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一、前言1.钢铁的用途和热处理的作用在一切工业材料中钢铁使用得最多。在日本,粗钢年产量约为1亿吨,这就可以说明钢铁占有何等重要的地位。钢铁的资源比较丰富,冶炼比较容易,这也许是较为重要的,但是,性能强韧这一点是最为重要的理由。因此,结构用材料中大量使用的是钢铁。微观结构(显微组织)对强韧性这样的机械性能非常敏感,随金属组织的改变而发生很大变化。由于钢铁有相变现象,所以调
I. INTRODUCTION 1. Use of Steel and the Role of Heat Treatment Steel is used most among all industrial materials. In Japan, the annual output of crude steel is about 100 million tons, which shows the important position of steel. Steel is rich in resources, smelting easier, which may be more important, but the performance is tough the most important reason. Therefore, the structural materials used in large quantities are steel. Microstructures (microstructures) are very sensitive to mechanical properties such as toughness, and vary greatly with the microstructure of the metal. Due to the phase change of steel, so tune