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本文对20钢进行了气体渗碳和稀土碳共渗,在满足碳势控制精度条件下测定了稀土碳共渗过程中碳在奥氏体中的扩散系数。 1 试验材料和试验方法试验材料为20钢,加工成15×10×5mm的金相试样。在碳势控制精度为±0.05％的井式气体渗碳炉中随炉进行气体渗碳和稀土碳共渗处理,湿度分別为880、900和920℃。稀土加入量为能够获得最大层深吋的克数,将稀土溶入甲醇中滴入炉内。 2 试验结果及分析
In this paper, gas carburizing and rare earth carbon infiltration were carried out on 20 steel to determine the diffusion coefficient of carbon in austenite in rare earth carburizing process under the condition of controlling carbon potential. A test materials and test methods The test material is 20 steel, processed into 15 × 10 × 5mm metallographic sample. Gas carburizing and RE carburizing were carried out with a furnace in well type gas carburizing furnace with a carbon potential control accuracy of ± 0.05% at humidity levels of 880, 900 and 920 ° C, respectively. Rare earth to add the maximum depth can be obtained in grams, the rare earth dissolved in methanol drip into the furnace. 2 test results and analysis