case carburizing | 表面渗碳 (①When mild steel or certain alloy steels are heated above 900°C, in contact with carbon, that element is absorbed at the surface of the steel. The depth of the carbon enrichment depends on the time and temperature of the treatment; this process is known as 'case-carburizing' 当软钢或某些合金钢加热到 900°C 以上并与碳接触时,碳元素即被吸收到钢的表层。这一富碳层厚度取决于处理的时间和温度。这一工艺过程称之为"表面渗碳"。② The mechanism of the case-carburizing process is caused by carbon monoxide being formed, this decomposes to carbon atoms which diffuse into the steel surface. 表面渗碳过程的机理是由于所生成的一氧化碳分解成碳原子并扩散到钢的表面所致。) |