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Metal material welding-rolling integrated composite forming method

A metal material and composite forming technology, applied in the field of material engineering, to achieve the effect of expanding the range of welding and rolling process parameters, solving softening problems, and improving softening problems

Inactive Publication Date: 2020-06-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention mainly adopts the method of rolling the reinforcement area of ​​the welded joint at the same time during the welding process. This method can solve the softening problem of the welded joint, and can also improve welding defects such as pores and cracks, and has good process adaptability and high production efficiency

Method used

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  • Metal material welding-rolling integrated composite forming method

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Effect test

Embodiment 1

[0040] Example 1 1.5mm thick 6061-T6 aluminum alloy welding and rolling compound forming example

[0041] Such as figure 1 As shown, a double-roll rolling device is used to implement welding-rolling composite forming. In the figure, 1 is a wire feeder; 2 is a welding gun; 3 is an upper roll; 4 is a lower roll.

[0042] Welding object is plate thickness H 1 = 1.5mm 6061-T6 aluminum alloy (that is, the metal material 5 is implemented in the figure), and the size of the test plate is 100mm×50mm×1.5mm. The welding heat source (welding gun 2) adopts laser-tungsten argon arc (TIG) filler wire butt hybrid welding heat source. The main welding parameters are: YAG pulse laser average power 900W, tungsten argon arc welding welding current 100A, tungsten electrode height 2mm, welding Speed ​​600mm / min, wire feeding speed 6500mm / min, welding wire grade is ER5356, wire feeding angle 20°, welding joint residual height H 2 Is 2.0mm, the distance between the laser action point and the roll is D=2...

Embodiment 2

[0044] Example 2 Composite forming example of 2.5mm thick 5083-O aluminum alloy sheet and 2.5mm thick 6061-T6 aluminum alloy sheet

[0045] The welding objects are 5083-O aluminum alloy plate and 6061-T6 aluminum alloy plate with plate thickness H1=2.5mm. The size of the test plate is 200mm×100mm×2.5mm. The welding heat source adopts cold metal transition arc (CMT) welding heat source. The main welding parameters are: cold metal transition arc current 120A, arc voltage 14.8V, welding speed 550mm / min, wire feeding speed 8000mm / min, welding wire grade is ER5356, after welding Welding joint residual height H 2 Is 2.4mm, the distance between the arc welding torch and the roller is D=200mm, and the distance between the two rollers of the rolling process is H R =2.5mm.

[0046] Using the above-mentioned welding-rolling composite forming method, the tensile strength of the obtained butt-joined specimen can reach 100% of the 5083-O base metal and more than 90% of the 6061-T6 base metal; th...

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Abstract

The invention provides a metal material welding-rolling integrated composite forming method. The metal material welding-rolling integrated composite forming method is a welding-rolling integrated composite forming method with the short process, high efficiency and high performance integrated and is characterized in that in the welding process, a low heat input wire-filling welding method is adopted to cooperate an optimized welding technology, so that a welding joint with reinforcement is obtained, and a softened area, with the weakest performance, of the welding joint gets close to a weldingseam; meanwhile, a rolling device is adopted to roll a reinforcement area of the welding joint; and by setting the distance between a welding gun and a roller / between the roller and the surface of a metal specimen, the rolling temperature and the rolling deformation amount are cooperatively regulated and controlled, and the structures and performance of all areas of the welding joint are preciselyregulated and controlled through plastic flowing generated by the reinforcement of the welding joint in the rolling process and the deformation strengthening effect of the welding joint. The softening problem of the welding joint can be solved through the metal material welding-rolling integrated composite forming method, the metal material welding-rolling integrated composite forming method is also suitable for eliminating the welding defects such as macro and micro pores and cracks in the welding joint, and the comprehensive mechanical performance of the metal material welding joint is substantially improved.

Description

Technical field [0001] The invention belongs to the technical field of material engineering, and in particular, relates to a metal material integrated welding-rolling composite forming method. Background technique [0002] Welding is one of the basic technologies in the field of advanced manufacturing. It is widely used in aviation, aerospace, nuclear energy, ships, automobiles and other fields. It is irreplaceable in national defense security and national construction. However, it is undeniable that the welded joint is still a weak position for key parts of the country's major equipment. For example, heat treatment strengthened metal materials, mainly including high-strength aluminum alloys using the "Solid Solution + Aging" heat treatment process, quenched and tempered high-strength steel and ultra-high-strength steel, and other metal materials are easily affected by the welding thermal cycle during the welding process. The problem of softening of the welding heat-affected zon...

Claims

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Application Information

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IPC IPC(8): B23P23/00B23P15/00
CPCB23P15/00B23P23/00
Inventor 宋刚张兆栋王红阳刘黎明王泽杰
Owner DALIAN UNIV OF TECH
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