Welded structure of quenching and tempering steel alloy with middle carbon and low-alloy steel and method thereof

A low-alloy steel and welding method technology, which is applied to the welding structure of medium-carbon quenched and tempered alloy steel and low-alloy steel, and the welding field of medium-carbon quenched and tempered alloy steel and low-alloy steel, which can solve weld toe cracks, structural failure, etc. problems, to achieve good mechanical properties, improve component performance, and simple steps

Inactive Publication Date: 2008-02-27
SHANGHAI HEAVY MACHINERY PLANT
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Problems solved by technology

Because it is at the stop end of the gap between the medium-carbon quenched and tempered alloy steel and the low-low alloy steel, the stress concentration acts here, and it is very easy to produce weld toe cracks, resulting in structural failure.

Method used

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  • Welded structure of quenching and tempering steel alloy with middle carbon and low-alloy steel and method thereof
  • Welded structure of quenching and tempering steel alloy with middle carbon and low-alloy steel and method thereof

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Embodiment Construction

[0018] The welded structure of medium carbon quenched and tempered alloy steel and low alloy steel of the present invention is shown in Figure 3, comprises medium carbon quenched and tempered alloy steel part, low alloy steel part and welded joint, and described welding part is filled with welding meat 4, in the There is also a transition layer 8 between the welding meat and the medium carbon quenched and tempered alloy steel and the welding meat and the low alloy steel. The composition of the transition layer includes, by weight, carbon≤0.12%, manganese≤1.60%, silicon≤0.75%, sulfur≤0.035%, phosphorus≤0.04%, and the rest is iron. A groove is provided at the contact position between the medium-carbon quenched and tempered alloy steel part and the low-alloy steel part, and the welding part composed of the grooves on both sides is filled with the weld metal 4 . On both sides of the interface between the welded meat 4 and the groove, there will be a heat-affected zone 5. In the he...

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Abstract

The invention discloses a welding structure of medium carbon tempering alloy steel and low alloy steel, which comprises the following parts: medium carbon tempering alloy steel element, low alloy steel element and welding joint, wherein the welding joint is filled with welding meat; one transition layer is set between the welding meat and the medium carbon tempering alloy steel and between the welding meat and low alloy steel separately. The invention has better mechanic property with fastened and reliable component, which is easy to realize to improve the component property greatly.

Description

technical field [0001] The invention relates to a welding structure of alloy steel, in particular to a welding structure of medium carbon quenched and tempered alloy steel and low alloy steel. The invention also relates to a welding method of medium-carbon quenched and tempered alloy steel and low alloy steel. Background technique [0002] In today's industrial equipment, especially in large industrial machinery, metal components often use medium carbon quenched and tempered alloy steel such as 42CrMo, and these medium carbon quenched and tempered alloy steel often need to be welded with some low alloy steel, including low carbon steel . As shown in FIG. 1 , these welded structures include a medium carbon quenched and tempered alloy steel part 1 , a low alloy steel part 2 and a welded joint 3 where the medium carbon quenched and tempered alloy steel contacts the low alloy steel. Due to the high carbon content of medium carbon quenched and tempered alloy steel, the weldabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/00F16B5/08
Inventor 李荣涛陈磊冒琳艳
Owner SHANGHAI HEAVY MACHINERY PLANT
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