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Method for determining shot peening strengthening optimum parameter of 1Cr12Ni2WMoVNb martensite stainless steel gas turbine blade

A technology for gas turbine blades and martensitic stainless steel, applied in multi-objective optimization, geometric CAD, design optimization/simulation, etc., can solve problems such as unspecified optimal parameters of shot peening, and improve high-cycle fatigue life and fatigue service life and the effect of ensuring the performance of the unit

Active Publication Date: 2018-10-26
HARBIN GUANGHAN GAS TURBINE
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Problems solved by technology

However, for blades made of 1Cr12Ni2WMoVNb stainless steel, neither relevant standards nor literature research have given the optimal parameters of shot peening for this material.

Method used

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  • Method for determining shot peening strengthening optimum parameter of 1Cr12Ni2WMoVNb martensite stainless steel gas turbine blade
  • Method for determining shot peening strengthening optimum parameter of 1Cr12Ni2WMoVNb martensite stainless steel gas turbine blade

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Embodiment Construction

[0014] Through a large number of experimental studies, the optimal parameters for shot peening of 1Cr12Ni2WMoVNb stainless steel gas turbine blade products are found from the perspective of the surface state (roughness, residual stress, etc.) The formed residual stress field and so on. The shot peening shot is S110, the shot peening is carried out according to HB / Z26, and the fatigue test is designed according to HB / Z 5277, including the structural design, production and fatigue test process of the test piece.

[0015] Through the test data that meets the sample statistical standards, the optimal shot peening parameters are obtained, and the corresponding surface state is obtained at the same time. The specific process is as follows:

[0016] 1. Test piece structure design

[0017] The specimen structure is designed according to HB / Z 5277, and the specimen structure can most effectively represent the stress state of the blade, and the thickness of the specimen is (3±0.2)mm. ...

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Abstract

The invention relates to an evaluation method and specifically relates to a method for determining a shot peening strengthening optimum parameter of a 1Cr12Ni2WMoVNb martensite stainless steel gas turbine blade. The method comprises the following steps of designing a test blade structure; carrying out a test blade shot peening technology; carrying out a test blade fatigue test; analyzing fatigue life; analyzing a residual stress field; and analyzing roughness. Through shot peening strengthening, the high cycle fatigue life of parts can be effectively improved. For the 1Cr12Ni2WMoVNb martensitestainless steel gas turbine blade, through standard test blade design and test, the effectiveness of improving the vibration fatigue life of a stainless steel material based on the shot peening strengthening under different shot peening parameters is verified, the vibration fatigue test of the stainless steel test blade is designed, and a shot peening parameter with the optimum strengthening effect is determined. Through integration of a surface state and the vibration fatigue life of the strengthened test piece, the shot peening strengthening optimum parameter applicable to a 1Cr12Ni2WMoVNbmartensite stainless steel gas turbine blade product is obtained.

Description

Technical field: [0001] The invention belongs to the technical field of energy and power, and in particular relates to a method for determining optimal parameters of shot peening strengthening of 1Cr12Ni2WMoVNb martensitic stainless steel gas turbine blades. Background technique: [0002] Shot peening can effectively improve the fatigue life of parts. For gas turbine compressor blades, the significant increase in fatigue life is one of the important ways to improve engine reliability, and this work is of great significance. 1Cr12Ni2WMoVNb is an excellent martensitic stainless steel, which is widely used in the selection of design materials for gas turbine compressor blades. However, for blades made of 1Cr12Ni2WMoVNb stainless steel, neither relevant standards nor literature research have given the optimal parameters of shot peening corresponding to this material. Standards or research results only give the range of empirical parameters for stainless steel materials. In fac...

Claims

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Application Information

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IPC IPC(8): G06F17/50C21D7/06
CPCC21D7/06G06F2111/06G06F30/17G06F30/20
Inventor 张亮初曙光高硕徐宁邹献辉金鹏刘云宁刘冰冰王琦罗铭聪王廷
Owner HARBIN GUANGHAN GAS TURBINE
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