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Weldability test method for evaluating toughness of welding heat affected zone of medium-thickness plate

A technology of welding heat-affected zone and test method, which is applied in the direction of welding/welding/cutting items, welding equipment, welding accessories, etc., can solve the problems of poor accuracy, achieve high accuracy, save man-hours, and reduce the amount of welding wire filling.

Pending Publication Date: 2022-02-11
SD STEEL RIZHAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of poor accuracy of the toughness test of the welding heat-affected zone of the medium-thick plate, the present invention provides a weldability test method for evaluating the toughness of the welding heat-affected zone of the medium-thick plate, which can achieve high efficiency, low material consumption, and accurate evaluation of the steel plate The purpose of heat-affected zone toughness

Method used

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  • Weldability test method for evaluating toughness of welding heat affected zone of medium-thickness plate
  • Weldability test method for evaluating toughness of welding heat affected zone of medium-thickness plate
  • Weldability test method for evaluating toughness of welding heat affected zone of medium-thickness plate

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Embodiment 1

[0032] A weldability test method for evaluating the toughness of the heat-affected zone of medium-thick plate welding, comprising the following steps:

[0033] Prepare two test steel plates of the same size to be evaluated, the thickness t1 of steel plate 1 is 50mm, the thickness t2 of steel plate 2 is 50mm, and the steel type is Q690D; adopt 82% Ar+18% CO 2 Gas shielding, solid core wire with a diameter of Ф1.2mm; the first steel plate does not process the groove, and the second steel plate processes the V-shaped groove, and the assembly form is as follows figure 2 As shown, the assembly gap t3 is 0-2mm, the steel plate liner is assembled on the back, the groove is filled by multi-layer multi-pass welding, and the welding is automated with large-scale heat input, and the back does not need to be cleaned and repaired.

[0034] 1. Preparation before welding

[0035] according to figure 2 Cut the test plate according to the pattern. The steel plate 1 does not process the gro...

Embodiment 2

[0042] A weldability test method for evaluating the toughness of the heat-affected zone of medium-thick plate welding, comprising the following steps:

[0043] Prepare two test steel plates of the same size to be evaluated, the thickness t1 of steel plate 1 is 80mm, the thickness t2 of steel plate 2 is 80mm, and the steel type is Q550D; use 82% Ar+18% CO 2 Gas shielding, solid core wire with a diameter of Ф1.2mm; steel plate 1 does not process grooves, and steel plate 2 processes K-shaped grooves. The assembly form is as attached image 3 As shown, the assembly gap t3 is 0 ~ 2mm, and the steel plate liner is assembled on the back, using multi-layer multi-pass welding, automatic large-scale energy welding, and there is no need for root cleaning and repair welding on the back.

[0044] 1. Preparation before welding

[0045] according to image 3Cut the test plate according to the pattern. The first steel plate does not process the groove, and the second steel plate processes t...

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Abstract

The invention belongs to the technical field of medium-thickness plate welding, and relates to a weldability test method for evaluating the toughness of a welding heat affected zone of a medium-thickness plate. The method comprises the following steps that: two to-be-evaluated test steel plates with the same size are prepared, a groove is machined in one steel plate, a single-sided V-shaped or K-shaped groove is machined in the other steel plate, and a butt-joint connector is assembled; gas metal arc welding is adopted for welding, and a welding gun is inclined by a certain angle to conduct multi-layer and multi-pass welding on the welding seam of the butt-joint connector; and large heat input is selected as a parameter, and mechanical property inspection is conducted on the welded connector after welding is completed. With the method adopted, the problems that the groove machining amount and the welding filling amount are large, deformation is not easy to control, and welding performance detection is inaccurate in the prior art can be solved.Compared with an existing welding method for detecting the weldability of a steel plate through a double-face V-shaped groove butt-joint connector, the method of the invention is more efficient, consumes less materials, and accurately evaluates the weldability of the steel plate.

Description

technical field [0001] The invention belongs to the technical field of plate welding, and in particular relates to a weldability test method for evaluating the toughness of a heat-affected zone in plate welding. Background technique [0002] The evaluation of the toughness of the heat-affected zone in the welding of medium and heavy plates is mostly carried out by means of test plate welding and joint performance testing. A large number of medium and heavy plates are welded by double V-groove melting electrode gas shielded welding for backing, filling and covering methods. According to the actual welding groove welding, there are limitations in testing the joint toughness. Such as figure 1 As shown, the traditional assessment of the weldability of steel plates usually uses double V-groove butt joints, which are welded by metal gas shielded welding. The double V-groove angle is large, the filling amount of welding wire is large, and more welding consumables are used; traditi...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/32B23K101/18
CPCB23K9/173B23K9/32B23K2101/18
Inventor 侯东华丛林周兰聚刘坤栾彩霞胡晓英张迪胡华东李柏君陈传磊
Owner SD STEEL RIZHAO CO LTD
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