Novel low-cost and high-performance titanium alloy

A titanium alloy, low-cost technology, applied in high-performance titanium alloys, new low-cost fields, can solve the problems of long processing cycle, high material processing loss, high cost, and achieve good surface deformation ability, high forge deformation ability, and difficult The effect of forging cracks

Active Publication Date: 2017-07-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] Through the above analysis, it can be seen that part of the reason for the high cost of titanium alloy products is the co...

Method used

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  • Novel low-cost and high-performance titanium alloy
  • Novel low-cost and high-performance titanium alloy
  • Novel low-cost and high-performance titanium alloy

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Embodiment

[0047] According to the chemical composition, ingredients were prepared and the smelting electrode was prepared. The low-cost and high-performance titanium alloy was smelted by three vacuum self-consumption methods. The ingot size was 100kg. The three chemical compositions with better comprehensive performance are listed in Table 1. The 1#, 2#, 3# alloys, in which the V element is added through the Al-V master alloy, the Mo element is added through the Al-Mo master alloy, the Al element is added in the form of Al beans, and the Fe element is added in the form of Fe powder. The ingots melted three times under vacuum are forged at 1150°C, and the crystal grains are broken by upsetting at 1050°C, and then forged into a rod with a diameter of 120mm at 880°C in the α+β two-phase region, and finally forged at 880°C through the precision forging process into rods with a diameter of 50mm. The 50mm diameter bar was subjected to three different heat treatments, and the heat treatment sp...

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Abstract

The invention relates to a novel low-cost and high-performance titanium alloy which is suitable for production of multiple types of titanium alloy products such as rods, wires, plates, pipe fittings and the like and can be widely applied in the technical fields of aviation, oceans and the like. The alloy is prepared from composition elements in percentage by weight as follows: 3.5%-4.5% of Al, 2.0%-3.0% of V, 0.5%-1.5% of Fe, 0.5%-2.0% of Mo and the balance of Ti and inevitable impurity elements. Compared with a widely-applied Ti6Al4V alloy, the alloy has the characteristics as follows: (1) the raw material cost is relatively low, the hot working cracking tendency is low, and the yield of other product forms such as rods and the like from cast ingots is relatively high, so that the alloy cost is remarkably reduced; (2) the room-temperature tensile strength of the alloy after annealing is equivalent to that of the Ti6Al4V alloy, the room-temperature ductility and toughness of the alloy are higher, and the alloy is suitable for cold working and warm working forming of the plates and pipes.

Description

technical field [0001] The invention relates to a new type of low-cost, high-performance titanium alloy, which is suitable for being made into rods, wires, plates, pipes, etc., and can be widely used in technical fields such as aviation and marine. Background technique [0002] Due to its high specific strength and excellent corrosion resistance, titanium alloys have been widely used in aviation, aerospace, marine and other fields. Among them, Ti6Al4V alloy is more typical, but the amount of titanium alloy used in different fields is significantly lower than that of aluminum. Alloy, steel and other structural materials, the main barrier to limit the wide application of titanium alloy is its relatively high price. Reducing its cost under the premise of maintaining the performance of titanium alloy can play a significant role in promoting the popularization and application of titanium alloy. [0003] The high cost of titanium alloy is directly related to the cost of raw mater...

Claims

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Application Information

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IPC IPC(8): C22C14/00
CPCC22C14/00
Inventor 马英杰雷家峰杨锐邱建科吉海宾
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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