摘要
在煤油渗剂中添加微量稀土元素对Q235钢耐火砖模具进行稀土高浓度渗碳，可使渗速加快，渗层碳浓度增高，层深尤其是过共析＋共析层深度增加；渗层硬度较高且硬度梯度较缓；渗层组织中的碳化物数量增多，且呈细小颗粒状弥散分布。生产实践表明，经该工艺处理的耐火砖模具，使用寿命可比常规气体渗碳处理的模具提高2-3倍。
The kerosene carburizers with a few additive of rare earth were used to carbonize firebrick die of Q235 steel. The rare earth high concentration carbonization can effectively enhance the carbonizing rate, increase the carbon cncentration of the carbonizing layer, the layer depth, especially the depth of the hypereuteetoid＋euteeteid layer and the effective hardening layer are increased. The hardness gradient is slight. The amount of carbide is increased and is dispersed in the form of fine granular that the service life of the carbonization is increased Q235 steel by two to in the carbonized layer. The practical applications show firebrick die carbonized by high concentration rare earth three times compared with that of conventional gas carbonization.
出处
《模具制造》
2008年第9期74-76,共3页
Die & Mould Manufacture
关键词
稀土元素
渗碳
耐火砖模具
rare earth
carbonization
firebrick die
