Martensite high-alloy heat resistant steel metallography detection polishing agent and application thereof

Abstract

The invention relates to a Martensite high-alloy heat resistant steel metallography detection polishing agent, and the polishing agent comprises the following components in parts by weight: 1.8-2.2 parts of oxalic acid, 0.8-1.2 parts of hydrofluoric acid, 10-30 parts of water and 30-50 parts of hydrogen peroxide. The invention also relates to the application of the polishing agent in metallography detection, which comprises the following steps: (1) abrading; (2) polishing; (3) corrosion: a test surface of Martensite high-alloy heat resistant steel is corroded by chemical etchant, thus displaying a microscopic metallographic structure; (4) replication: a medical film is applied to the test surface of the Martensite high-alloy heat resistant steel, and micro morphology of the metallographic structure is extracted; and (5) observation: taking pictures and evaluation. The Martensite high-alloy heat resistant steel metallography detection polishing agent and the application have scientific compatibility, simple fabrication process, good polishing effect and high innovation and can effectively prevent pseudophase from generating in polishing.

Description

technical field [0001] The invention belongs to the field of polishing agents, in particular to a polishing agent for metallographic detection of martensitic high-alloy heat-resistant steel and its application. Background technique [0002] Polishing is an important process in metallographic testing. Metallographic testing is one of the necessary tests for material analysis. Especially for new materials, checking their microstructure and judging aging conditions are necessary means and requirements for evaluating failure and studying material properties. . At present, martensitic high-alloy heat-resistant steel is widely used in high-temperature and high-pressure components of large-capacity and high-parameter units. Martensitic high-alloy heat-resistant steel not only has high oxidation resistance and high-temperature steam corrosion resistance, but also has good impact toughness, high and stable durable plasticity and thermal strength. Due to its special material, we can...

AI Technical Summary

Problems solved by technology

The use of chemical polishing agents requires high polishing efficiency and no defects that affect the observation of the metallographic structure. If the polishing agent is used improperly, false phases will appear and affect the authenticity of the metallographic structure.