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Multipurpose nondestructive testing natural defect test block and manufacturing method

A non-destructive testing, natural defect technology, applied in the preparation of test samples, measuring devices, material analysis using wave/particle radiation, etc. and training effects

Active Publication Date: 2019-12-10
盐山双盛金属材料检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of the existing non-destructive testing test block manufacturing method which is complex and expensive, and a single test block often only contains a single defect, and provide a multi-purpose non-destructive testing natural defect test block and its manufacturing method

Method used

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  • Multipurpose nondestructive testing natural defect test block and manufacturing method
  • Multipurpose nondestructive testing natural defect test block and manufacturing method
  • Multipurpose nondestructive testing natural defect test block and manufacturing method

Examples

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Embodiment 1

[0052] Take the butt welding of 18mm thick 45 steel plates as an example.

[0053] First, open a U-shaped groove on the test block, and repair the blunt edge by 2mm. Root welding with argon tungsten arc welding, filler welding and cover welding with electrode arc welding. Among them, the welding material for argon tungsten arc welding: the welding wire is ER55~G welding wire with a diameter of 2.5mm, the purity of argon gas is 99.99%, and the tungsten electrode is a cerium tungsten electrode with a diameter of 2.4mm. Welding material for electrode arc welding: J507 electrode with a diameter of 4mm. Main welding process parameters: Preheating before welding: preheating temperature 250°C, electrode drying at 350°C for 2 hours, argon tungsten arc welding for root welding with DC forward connection, welding current 150A, electrode arc welding with DC reverse connection, filling welding 2 passes, welding current 160A, cover welding welding current 180A, post-weld heat treatment: ...

Embodiment 2

[0066] Take the butt welding of 18mm thick 30CrMnSiA alloy steel plate as an example.

[0067] First, open a U-shaped groove on the test block, and repair the blunt edge by 2mm. Root welding with argon tungsten arc welding, filler welding and cover welding with electrode arc welding. Among them, the welding material for argon tungsten arc welding: the welding wire is ER90S~G welding wire with a diameter of 2.5mm, the purity of argon gas is 99.99%, and the tungsten electrode is a cerium tungsten electrode with a diameter of 2.4mm. Welding material for electrode arc welding: 4mm J707 electrode. Main welding process parameters: Preheating before welding: preheating temperature 250°C, electrode drying at 350°C for 2 hours, argon tungsten arc welding for root welding with DC forward connection, welding current 150A, electrode arc welding with DC reverse connection, filling welding 2 passes, welding current 160A, cover welding welding current 180A, post-weld heat treatment: heat p...

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Abstract

The invention belongs to the field of nondestructive testing, and discloses a manufacturing method of a multipurpose nondestructive testing natural defect test block, which comprises the following steps: forming a groove on a base material with the thickness of more than 12mm, and carrying out backing welding by adopting argon tungsten-arc welding, wherein both the base material and a weld joint can be magnetized; filling the grooves of the base metal through shielded metal arc welding to complete weld joint filling; in the filling welding process, making an incomplete fusion defect, an incomplete penetration defect, an air hole defect, a slag inclusion defect and a tungsten inclusion defect in the weld joint; determining a designed crack area on the weld joint, coating ferrous sulfide powder on the designed crack area, and then performing shallow penetration and remelting on the weld joint in the designed crack area; polishing the remelting area of the weld joint, and polishing off unmelted ferrous sulfide; and performing cosmetic welding on the surface of the weld joint to obtain the multipurpose nondestructive testing natural defect test block. The manufacturing process is simple, the cost is low, cracks with various defects and that are close to the natural forms are formed, and the training and teaching requirements are met.

Description

technical field [0001] The invention belongs to the field of nondestructive testing, and relates to a multipurpose nondestructive testing natural defect test block and a manufacturing method. Background technique [0002] Non-destructive testing is the use of ultrasonic, ray and other physical methods to detect the workpiece without destroying the workpiece to ensure the quality of the workpiece by discovering the defects in the workpiece. The teaching and assessment of non-destructive testing requires the use of a large number of test blocks containing natural defects to provide teaching cases and allow students to practice. Since the non-destructive testing industry mostly exists in confidential industries such as aerospace, and the lack of connection between teaching and training and non-destructive testing in other industries, the teaching and assessment of non-destructive testing lacks urgently needed test blocks containing natural defects. [0003] At present, there a...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N23/00G01N27/84
CPCG01N1/28G01N23/00G01N27/84
Inventor 史洪源李杰党杰惠媛媛朱耀产周鹏
Owner 盐山双盛金属材料检测有限公司
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