Special Ti-6Al-3V welding wire for Ti-6Al-4V ELI titanium alloy and machining process of special Ti-6Al-3V welding wire

A technology of ti-6al-4veli and processing technology, which is applied in the field of titanium alloy welding wire, can solve the problems that the quality of welds cannot meet the requirements of assessment indicators, etc., and achieve the improvement of welding quality and true sphericity, and the improvement of mechanical properties. Effect

Inactive Publication Date: 2015-09-23
BAOJI TITANIUM IND CO LTD
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Problems solved by technology

At present, there is no special titanium alloy welding wire with excellent compatibility with Ti-6Al-

Method used

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  • Special Ti-6Al-3V welding wire for Ti-6Al-4V ELI titanium alloy and machining process of special Ti-6Al-3V welding wire
  • Special Ti-6Al-3V welding wire for Ti-6Al-4V ELI titanium alloy and machining process of special Ti-6Al-3V welding wire

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Embodiment Construction

[0021] The embodiments described below are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work belong to the protection scope of the present invention

[0022] a) According to the design composition wt.% of Ti-6Al-3V welding wire: Al 6.0, V 3.0, Fe<0.20, O<0.13, the balance is Ti. Calculate the raw material weight ratio of Al-V master alloy, pure metal aluminum and sponge titanium, then put the prepared raw materials into the vacuum consumable electric arc furnace, and make Φ500mm~Φ800mm titanium alloy castings through 3 times of vacuum consumable melting ingot. According to the test, the alloy composition wt.% of titanium alloy ingot is: Al 6.1, V 2.9, Fe 0.02, O 0.06-0.07, and the balance is Ti.

[0023] b) The Φ600mm titanium alloy ingot is forged into a Φ150mm titanium alloy billet by using a fast forging mach...

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Abstract

The invention provides a special Ti-6Al-3V welding wire for Ti-6Al-4V ELI titanium alloy and a machining process of the special Ti-6Al-3V welding wire. The special Ti-6Al-3V welding wire includes the alloy components of, by weight, 5.5-6.75% of Al, 2.5-4.5% of V, smaller than 0.20% of Fe, smaller than 0.13% of O and the balance Ti. The machining process of the special Ti-6Al-3V welding wire includes the following steps that a, the raw material weight ratio of Al-V intermediate alloy to pure metal aluminum to titanium sponge is calculated according to the design components of the welding wire, and the raw materials are smelted into ingots through vacuum arc remelting; b, the ingots are forged into bar billets; c, the bar billets are rolled into bars; d, the bars are rolled into wire billets; e, the wire billets are stretched; f, the wire billets are straightened, descaled, polished and ground; g, the wire billets are thermally treated and then stretched into wires; h, vacuum annealing is conducted on the wires after alkaline washing and acid washing are conducted on the wires; i, the wires are straightened and then cut into straight wires; j, the straight wires are ground into finished products. Through the adjustment of the content of main alloy elements and impurity elements and the reasonable production process, the titanium welding wire with better mechanical performance matching performance with the Ti-6Al-4V ELI titanium alloy is produced, and the performance of a weld joint of the welding wire can meet the index requirements of a manned cabin.

Description

technical field [0001] The invention relates to the technical field of titanium alloy welding wire, in particular to a special Ti-6Al-3V welding wire for Ti-6Al-4V ELI titanium alloy and a processing technology thereof. Background technique [0002] The manned cabin of the manned submersible is welded with multiple Ti-6Al-4V ELI titanium alloy melon petals or two integrally formed hemispheres. The composition and quality of the welding wire are the fundamental guarantee of the welding quality and are directly related to the manned cabin. Safety of working underwater. At present, there is no special titanium alloy welding wire with excellent compatibility with Ti-6Al-4V ELI titanium alloy. The quality of the welds cannot meet the requirements of the assessment indicators. Therefore, it is of great significance to develop a special titanium alloy welding wire with excellent compatibility with Ti-6Al-4V ELI titanium alloy. Contents of the invention [0003] The invention p...

Claims

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Application Information

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IPC IPC(8): B23K35/32B23K35/40C22C14/00
CPCB23K35/325B23K35/0261B23K35/40B23K2103/14C22C14/00
Inventor 薛虎明雒水会马元杰王永梅张小博张永强乔璐杨国庆
Owner BAOJI TITANIUM IND CO LTD
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