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Thermal correction method of titanium alloy special-shaped tubular casting

A titanium alloy and thermal orthopedic technology, which is applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve problems such as uneven temperature, secondary cracking, and low efficiency, so as to improve efficiency, improve thermal orthopedic efficiency and consistency , to avoid the effect of secondary cracking

Active Publication Date: 2018-10-09
SHENYANG RES INST OF FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] What the present invention aims to solve is the problem of uneven temperature in the traditional gas flame orthopedic heating process, which is prone to secondary cracking and low efficiency. By means of induction heating, a special-shaped movable induction coil is designed according to the cross-sectional shape of a titanium alloy special-shaped tubular casting. , control the heating rate and heating temperature, and heat the casting as a whole, preventing the secondary cracking tendency caused by heat concentration

Method used

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  • Thermal correction method of titanium alloy special-shaped tubular casting
  • Thermal correction method of titanium alloy special-shaped tubular casting
  • Thermal correction method of titanium alloy special-shaped tubular casting

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Experimental program
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Embodiment 1

[0020] Firstly, determine the deformed part of the titanium alloy special-shaped tubular casting, and apply an anti-oxidation coating (KBC-12) of 0.2 mm to this part. Design and manufacture 5-turn induction coil according to the cross-sectional shape of the special-shaped tubular casting, fix the tubular casting and mold in the induction coil through tooling and fixtures, make the gap between the coil and the casting reach 25mm, move the induction coil to the deformed part through the transmission device, Gradually increase the induction power to 40kw within 60s, the frequency is 6000Hz, remove the induction coil after heating for 50s. Utilize a hydraulic press to apply an external force to the heating part, and the correcting external force is 1000N, so that the deformed part is plastically deformed, and the thermal rectification process of the present invention is completed. This rectification method can effectively avoid the occurrence of secondary cracking of the casting, a...

Embodiment 2

[0022] Firstly, determine the deformed part of the titanium alloy special-shaped tubular casting, and apply an anti-oxidation coating (KBC-12) of 0.3 mm to this part. According to the cross-sectional shape of the special-shaped tubular casting, a 3-turn induction coil is designed and manufactured, and the tubular casting and mold are fixed in the induction coil through tooling and fixtures, so that the gap between the coil and the casting reaches 30mm, and the induction coil is moved to the deformed part through the transmission device. Gradually increase the induction power to 50kw within 75s, the frequency is 5500Hz, remove the induction coil after heating for 40s. Utilize a hydraulic press to apply an external force to the heating part, and the correcting external force is 1100N, so that the deformed part is plastically deformed, and the thermal rectification process of the present invention is completed. This rectification method can effectively avoid the occurrence of seco...

Embodiment 3

[0024] Firstly, the deformation part of the titanium alloy special-shaped tubular casting is determined, and an anti-oxidation coating (KBC-12) of 0.4mm is coated on this part. According to the cross-sectional shape of the special-shaped tubular casting, the 7-turn induction coil is designed and manufactured. The tubular casting and the mold are fixed in the induction coil through tooling and fixtures, so that the gap between the coil and the casting reaches 35mm, and the induction coil is moved to the deformed part through the transmission device. Gradually increase the induction power to 60kw within 90s, the frequency is 5000Hz, remove the induction coil after heating for 30s. Utilize a hydraulic press to apply an external force to the heating part, and the correcting external force is 1300N, so that the deformed part is plastically deformed, and the thermal rectification process of the present invention is completed. This rectification method can effectively avoid the occurr...

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Abstract

The invention aims to solve the problems that the temperature of a traditional gas flame correcting and heating process is not uniform, secondary cracking is easily generated, the efficiency is low are solved, an induction heating mode is adopted, a special-shaped movable induction coil is designed according to the section shape of a titanium alloy special-shaped tubular casting, the heating rateand the heating temperature are controlled, the integral heating is carried out on the local part of the casting, and the secondary cracking tendency caused by heat concentration is prevented. A tool,a clamp and a mold are designed, and a deformation part is subjected to plastic deformation through a hydraulic press, so that the casting is corrected. The method is suitable for the thermal state correction of the titanium alloy tubular casting with the wall thickness less than or equal to 20 mm, and the heat correcting efficiency of the casting is greatly improved.

Description

technical field [0001] The invention relates to the technical field of casting of nonferrous metals, and in particular provides a thermal rectification method for titanium alloy special-shaped tubular castings. Background technique [0002] Titanium and titanium alloys have many advantages such as low density, high strength, corrosion resistance, high temperature resistance, low temperature resistance, non-magnetism, and small linear expansion coefficient. They are called "modern metals" and "space metals". They are not only used as structural materials, heat-resistant materials, and corrosion-resistant materials in aerospace, shipbuilding, petroleum processing, marine engineering, and architectural decoration, but also in superconducting materials, shape memory materials, and gas-absorbing hydrogen storage materials. The field of titanium has also attracted more and more attention, and titanium will also become the third metal that is used more and more by humans. [0003]...

Claims

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Application Information

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IPC IPC(8): B21D3/14B21D37/16
CPCB21D3/14B21D37/16
Inventor 娄延春赵军刘时兵张志勇史昆金磊
Owner SHENYANG RES INST OF FOUNDRY