Method for eroding 2Cr12Ni1Mo1Vsteel grain boundary
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HARBIN TURBINE
- Publication Date
- 2013-01-16
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
Technical field
[0001] The invention relates to the field of steel grain boundary corrosion methods. Background technique
[0002] When evaluating the grain size of 2Cr12Ni1Mo1V stainless steel, the corrosion method is used to corrode the microstructure, and the size of the grain is determined by the length of the martensite lath in the microstructure. However, the existing Corrosion method After corroding 2Cr12Ni1Mo1V stainless steel, it is often impossible to truly reflect the grain boundaries of 2Cr12Ni1Mo1V steel. For example, the commonly used method now is to corrode 2Cr12Ni1Mo1V stainless steel with hydrochloric acid picric acid alcohol solution (volume of hydrochloric acid: volume of alcohol: mass of picric acid is 5mL : 100mL: 1g), and the corrosion effect is observed through a microscope, the grain boundary is not clear, it is impossible to make an accurate grain size evaluation, let alone the intercept point method to check the grain size level. Summary of the inventi...