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A kind of brazing method of titanium-steel plate butt joint with dual heat sources and low heat input

A brazing method and dual heat source technology, applied in the direction of welding/welding/cutting articles, welding equipment, manufacturing tools, etc., can solve the problem that it is difficult to effectively suppress Ti-Fe brittle compounds, it is difficult to suppress Ti-Fe intermetallic compounds, and it is difficult to obtain Reliable performance Titanium-steel joints and other issues, to achieve the effect of inhibiting the formation of brittle compounds, efficient and reliable connection, and easy operation

Active Publication Date: 2020-08-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the uneven heating of the joints further deteriorates the distribution of residual stress in the joints and deteriorates the performance of the joints
Yan Jiuchun from Harbin Institute of Technology used the TIG welding method to weld titanium alloy-stainless steel with Cu as the filler material. The results showed that it was difficult to effectively suppress the formation of Ti-Fe brittle compounds by using the TIG welding method, and it was difficult to obtain a titanium-steel joint with reliable performance
Once the base metal of the joint is melted, the interface is connected by a liquid / liquid interface, the atomic diffusion speed is fast, it is difficult to suppress the formation of Ti-Fe intermetallic compounds, and the performance of the joint is difficult to meet the requirements

Method used

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  • A kind of brazing method of titanium-steel plate butt joint with dual heat sources and low heat input
  • A kind of brazing method of titanium-steel plate butt joint with dual heat sources and low heat input
  • A kind of brazing method of titanium-steel plate butt joint with dual heat sources and low heat input

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specific Embodiment 1

[0032] Such as figure 1As shown, in this example, dual heat sources are used to heat the front and back of the joint at the same time, and the synergistic effect of the dual heat sources acting on the same molten pool is used to reduce the welding heat input, and to improve the energy distribution of the joint by controlling the energy parameters and position parameters of the two heat sources , to achieve a pure brazing connection of titanium-steel. The selected welding base materials are commercial TC4 (Ti6Al4V) plate and 304ss (1Cr18Ni9Ti) plate, both of thickness are 2mm, and the dual heat sources are MIG welding heat source (front heat source) and tungsten inert gas welding Welding heat source (reverse heat source); the front heat source is responsible for heating the workpiece, filling wire and providing gas protection, and the power supply adopts DC reverse connection; the reverse heat source is responsible for heating and gas protection on the back of the workpiece, an...

specific Embodiment 2

[0041] Such as figure 1 As shown, in this example, dual heat sources are used to heat the front and back of the joint at the same time, and the synergistic effect of the dual heat sources acting on the same molten pool is used to reduce the welding heat input, and to improve the energy distribution of the joint by controlling the energy parameters and position parameters of the two heat sources , to achieve titanium-steel brazing connection. The selected welding base metals are commercial TC4 (Ti6Al4V) plate and 304ss (1Cr18Ni9Ti) plate, both of thickness are 3mm, and the dual heat sources are melting inert gas shielded welding heat source (front heat source) and tungsten inert gas shielded welding Welding heat source (reverse heat source); the front heat source is responsible for heating the workpiece, filling wire and providing gas protection, and the power supply adopts DC reverse connection; the reverse heat source is responsible for heating and gas protection on the back ...

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Abstract

The invention belongs to the field of material processing engineering, and particularly relates to a double-heat-source low-heat-input soldering method for butt joint of a titanium-steel plate. Soldering connection of titanium and steel is achieved through double-heat-source low-heat-input welding; according to the different expansion coefficients of titanium and steel, heat distribution between the two metals is improved in the welding process by controlling energy parameters and position parameters of the two heat sources on the front side and the back side, and the probability of heat mismatching between titanium and steel is lowered; and generation of Ti-Fe brittle compounds is effectively restrained, the residual stress of a joint is effectively reduced, and efficient and reliable connection of the joint is achieved. Moreover, through direct heating and gas protection of the heat source on the back side to the back side of the joint, wetting and spreading of a filter metal on theback side of the joint is promoted, and the formation of a weld is greatly improved. In the welding process, the process similar to preheating before welding or heat treatment after welding can be provided by changing the relative positions of the heat source on the front side and the heat source on the back side in the welding direction. The double-heat-source low-heat-input soldering method is easy to operate and suitable for soldering, melt welding, melt soldering and the like.

Description

technical field [0001] The invention relates to the field of material processing engineering, in particular to a brazing method for butt jointing of titanium-steel plates with dual heat sources and low heat input. Background technique [0002] Titanium and titanium alloys have good low-temperature toughness and high-temperature strength, especially high specific strength, and are widely used in the manufacture of structures in the aerospace field. However, the high cost of titanium limits its popularization and application in the engineering field. As a widely used engineering material, stainless steel is cheap and has good thermal conductivity and mechanical properties. The welding of titanium and steel can not only make full use of the advantages and characteristics of their respective materials, but also reduce costs and improve economic benefits, and has broad application prospects. [0003] Although the connection of titanium-steel dissimilar metals has the dual advan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00B23K3/03B23K103/18
CPCB23K1/00B23K3/0384
Inventor 黄继华程志叶政杨健陈树海赵兴科
Owner UNIV OF SCI & TECH BEIJING