Material component design method for thermal power unit super-critical steam turbine heat resisting part

• Main Authors: LI SHAOYU, MA JIN, FENG ZHOURONG
• Format: Patent
• Language: Chinese; English
• Published: 23.03.2016
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of high alloy heat resisting steel materials, in particular to a material component design method for a thermal power unit super-critical steam turbine heat resisting part to prevent a material structure from containing a bad structure delta-Fe so as to improve high-temperature mechanical performance of the material. The material component design method is formed by improving high alloy heat resisting steel with a mark of ZG12Cr9Mo1CoNiVNbNB; in the material component design process, a nickel equivalent weight Nieq and a chromium equivalent weight Creq of an alloy material are respectively calculated by upper limit values and lower limit values of all elements according to content ranges of all the elements in components through the following formula 1 and formula 2; then, values of Nieq, Creq and Nieq/Creq are preferentially determined according to the statistical distribution relation between Nieq/Creq and delta-Fe content; and finally, material components accord