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一、前言目前国内测试钢的过冷奥氏体等温转变曲线以热磁法为主,热磁法所用加热炉和等温炉的介质以金属浴炉为多,对其介质而言,不但要求具有较快的加热速度和冷却速度,而且也应具有较宽的使用温度范围,防止氧化、脱碳等缺陷,除此之外,对人身危害和环境的污染也应给予重视等等。测试时所选用的介质由于冷却速度不同,也会给试验结果带来差异,致使各单位虽按标准规定
I. Preface At present, the test curve of isothermal transformation of undercooled austenite in China is dominated by thermomagnetic method. The medium used in thermomagnetic method for reheating furnace and isothermal furnace is mainly metal bath furnace. For its medium, it not only requires Faster heating rate and cooling rate, but also should have a wider range of use temperature, to prevent oxidation, decarburization and other defects, in addition, the risk of personal injury and the environment should also be given attention and so on. Due to the different cooling rate of the media used in the test, the test results will bring about differences, resulting in the units according to the standard