly two decades of production tests show that although they are all Y15 steels, their cutting performance is quite different. In some furnaces, the cutting speed is as low as 40m / min while others are as high as 70-80m / min.