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Laser wire filling and butt welding method for titanium-steel composite plate with T2 red copper serving as transition layer

A technology of laser wire filling and composite boards, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of low joint strength, plasticity and toughness, and incomplete penetration, so as to reduce thermal stress mismatch and residual stress The effect of small size and high welding precision

Active Publication Date: 2016-11-16
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

After welding, a large number of cracks and defects were found in the joint: V / Ti interface has incomplete penetration defects; Cu / V and CP-Ti / Q345 / V have a large number of cracks; CP-Ti / Q345 / V bonding interface can be observed TiFe brittle phase
The results show that a certain amount of brittle phases are generated in both TiNi welds and NiCrMo welds, which lead to lower joint strength and ductility

Method used

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  • Laser wire filling and butt welding method for titanium-steel composite plate with T2 red copper serving as transition layer
  • Laser wire filling and butt welding method for titanium-steel composite plate with T2 red copper serving as transition layer
  • Laser wire filling and butt welding method for titanium-steel composite plate with T2 red copper serving as transition layer

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Embodiment 1

[0057] Two titanium-steel composite plates (the material combination is TA1 / Q235B, the size is 70×30×(1+8)mm) are processed into V-shaped groove 3 and stepped structure 4, and the angle of V-shaped groove 3 is 30°, the titanium plate 2 in the stepped structure 4 protrudes 1 mm outside the steel substrate 1, and the upper surface of the stepped structure 4 is all exposed titanium, and the specific dimensions are as follows Figure 4 As shown, sand with sandpaper and clean the surface to be welded with acetone to remove the oxide film and oil on the metal surface and expose fresh metal. Butt joint assembly of two titanium-steel composite plates, control the butt joint gap between the stepped structures 4 on both sides to be less than 0.1mm, and the amount of misalignment is also less than 0.1mm. Use the IPG-4000 fiber laser, first with the laser power P=4kW, The welding parameters of welding speed v=5m / min, defocus amount f=0, and beam inclination angle α=5° are used for laser b...

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Abstract

The invention discloses a laser wire filling and butt welding method for a titanium-steel composite plate with T2 red copper serving as a transition layer. The method comprises the following steps: (1) machining two titanium-steel composite plates to be subjected to butt welding; (2) butting and assembling the two titanium-steel composite plates to be subjected to butt welding; (3) performing laser backing welding on a gap between titanium plates of the two titanium-steel composite plates to be subjected to butt welding to form a laser backing welding line; (4) covering the lower surface of the laser backing welding line with titanium welding wires by adopting laser wire filling welding to form a titanium wire welding line, and overlaying a layer of T2 red copper at the bottom of a V-shaped groove to form a transition layer welding line; (5) overlaying a first layer of steel welding bead on the upper surface of the transition layer welding line; and (6) overlaying a second layer of steel welding bead on the upper surface of the first layer of steel welding bead by adopting the laser wire filling method. According to the method, the problems of high welding heat stress and serious mismatch of heat stress between metal layers due to the formation of brittle intermetallic compounds in the butt welding process of the titanium-steel composite plate can be effectively solved.

Description

technical field [0001] The invention belongs to the field of welding technology and relates to a laser wire-filled butt welding method for a titanium-steel composite plate with T2 red copper as a transition layer. Background technique [0002] Titanium is widely used in many industrial fields because of its high specific strength, good corrosion resistance, good wear resistance, and good high and low temperature performance. However, because titanium is a rare metal and its price is high, its use is largely limited. App promotion. Steel has good comprehensive mechanical properties, good weldability, good thermal stability, and its price is low, so it is the most widely used metal structure material. However, steel has poor corrosion resistance and is also dense. Titanium-steel composite plate is a bimetallic plate composite material formed by layering and combining titanium plate and steel plate by explosive welding and other means. The titanium-steel composite plate can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/211B23K26/342B23K26/60B23K26/21
CPCB23K26/21B23K26/211B23K26/342B23K26/60
Inventor 张林杰白清林宁杰杨健楠裴俊宇刘江哲张建勋
Owner XI AN JIAOTONG UNIV
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