Technology method for welding brass H62 and low-alloy cast steel G20Mn5 dissimilar materials

A low-alloy cast steel and dissimilar material technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem that the base metal and welding material on the cast steel side are not easy to melt and combine, the manual operation is difficult, and the welding quality is unstable. and other problems to achieve the effect of reducing the probability of arc crater cracks, optimizing the way and method of arc crater, and stable welding quality

Active Publication Date: 2021-07-20
XUZHOU XCMG MINING MACHINERY CO LTD
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AI Technical Summary

Problems solved by technology

During the welding process, the base metal on the brass side and the welding consumables are first melted and combined, and the base metal on the cast steel side and the welding consumables are not easy to melt and combine, and the fusion effect is poor, and unfused defects are likely to occur
Common welding methods between brass and castings are gas welding and manual arc welding, but the manual work is very difficult, prone to problems such as unfused on one side, poor welding formation, unstable welding quality, and low production efficiency

Method used

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Embodiment Construction

[0021] In order to further illustrate the technical details and advantages of the present invention, it will now be described in conjunction with embodiments.

[0022] A process method for welding brass H62 and low-alloy cast steel G20Mn5 dissimilar materials, adopting a manual argon tungsten arc welding method, comprising the following steps:

[0023] (1) Welding temperature: Preheat the 75mm area on both sides of the weld, preheat 150-200°C before welding, and the interlayer temperature during welding is higher than the preheating temperature;

[0024] (2) Welding material: SCu6560 (S211) silicon bronze welding wire, the diameter of silicon bronze welding wire is 2.5mm;

[0025] (3) The protective gas is pure argon with a purity of not less than 99.99%;

[0026] (4) Working method: use the left welding method and short arc welding, arc starting and back welding 15-20mm, the welding arc acts on the welding wire or the cast steel side, and the brass side is heated and melted ...

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Abstract

The invention discloses a technology method for welding brass H62 and low-alloy cast steel G20Mn5 dissimilar materials. A manual argon tungsten-arc welding method and an S211 silicon bronze welding wire with the diameter of phi 2.5 are adopted, preheating is performed at 150-200 DEG C before welding, the situation that the interlayer temperature is higher than the preheating temperature in the welding process is guaranteed, heat is preserved for 2 hours after welding, and then dye penetrant inspection is performed. The argon tungsten-arc welding method is adopted, the technological means is simple, welding forming is attractive, the fusion quality of the root of a welding joint is good, the requirement for the skill level of workers is not high, the welding quality is stable, the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a process method for welding brass H62 and low-alloy cast steel G20Mn5 dissimilar materials. Background technique [0002] Mobile cone crushers are widely used in mining production and construction waste treatment industries. The main frame is the core component of the cone crushing station, mainly composed of lower frame (material G20Mn5), frame seat lining (material is copper H62) and other parts. Tailored and welded. The main machine is subjected to high-speed impact and severe wear of various foreign materials during the crushing process, and its quality directly determines the working life of the crushing station. Therefore, the welding process level of brass H62 and low-alloy cast steel G20Mn5 dissimilar materials has a great impact on the crushing station. The life of the whole machine has a very important impact. [0003] Brass H62 and cast steel G20Mn5 are two materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235
CPCB23K9/16B23K9/235
Inventor 武树成李柏松魏守盼王国友朱明涛侍孝建
Owner XUZHOU XCMG MINING MACHINERY CO LTD
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