Laser welding process for brass and steel
A laser welding, steel technology, applied in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems of reduced welding efficiency, instability, inconsistent melting conditions, etc., to improve stability, avoid boiling, improve The effect of uniformity and flatness
Active Publication Date: 2021-12-21
GW (SHANGHAI) LASER TECH CO LTD
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Problems solved by technology
[0005]
However, under the action of fiber laser, the zinc element in brass evaporates and burns seriously, which may easily cause defects such as weld sag and weld welding process instability; moreover, the thermal physical properties of brass and steel are different, and the melting conditions are inconsistent. Welding caused great difficulty
In the prior art (such as CN113134664A), in order to solve the evaporation of zinc, it is often used to avoid direct action of heat on the base metal, and the base metal mainly relies on the heat transfer of the molten pool metal to heat and melt; but this will lead to a reduction in welding efficiency
In the prior art, in order to prevent the reduction of zinc content, welding wires containing silicon, Fe, Sn and other elements are mostly used to prevent the oxidation and evaporation of zinc in the molten pool, but this not only complicates the use process, but also leads to the mixing of redundant elements
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[0023] S1: prepare brass plates and steel plates for welding; in some embodiments, the brass plates are H62 brass plates;
[0024] S2: Perform galvanizing treatment on the surface of the steel, wherein the galvanizing process includes but not limited to mechanical galvanizing, electric galvanizing, and hot-dip galvanizing; in some embodiments, SGCC hot-dip galvanized steel sheets can be used specifically. The galvanized area should at least include the welding melting area, and the entire plate can also be galvanized. The thickness of the galvanized plate refers to the national standard GB / T13912-2002, and is generally above 35 μm.
[0025] In some embodiments, the specific specifications of the brass plate and galvanized steel plate can be 100×50×2mm;
[0026] S3: Arrange the brass plates and galvanized steel plates together in a butt joint form, (such as figure 1 As shown) the welding area is divided into the first area on the steel plate side and the second area on the bra...
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Abstract
According to a laser welding process for brass and steel, zinc plating treatment is conducted on the surface of steel, deep penetration welding is conducted on the brass side, liquid brass is spread on the surface of the steel in a swing welding mode, and smooth, firm and uniform welding of the brass and the steel is achieved.
Description
technical field [0001] The invention relates to a welding process of brass and steel, and provides a method for welding brass and steel with an optical fiber laser. Background technique [0002] Brass has good thermal and electrical conductivity, but its mechanical properties (such as tensile strength and hardness) are poor, so it is not suitable for some situations that need to withstand high loads. The mechanical properties of steel are much higher than that of brass, but its thermal conductivity and electrical conductivity are poorer than brass. Therefore, the combination of brass and steel not only takes into account the excellent thermal and electrical conductivity of brass, but also takes into account the excellent mechanical properties of steel. For example, the pipes in the chiller and the heat exchanger of the air conditioner all use brass and steel welded structures. [0003] At present, the welding methods for brass and steel mainly include brazing, gas welding,...
Claims
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IPC IPC(8): B23K1/005B23K1/20B23K103/22
CPCB23K1/0056B23K1/20B23K2103/22
Inventor 顾佳星张丙涛刘进辉贺辉丁建武
Owner GW (SHANGHAI) LASER TECH CO LTD