30CrMo钢表面脱碳试验

 在实验室模拟CSP工艺的加热条件，对30CrMo钢进行试验，用金相法测量脱碳层厚度，用失重法对30CrMo钢的氧化层厚度进行估算，结合氧化烧损研究了加热温度和保温时间对30CrMo钢的实际脱碳层厚度的影响规律。结果表明，在试验气氛为（体积分数，%）CO216.5、O20.8、H2O13、N269.7，加热温度范围为1 000～1 150 ℃时，30CrMo钢的实际脱碳层厚度随着加热时间的增加而增加，低于1 050 ℃时，脱碳层厚度随着温度升高而增加，高于1 050 ℃时，脱碳层由于氧化加剧而减少，1 050 ℃为脱碳敏感温度。

Experiment on surface decarburization of 30CrMo steel

An experiment simulating the heating environment of CSP furnace was performed for 30CrMo steel. The de-carburization layer depth was measured by micrographic method. And the oxide layer thickness was calculated by meth-od of weight loss. The effect of heating temperature and holding time on the 30CrMo steel decarburization layer depth was studied combined with oxidation loss. The results show the decarburization layer depth increases gradually with in-creasing the holding time when sample is heated at 1 000-1 150 ℃ under the experimental atmosphere (volume per-cent,%)CO216.5,O20.8,H2O13,N269.7. The decarburization layer depth increases gradually with increaseing the heating temperature below 1 050℃. The layer depth gradually decreases when the temperature is over 1 050℃due to the se-vere oxidation. The decarburization layer depth reaches the peak at 1 050℃.