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首页> 外文会议>Asia-Pacific Power and Energy Engineering Conference;APPEEC 2009 >Predict the Temper Embrittlement Extent of Turbine Rotor Steel by Using Chemical Corrosion Method
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Predict the Temper Embrittlement Extent of Turbine Rotor Steel by Using Chemical Corrosion Method

机译：用化学腐蚀方法预测涡轮转子钢的回火脆化程度

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The segregation of phosphorus on steel grain boundary will lead to temper embrittlement, and turbine rotor steel's FATT (Fracture Appearance Transition Temperature) will raise. In this test the solution of picric acid and SDBS (sodium dodecyl benzene sulfonate) were used to corrode the turbine rotor steel sample. Phosphorus on grain boundary can be prior dissolve, so the grain boundary corrosion happen. After etch, width of etch groove on the grain boundary were measured and analyze by Photoshop. Then find out all relevant parameters with FATT which represents the degree of temper embrittlement. And then the predict model of FATT was established by make multiple linear regression analysis on all relevant parameters. The verifying experiment show that the model's error range is about plusmn20degC.
机译：磷在钢晶界的偏析将导致回火脆化，并且涡轮转子钢的FATT（断裂外观转变温度）将升高。在该测试中，使用苦味酸和SDBS（十二烷基苯磺酸钠）溶液腐蚀涡轮转子钢样品。晶界上的磷可以先溶解，从而发生晶界腐蚀。刻蚀后，测量晶界上刻蚀槽的宽度，并用Photoshop分析。然后用FATT找出代表回火脆化程度的所有相关参数。通过对所有相关参数进行多元线性回归分析，建立了FATT的预测模型。验证实验表明，该模型的误差范围约为plusmn20degC。

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