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Dissimilar steel cold crack sensitivity test method

A test method and crack test technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem of no dissimilar steel, etc., and achieve the effect of reliable test and evaluation

Inactive Publication Date: 2012-01-11
SHANGHAI BOILER WORKS
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is very necessary to conduct a cold crack sensitivity test on dissimilar steels before welding. Through the cold crack sensitivity test of dissimilar steels, the preheating temperature during welding of dissimilar steels can be determined and the best welding material can be selected. No dissimilar steel cold crack susceptibility test method and evaluation criteria

Method used

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  • Dissimilar steel cold crack sensitivity test method
  • Dissimilar steel cold crack sensitivity test method
  • Dissimilar steel cold crack sensitivity test method

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Embodiment Construction

[0017] 1. Prepare the test piece. According to GB 4675.1-84 weldability test oblique Y-groove welding crack test method to prepare the test piece, the form and size of the test piece according to figure 1 As shown, the electrodes used in the test can be selected to match the metal material 1 or the metal material 2 (high matching electrode, low matching electrode), or the electrodes whose grade is between the metal material 1 and the metal material 2 (middle matching electrode ).

[0018] 2. Conduct experiments

[0019] ① press figure 1 Assemble the test piece, that is, assemble the test piece according to the assembly drawing shown in GB 4675.1-84 Weldability Test Oblique Y-shaped Groove Welding Crack Test Method;

[0020] ② Welding restraint welds;

[0021] ③Preheat the test piece before welding at different temperatures;

[0022] ④Weld test welds with electrodes matching metal material 1 or metal material 2 (high matching electrode, low matching electrode), and electro...

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Abstract

The invention discloses a dissimilar steel cold crack sensitivity test method, which refers to an inclined Y type groove welding crack test method of a GB 4675.1-84 weldability test, and comprises test material preparation, test process and evaluation. Compared with the prior art, the invention has the advantage that the cold crack sensitivity in the dissimilar steel welding can be conveniently and reliably tested and estimated. Meanwhile, the test method provides a reliable basis for choosing best welding material and preheating temperature during the dissimilar steel welding.

Description

technical field [0001] The invention belongs to a test method for the weldability of metal materials. Background technique [0002] In the past, oblique Y-groove welding crack test, pin test and other methods were often used to evaluate the cold crack tendency of steel grades. However, all the test methods are only applicable to the cold crack sensitivity test of the same kind of steel, and there are no different kinds of cracks at home and abroad. Test methods and evaluation criteria for steel cold crack susceptibility. However, in actual engineering, it often occurs that two different types of steel need to be welded together. Therefore, it is very necessary to conduct a cold crack sensitivity test on dissimilar steels before welding. Through the cold crack sensitivity test of dissimilar steels, the preheating temperature during welding of dissimilar steels can be determined and the best welding material can be selected. There are no test methods and evaluation criteria ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/12
CPCB23K31/12
Inventor 卢征然
Owner SHANGHAI BOILER WORKS
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