Martensite aging stainless steel dendritic crystal corrodent and corrosion method

A technology of stainless steel and martensite, which is applied in the field of maraging stainless steel dendrite corrosion agent and corrosion, can solve the problems of complex configuration method, unsatisfactory erosion effect, and inability to clearly display dendrite morphology, etc., to achieve simple formula, The effect of simple operation steps
CN110749718AInactive Publication Date: 2020-02-04CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
Publication Date
2020-02-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a martensite aging stainless steel dendritic crystal corrodent and corrosion method, and belongs to the technical field of metallographic analysis of iron and steel. The corrodent provided by the invention is an analytical pure nitric acid aqueous solution, which is prepared from an analytical pure nitric acid and water. The dendritic crystal corrosion method comprises thesteps of: a. cutting an as-cast sample for grinding and polishing; b. preparing the dendritic crystal corrodent; and c. using a stainless steel sheet as a cathode, using the sample as an anode, and placing the as-cast sample in the corrodent to perform electrolytic etching at room temperature. The corrodent provided by the invention has a simple formula, simple operation steps, and clear and accurate detection results of dendritic crystal corrosion, data such as interdendritic spacing can be accurately calculated through clear morphology of the dendritic crystal, and segregation degrees between dendritic crystals and dendritic crystal stems can be measured by using an energy spectrum for evaluating quality of the as-cast structures and assisting in evaluating the elimination of dendriticsegregation by the homogenization heat treatment.
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Description

technical field

[0001] The invention belongs to the technical field of iron and steel metallographic analysis, and in particular relates to a maraging stainless steel dendrite corrosion agent and a corrosion method. Background technique

[0002] PH13-8Mo maraging stainless steel is a new type of high-strength stainless steel with high strength, high hardness and excellent corrosion resistance. It can be used in aerospace, nuclear reactor and petrochemical industries. In actual production, molten steel tends to produce dendrite segregation during the solidification process. The higher the degree of alloying, the easier the grain segregation characteristics will be left in the rolled material, which will affect the mechanical and corrosion properties of the finished product. Therefore, the corresponding dendrite Detection technology is critical. By observing the solidified dendrite structure of the slab, measuring the primary and secondary dendrite spacing, etc. to judge the ...

Claims

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