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Method for eroding 2Cr12Ni1Mo1Vsteel grain boundary

A grain boundary and sample technology, applied in the field of steel grain boundary corrosion, can solve problems such as the inability to truly respond to 2Cr12Ni1Mo1V steel grain boundaries, and achieve the effects of easy mastery, high corrosion efficiency, and fast corrosion rate

Inactive Publication Date: 2013-01-16
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the existing method for corroding the grain boundary of 2Cr12Ni1Mo1V steel often cannot truly reflect the grain boundary of 2Cr12Ni1Mo1V steel, and provides a method for corroding the grain boundary of 2Cr12Ni1Mo1V steel

Method used

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  • Method for eroding 2Cr12Ni1Mo1Vsteel grain boundary
  • Method for eroding 2Cr12Ni1Mo1Vsteel grain boundary

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specific Embodiment approach 1

[0020] Specific embodiment 1: This embodiment provides a method for corroding the grain boundaries of 2Cr12Ni1Mo1V steel, which is specifically completed according to the following steps:

[0021] 1. Take picric acid and put it into water to prepare a supersaturated picric acid solution;

[0022] 2. To the supersaturated picric acid solution obtained in step 1, add Seagull brand shampoo, stir to completely dissolve the shampoo in the saturated picric acid solution, and obtain the supersaturated picric acid dissolved in the seagull brand shampoo Solution; Among them, the ratio of the mass of the added Seagull shampoo to the volume of the supersaturated picric acid solution is (2.5mg~5mg): 1mL;

[0023] 3. Add hydrochloric acid to the supersaturated picric acid solution with Seagull brand shampoo obtained in step 2, and stir to obtain a corrosive reagent; wherein the mass percentage concentration of hydrochloric acid is 36%~38%; added hydrochloric acid The volume ratio of the supersat...

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ratio of the mass of the added Seagull shampoo in step 2 to the volume of the supersaturated picric acid solution is 2.5 mg: 1 mL. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the ratio of the mass of the added Seagull shampoo in step 2 to the volume of the supersaturated picric acid solution is 4 mg: 1 mL. Others are the same as the first embodiment.

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Abstract

The invention discloses a method for eroding 2Cr12Ni1Mo1V steel grain boundary, relating to a method for eroding the steel grain boundary. According to the method, solves the problem that the existing method for eroding 2Cr12Ni1Mo1V steel grain boundary can not really respond to the problem of 2Cr12Ni1Mo1Vsteel grain boundary usually. A method for eroding 2Cr12Ni1Mo1V steel grain boundary comprises the steps of 1. preparing a corrosion reagent; and 2. eroding 2Cr12Ni1Mo1V steel. The method for eroding 2Cr12Ni1Mo1V steel grain boundary is applied in evaluating grain degree of 2Cr12Ni1Mo1V steel.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32
Inventor 邢玉荣曹雪高祥娟杨松桦王东宁张继婵
Owner HARBIN TURBINE
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