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35NCD16 alloy magnetic powder inspection defect detection method

A magnetic particle flaw detection and defect detection technology, which is applied in the fields of material magnetic variables, preparation of test samples, etc., can solve the problem of lack of systematic and standardized detection and analysis methods for defects of 35NCD16 alloy forgings.

Pending Publication Date: 2021-07-02
中航金属材料理化检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting defects in 35NCD16 alloy magnetic particle flaw detection, which solves the problem of lack of systematic standard detection and analysis methods for 35NCD16 alloy forging defects in the prior art

Method used

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  • 35NCD16 alloy magnetic powder inspection defect detection method
  • 35NCD16 alloy magnetic powder inspection defect detection method
  • 35NCD16 alloy magnetic powder inspection defect detection method

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Experimental program
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Embodiment 1

[0034] A defect detection method for 35NCD16 alloy magnetic particle flaw detection, specifically implemented according to the following steps:

[0035] Step 1. Observe the shape and size of the defect under magnetic particle inspection, and record the position of the defect;

[0036] Step 2, cut out the normal sample and the defect sample, conduct microstructure analysis, determine that it is a metallurgical defect, and proceed to step 3;

[0037] Step 3, analyze the oxidation phenomenon of the corrosion state defect sample, judge the non-oxidation loss, and proceed to step 4;

[0038] Step 4. Analyzing the composition of the microstructure of the corroded defect sample.

[0039] Step 2 is specifically implemented according to the following steps:

[0040] Step 2.1, polishing the normal sample and the defective sample to obtain a polished normal sample and a polished defective sample;

[0041] Step 2.2, observe the polished defect sample under a 100X optical microscope;

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Abstract

The invention discloses a 35NCD16 alloy magnetic powder inspection defect detection method which is specifically implemented according to the following steps of 1, observing the shape and size of a defect under magnetic powder inspection, and recording the position of the defect, 2, cutting a normal sample and a defective sample, carrying out microscopic structure analysis, judging to be a metallurgical defect, and carrying out step 3, 3, carrying out oxidation phenomenon analysis on the corrosion-state defect sample, judging non-oxidation loss, and carrying out step 4, and 4, carrying out microscopic structure component analysis on the corrosion-state defect sample. According to the scheme, the properties and reasons of the defects of the 35NCD16 alloy forge piece are determined through methods such as magnetic powder inspection defect observation, macroscopic and macroscopic structure observation, scanning electron microscope structure observation and energy spectrum component analysis.

Description

technical field [0001] The invention belongs to the technical field of metal quality inspection, and relates to a defect detection method for 35NCD16 alloy magnetic particle flaw detection. Background technique [0002] 35NCD16 is a chromium-nickel-molybdenum alloy structural steel that can be used as tempered steel and ultra-high-strength steel. In the state of modulation treatment, it has excellent strength, toughness and plasticity; after quenching and low temperature tempering, it has high strength. Generally, electric arc furnace + vacuum consumable remelting or electric arc furnace + electroslag remelting are used for melting. It has been widely used as important aviation shafts, bolts and aircraft landing gear and other parts. [0003] This program determines the nature and cause of defects in 35NCD16 alloy forgings through methods such as magnetic particle flaw detection defect observation, high and low magnification structure observation, scanning electron microsc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/84G01N1/32
CPCG01N27/84G01N1/32
Inventor 刘海龙吴锐红温荣平
Owner 中航金属材料理化检测科技有限公司