工业汽轮机汽缸用材无塑性转变温度的研究

摘要

The issue that the temperature of test liquid required by the hydraulic test shall be higher than the nil-ductility transition temperature of test material has been expressed. The NDT temperature of steel used for the cylinder of industrial steam turbine has been examined by the drop test, and the factor influenced on NDT temperature has been analyzed as well. By adopting the advanced smelting technology and heat treatment process to strictly control P and S contents, and refining the grain, NDT temperature of steel could be reduced effectively.%针对水压试验要求试验液体温度应高于试验材料的无塑性转变温度的问题，通过落锤试验测定了工业汽轮机汽缸用材的NDT温度，并分析了影响NDT温度的因素。通过先进的冶炼技术和热加工工艺严格控制P、S含量，细化晶粒等手段，可有效降低钢材的NDT温度。