A kind of precision casting method of complex cavity structure titanium alloy casting

A technology of precision casting and titanium alloys, which is applied in casting molding equipment, cores, molds, etc., can solve the problems of inability to realize precision molding of complex cavity overcurrent parts, reduce cold insulation and flow mark defects, and ensure size The effect of high precision and dimensional accuracy

Active Publication Date: 2022-01-21
SHENYANG RES INST OF FOUNDRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a titanium alloy with high dimensional accuracy control, high internal quality, high surface quality, high performance, short construction period and low cost in view of the technical deficiency that the existing process method cannot realize the precision molding of the complicated cavity flow parts. Alloy precision casting method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material composition of ZTC4ELI consumable electrode is shown in Table 1:

[0030] Table 1

[0031] element Ti Al V Fe C N H O content margin 6.30 4.10 0.08 0.03 0.0023 0.0039 0.090

[0032] (1) Machining the graphite casting skin: use the CNC machining center to process the graphite casting skin according to the process drawings.

[0033] (2) Machining the metal core: use the CNC machining center to process the metal core according to the process drawings.

[0034] (3) Preparation of refractory coating raw materials for plasma spraying: take 6% yttrium oxide powder with a particle size of 45 μm to 75 μm, 9% calcium oxide powder with a particle size of 45 μm to 75 μm, and 85% zirconia powder with a particle size of 45 μm to 75 μm, mix them uniformly, and ball mill for 3 hours; The obtained powder is smelted at a high temperature by high-temperature arc smelting at a melting temperature of 1800°C to 3000°C, and the obtained ...

Embodiment 2

[0041] The raw material composition of ZTC4ELI consumable electrode is shown in Table 2:

[0042] Table 2

[0043] element Ti Al V Fe C N H O content margin 6.38 4.12 0.08 0.02 0.0020 0.0035 0.080

[0044] (1) Machining the graphite casting skin: use the CNC machining center to process the graphite casting skin according to the process drawings.

[0045] (2) Machining the metal core: use the CNC machining center to process the metal core according to the process drawings.

[0046] (3) Preparation of refractory coating raw materials for plasma spraying: Take 8% yttrium oxide powder with a particle size of 45 μm to 75 μm, 2% calcium oxide powder with a particle size of 45 μm to 75 μm, and 90% zirconia powder with a particle size of 45 μm to 75 μm, mix them uniformly, and ball mill for 3.5 hours; The obtained powder is smelted at a high temperature by high-temperature arc smelting at a melting temperature of 1800°C to 3000°C, and the obtaine...

Embodiment 3

[0053] The raw material composition of ZTC4ELI consumable electrode is shown in Table 3:

[0054] table 3

[0055] element Ti Al V Fe C N H O content margin 6.35 4.12 0.03 0.01 0.0020 0.0030 0.080

[0056] (1) Machining the graphite casting skin: use the CNC machining center to process the graphite casting skin according to the process drawings.

[0057] (2) Machining the metal core: use the CNC machining center to process the metal core according to the process drawings.

[0058] (3) Preparation of refractory coating raw materials for plasma spraying: take 8% yttrium oxide powder with a particle size of 45 μm to 75 μm, 3% calcium oxide powder with a particle size of 45 μm to 75 μm, and 89% zirconia powder with a particle size of 45 μm to 75 μm, mix them uniformly, and ball mill for 4 hours; The obtained powder is smelted at a high temperature by high-temperature arc smelting at a melting temperature of 1800°C to 3000°C, and the obtained ...

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Abstract

The invention discloses a precision casting method for titanium alloy castings with a complex cavity structure, which mainly adopts numerically controlled machining of graphite molds, numerically controlled machining of low-carbon steel metal cores, plasma spraying of high chemical stability coatings on the surface, vacuum automatic The casting process combined with the vacuum centrifugal casting of the consumable electrode arc solidification shell smelting furnace is a new precision casting process for the precision molding of complex cavity titanium alloy flow parts. By utilizing the good thermal insulation performance and surface coating of the metal core, the cold shut and flow mark defects on the surface of the mold can be reduced, and the dimensional accuracy of the metal core is high, which can effectively ensure the dimensional accuracy of the complex cavity of the casting, providing a A titanium alloy precision casting method with high dimensional accuracy control, high internal quality, high surface quality, high performance, short construction period and low cost.

Description

technical field [0001] The invention belongs to the field of casting technology, and relates to a precision casting method for titanium alloy castings with a complex cavity structure, specifically a precision casting method that combines graphite molds, metal cores, and vacuum self-consumable electrode arc solidification and centrifugal casting technology. Cast molding technology. Background technique [0002] At present, titanium alloy castings mainly adopt two casting methods: investment precision casting process and machining graphite casting process. Among them, the investment precision casting process is suitable for the casting of castings with high dimensional accuracy, high surface quality requirements and large batches. The graphite casting process is suitable for the production of castings with high mechanical properties, high pressure bearing, small batch, and relatively simple casting structure. [0003] In view of the complex cavity structure of the core flow-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/02B22C9/10B22C9/22B22C3/00B22D13/00B22D29/00C22C14/00C22C1/03
CPCB22C9/02B22C9/10B22C9/22B22C3/00B22D13/00B22D29/002C22C14/00C22C1/03B22D29/00
Inventor 娄延春赵军史昆刘时兵任亚飞杨海涛王彦鹏
Owner SHENYANG RES INST OF FOUNDRY
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