Reheating crack sensitivity test method for dissimilar steels

A technology of reheat crack and test method, 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: 2012-03-14
SHANGHAI BOILER WORKS
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  • Abstract
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Problems solved by technology

Therefore, it is very necessary to conduct a reheat crack sensitivity test on dissimilar steels before welding. Through the reheat crack sensitivity test of dissimilar steels, the optimal heat treatment temperature and the

Method used

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  • Reheating crack sensitivity test method for dissimilar steels
  • Reheating crack sensitivity test method for dissimilar steels
  • Reheating crack sensitivity test method for dissimilar steels

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Embodiment Construction

[0028] 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 ).

[0029] 2. Conduct experiments

[0030] 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;

[0031] ② Welding restraint welds;

[0032] ③ Preheating before welding according to the preheating temperature + 50°C determined by the cold crack sensitivity test method of dissimilar steels; (this method will be introduced below)

[0033] ④Weld test welds w...

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Abstract

The invention discloses a reheating crack sensitivity test method for dissimilar steels. By consulting a Y-shaped groove welding crack test method of GB 4675.1-84 weldability test, the method comprises the steps of test piece preparation, test process and evaluation. Compared with the prior art, the method has the advantage of conveniently and reliably testing and evaluating the reheating crack sensitivity of the welded dissimilar steels. Meanwhile, by the test method, reliable basis is provided for selecting optimal welding materials and heat treatment temperatures during welding the dissimilar steels.

Description

technical field [0001] The invention belongs to a test method for the weldability of metal materials. Background technique [0002] In the past, the reheat crack susceptibility test methods for evaluating steel grades were only applicable to the same kind of steel. However, in practical engineering, it often occurs that two different types of steel need to be welded together. Therefore, it is very necessary to conduct a reheat crack sensitivity test on dissimilar steels before welding. Through the reheat crack sensitivity test of dissimilar steels, the optimal heat treatment temperature and the selection of the best welding materials for dissimilar steel welding can be determined, but at present There are no test methods and evaluation criteria for reheat crack susceptibility of dissimilar steels at home and abroad. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a test method, which can determine the optimum h...

Claims

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Application Information

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IPC IPC(8): B23K31/12
CPCB23K31/12
Inventor 卢征然
Owner SHANGHAI BOILER WORKS
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