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一前言凡在温度较高或高温下工作的铁铸件,例如钢锭模,热轧金属所用的轧辊,蒸汽锅炉、热凤炉、加热炉等的另件,熔化金属所用的铁坩埚,浇铸用的金属型,热处理所用的渗碳箱、退火箱,内燃机的出气阀、废气管等;因为在工作过程中,铸铁发现生长(体积长大)和氧化,以致易于损坏。为延长上述各种机件的使用寿命,应以耐热铸铁铸制。二耐热铸铁的概念普通灰口铸铁在温度较高(临界温度以下的范围)或高温下(高于临界温度)工作,其
I. INTRODUCTION Iron castings, such as ingot molds, rolls for hot-rolled metal, steam boilers, hot stoves, furnaces and the like, iron castings used for melting metals, Metal type, carburizing box used for heat treatment, annealing box, outlet valve of internal combustion engine, exhaust pipe, etc. Because cast iron finds growth (volume growth) and oxidation during work, it is easy to damage. In order to extend the service life of the above-mentioned various parts, should be cast with heat-resistant cast iron. Second, the concept of heat-resistant cast iron Ordinary gray cast iron in the high temperature (below the critical temperature range) or high temperature (above the critical temperature) work, which