The results show that because of tensile stressproducted in their environment and working process, the gas turbine wheel cracks under the action of stress corrosion.
结果表明，由于叶轮所处环境及工作过程中所受的拉应力作用，风机叶轮在应力腐蚀作用下开裂。
In addition, improper heat treatment process and welding defects promotes the destruction trend in the gas turbine wheel.
另外，热处理工艺不当以及焊接缺陷是造成叶轮失效的促进因素。
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