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Method for improving yield deformation resistance of water heater glassed steel inner container welded joint

A water heater liner, welding joint technology, applied in welding equipment, workpiece edge parts, metal processing equipment and other directions, can solve the problems of low yield deformation resistance, easy cracking and leakage of welded joints, etc., to prolong fatigue life and overcome the yield of welded joints. Decreased deformation resistance and easy manipulation

Active Publication Date: 2018-10-09
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for improving the yield deformation resistance of the welded joints of the enamel steel inner tank of the water heater, which mainly solves the surface oxidation decarburization, low yield deformation resistance, and easy cracking and leakage of the welded joints existing in the welded joints of the enamel steel inner tank of the water heater. technical issues

Method used

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  • Method for improving yield deformation resistance of water heater glassed steel inner container welded joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, the enamel steel base plate of the water heater is a pickled steel plate with the brand name BTC330R produced by Baoshan Iron and Steel Co., Ltd., and the thickness of the steel plate is 1.8mm.

[0022] refer to figure 1 , a method for improving the yield deformation resistance of welded joints of enamelled steel tanks of water heaters, comprising the following steps:

[0023] 1) Prepare the blank of the water heater liner, cut the enamel steel base plate 1 for the water heater liner according to the size of the water heater liner, splice and group the cut enamel steel base plate 1 for the water heater liner in sequence to form an I-shaped groove for welding; The paired enamel steel substrates 1 are welded to form a weld seam 2 by using a single-sided one-time welding forming process by plasma fusion welding to make a water heater inner tank blank;

[0024] 2) Carry out degreasing and activation treatment on the surface of the water heater liner blank in seq...

Embodiment 2

[0028] Example 2, the enamel steel plate of the water heater is pickled steel plate with the brand name BTC330R produced by Baoshan Iron and Steel Co., Ltd., and the thickness of the steel plate is 1.6mm.

[0029] refer to figure 1 , a method for improving the yield deformation resistance of welded joints of enamelled steel tanks of water heaters, comprising the following steps:

[0030]1) Prepare the blank of the water heater liner, cut the enamel steel base plate 1 for the water heater liner according to the size of the water heater liner, splice and group the cut enamel steel base plate 1 for the water heater liner in sequence to form an I-shaped groove for welding; The paired enamel steel substrates 1 are welded to form weld seams 2 by TIG argon arc welding fusion welding single-sided one-time welding forming process, and the water heater liner blank is made;

[0031] 2) Degreasing and activating the surface of the water heater liner blank in sequence, first place the wat...

Embodiment 3

[0035] Example 3, the enamel steel plate of the water heater is pickled steel plate with the brand name BTC330R produced by Baoshan Iron and Steel Co., Ltd., and the thickness of the steel plate is 1.5 mm.

[0036] refer to figure 1 , a method for improving the yield deformation resistance of welded joints of enamelled steel tanks of water heaters, comprising the following steps:

[0037] 1) Prepare the blank of the water heater liner, cut the enamel steel base plate 1 for the water heater liner according to the size of the water heater liner, splice and group the cut enamel steel base plate 1 for the water heater liner in sequence to form an I-shaped groove for welding; The paired enamel steel substrates 1 are welded to form a weld 2 by using MAG gas-shielded welding fusion welding single-sided one-time welding forming process to make a blank for the inner tank of the water heater;

[0038] 2) Carry out degreasing and activation treatment on the surface of the water heater l...

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Abstract

The invention relates to a method for improving yield deformation resistance of a water heater glassed steel inner container welded joint. The method mainly solves the technical problems of surface oxidation decarburization, low yield deformation resistance, and cracking and water leakage of an existing water heater glassed steel inner container welded joint. The method for improving the yield deformation resistance of the water heater glassed steel inner container welded joint comprises the steps that 1, a water heater inner container blank is prepared; 2, the surface of the water heater inner container blank is degreased and activated in sequence; 3, the surface of the water heater inner container blank is coated with porcelain enamel through a wet coating method; and 4, the water heaterinner container blank is subjected to enameling burning treatment. The method is capable of improving the yield deformation resistance of the water heater glassed steel inner container welded joint by 5-15%, easy and convenient to operate and control and low in implementation cost.

Description

technical field [0001] The invention relates to a method for surface treatment of steel plate welding, in particular to a method for improving the yield deformation resistance of welded joints of enamel steel tanks of water heaters, and belongs to the technical field of welding processing of steel materials. Background technique [0002] The inner tank of the water heater is generally made of enamel steel substrate, such as pickled hot-rolled steel plate or cold-rolled steel plate, which is tailor-welded, enamelled on the inner surface and then enamelled and fired. In the manufacturing process of the water heater liner, the enamel steel substrate undergoes welding, 750-850°C high-temperature enamelling and other processes. The water heater liner is only enamelled on the inner surface, and the outer surface is exposed. The outer surface is oxidized and decarburized after high-temperature enamelling. The weak link of its welded joint is more prominent. [0003] The welded joi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/12B23K33/00
CPCB23K31/125B23K33/004
Inventor 王银军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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