Heat treatment control method and device of titanium alloy forging parts
A control method and titanium alloy technology, which is applied in the field of heat treatment, can solve the problems of high cost, difficulty of heat treatment and repair, difficulty of returning titanium alloy forgings to furnace and remelting, etc.
Inactive Publication Date: 2019-04-02
SHAANXI HONGYUAN AVIATION FORGING
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Problems solved by technology
[0003] However, titanium alloys contain scarce elements such as molybdenum, vanadium, chromium, niobium and other β-stabilizers, which lead to high costs; and titanium alloy forgings are difficult to remelt and heat treatment is more difficult
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[0036] A Ti60 titanium alloy forging, 11 pieces, external dimensions Complete the heat treatment according to the following steps, all qualified after physical and chemical testing, the pass rate is 100% at one time:
[0037] Step 1: Cut 5 small test blocks of 15 mm square from the forged titanium alloy forging, and mark ①, ②, ③, ④, ⑤ respectively. Heat these five small test blocks (resistance furnace), set the temperature at 10°C to 80°C below the phase transition point, and place the small test blocks according to the attached figure.
[0038] Step 2: After heat treatment, 5 small test blocks were polished and corroded, and their microstructures (primary α content and secondary α form) were observed. The average α content was 25%, and the secondary α form was flakes. Based on this, it is judged that the original set temperature is too low.
[0039] Step 3: Adjust the set temperature of heat treatment and raise it by 3°C, and then heat treat the same batch of forgings.
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The embodiment of the invention provides a heat treatment control method and device of titanium alloy forging parts. The heat treatment control method includes the steps that in a heating furnace, n small test blocks are heat treated according to an original set temperature; the small test blocks are equal-sized square blocks cut from the titanium alloy forging parts in the same forging state; then small test blocks are placed at different points in the effective zone of the heating furnace; the primary alpha contents of the n small test blocks are detected; and according to the primary alphacontents of the n small test blocks, whether the original set temperature needs to be adjusted or not and the adjusting direction and the adjusting amount when adjustment is required are determined.According to the embodiment of the heat treatment control method and device of the titanium alloy forging parts, the one-time qualification rate of heat treatment of the titanium alloy forging parts is increased.
Description
technical field [0001] The invention belongs to the technical field of heat treatment, and relates to a heat treatment control method and device for a titanium alloy forging. Background technique [0002] With the continuous growth of market demand, titanium alloy forgings are widely used in aerospace, petrochemical, marine automobile, medical Equipment and other industries have become indispensable structural materials for the military industry. [0003] However, titanium alloys contain rare elements such as molybdenum, vanadium, chromium, niobium and other β-stabilizers, resulting in high costs; and titanium alloy forgings are difficult to remelt and heat treatment is more difficult. Therefore, it is an important task to study the high-quality, high-efficiency and low-cost production of titanium alloy forgings. Then, this paper starts with improving the first pass rate of heat treatment of titanium alloys to achieve this goal. Contents of the invention [0004] The obj...
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IPC IPC(8): C22F1/18C21D11/00
CPCC22F1/183C21D11/00
Inventor 牛晓恒秦卫东姚彦军邹斌
Owner SHAANXI HONGYUAN AVIATION FORGING