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A furnace brazing method for 1cr18ni9ti stainless steel pipe and 5a06 aluminum alloy pipe

A stainless steel tube, aluminum alloy tube technology, applied in welding equipment, tubular articles, metal processing equipment, etc., can solve the problems of low connection strength, low reliability of welding quality, etc., to improve forming quality, reduce welding heat input, The effect of avoiding thermal cracks

Active Publication Date: 2020-05-08
XIAN SPACE ENGINE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is: to overcome the deficiencies of the prior art, solve the problems of low joint strength of the weld seam connecting 1Cr18Ni9Ti stainless steel pipe and 5A06 aluminum alloy pipe, and low reliability of welding quality, and propose a 1Cr18Ni9Ti stainless steel pipe Furnace brazing method with 5A06 aluminum alloy pipe, the method adopts furnace brazing welding process to realize fusion brazing connection of 1Cr18Ni9Ti stainless steel pipe and 5A06 aluminum alloy pipe

Method used

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  • A furnace brazing method for 1cr18ni9ti stainless steel pipe and 5a06 aluminum alloy pipe
  • A furnace brazing method for 1cr18ni9ti stainless steel pipe and 5a06 aluminum alloy pipe
  • A furnace brazing method for 1cr18ni9ti stainless steel pipe and 5a06 aluminum alloy pipe

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Embodiment

[0030] Such as figure 1 and figure 2 As shown, the wall thickness of 1Cr18Ni9Ti stainless steel pipe is 2mm, and the wall thickness of 5A06 aluminum alloy pipe is 2mm.

[0031] (1) Process 11mm long external thread on the part of 1Cr18Ni9Ti stainless steel pipe to be welded, and then pickle the surface of 1Cr18Ni9Ti stainless steel pipe to be welded. 3μm nickel layer;

[0032] (2) Process an internal thread of 11mm long on the 5A06 aluminum alloy tube to be welded, and then process a welding groove on the surface of the 5A06 aluminum alloy tube to be welded. The angle of the groove is 30°, and the blunt edge is not greater than 1mm. Alkali cleaning, the surface finish of the welding groove after alkali cleaning is 3.2μm;

[0033] (3) Screw the position to be welded of the 1Cr18Ni9Ti stainless steel pipe after step (1) pretreatment into the groove of the 5A06 aluminum alloy pipe after step (2) pretreatment, the gap is not more than 0.15mm, and obtain the workpiece to be wel...

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Abstract

The invention relates to a method for brazing a 1Cr18Ni9Ti stainless steel tube and a 5A06 aluminum alloy tube in a furnace, which is suitable for welding the lap joint structure of 1Cr18Ni9Ti stainless steel with a wall thickness of δ1.5mm to 5mm and a 5A06 aluminum alloy with a wall thickness of δ1.5mm to 5mm. . The invention solves the technical problem of low welding strength of argon arc welding of 1Cr18Ni9Ti stainless steel and 5A06 aluminum alloy, reduces the probability of welding defects such as penetration cracks of liquid aluminum inside the weld to the steel side, and greatly improves the connection strength.

Description

technical field [0001] The invention relates to a method for brazing a 1Cr18Ni9Ti stainless steel tube and a 5A06 aluminum alloy tube in a furnace, which is suitable for welding the lap joint structure of 1Cr18Ni9Ti stainless steel with a wall thickness of δ1.5mm to 5mm and a 5A06 aluminum alloy with a wall thickness of δ1.5mm to 5mm. . Background technique [0002] At this stage, manual argon arc welding is used to weld 1Cr18Ni9Ti stainless steel pipes and 5A06 aluminum alloy pipes. The method is as follows: grind the surface to be welded on the steel side, and then use aluminum-silicon welding wire to weld the lap joint between the 1Cr18Ni9Ti stainless steel pipe and the 5A06 aluminum alloy pipe by manual argon arc welding. [0003] 5A06 aluminum alloy dissipates heat quickly. In order to ensure good fusion of the aluminum side and the formation of an effective molten pool at the welded joint, low welding speed and high current are generally used for manual argon arc weld...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20B23K103/18B23K101/06
CPCB23K1/008B23K1/20
Inventor 蔡强顺王继长向彦君靳虎平任宣霖赵小青
Owner XIAN SPACE ENGINE CO LTD
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