Forging method of double alloy wheel disc of engine
A double alloy and engine technology, applied in the direction of engine components, mechanical equipment, etc., can solve the problem of low tensile strength of the engine wheel, and achieve the effect of improving the tensile strength
Inactive Publication Date: 2016-01-13
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
[0004] In order to overcome the deficiency of low tensile strength of the engine wheel formed by the existing engine wheel forging method, the invention provides a forging method of the engine double alloy wheel
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[0015] The following examples refer to Figure 1-2 .
[0016] This embodiment is the forging method of the Ti-24Al-15Nb-1.5Mo / TC11 double alloy wheel disc of the engine, which is characterized in that it includes the selection of welding materials, welding into discs, preparation process before forging, determination of forging process parameters, isothermal (or nearly Isothermal) forging and tissue observation and mechanical performance testing, the specific steps are as follows:
[0017] Step 1, welding material selection: Ti-24Al-15Nb-1.5Mo alloy and TC11 titanium alloy, Ti-24Al-15Nb-1.5Mo alloy as the edge material, and TC11 titanium alloy as the core material.
[0018] Step 2, welding into discs: annealing the Ti-24Al-15Nb-1.5Mo alloy and TC11 alloy before welding to homogenize the structure; then machining, the Ti-24Al-15Nb-1.5Mo alloy is processed into a ring, and the TC11 alloy is processed into a disc shape. Discs are welded by vacuum electron beam.
[0019] Step ...
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The invention discloses a forging method of an engine double-alloy wheel disc and aims to solve the technical problem that an engine wheel disc formed by an existing engine wheel disc forging method is low in tensile strength. According to the technical scheme, the method includes selecting two kinds of alloys conforming to the working environments of the double-alloy wheel disc, welding to form the disc, selecting the recrystallization initial temperature of the material with high recrystallization initial temperature or the minimum temperature, with deformation not smaller than 20% and without cracking, during conventional forging as the final forging temperature of a heterogeneous alloy blank according to the recrystallization initial temperature and the forgeability of the selected alloys, and isothermally forging the welded double-alloy wheel disc on isothermal forging equipment according to determined forging process parameters. By the method, a heterogeneous alloy fusion welding joint solidification structure is changed into a deformation structure, that is to say, thick columnar crystals are changed into a mixed structure formed by thin isometric crystals or strip phases and isometric phases after deformation, the mixed structure is combined with welding air holes through forging, and tensile strength of an engine wheel disc welding joint is increased.
Description
technical field [0001] The invention relates to a forging method of an engine wheel, in particular to a forging method of an engine double alloy wheel. Background technique [0002] The compressor disk of the engine is subjected to the combined action of mechanical stress and thermal stress caused by temperature difference during service. The stress and heat state of the central part of the disk and the edge of the disk are different, so the performance requirements of each part are also different. In the edge part, due to the friction with the high-speed flow of the airflow, the temperature of the edge is relatively high, but the edge of the plate bears a small centrifugal stress; therefore, the edge of the plate must have good resistance to high temperature oxidation, high temperature creep and resistance properties such as fatigue crack growth. In contrast, the core of the disc works at a relatively low temperature, but bears a large centrifugal stress; therefore, the c...
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IPC IPC(8): B21K3/00
Inventor 姚泽坤秦春宁永权赵张龙涂唯坚赵曼
Owner NORTHWESTERN POLYTECHNICAL UNIV