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A graphite mold for improving filling performance of titanium alloy casting and preparation method thereof

A titanium alloy and graphite technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., to achieve the effect of no inclusions, no reaction, and no cold insulation defects

Active Publication Date: 2020-09-15
BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention proposes a graphite mold for improving the filling performance of titanium alloy casting and its preparation method to solve the technical problem of how to improve the filling performance of titanium alloy casting

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  • A graphite mold for improving filling performance of titanium alloy casting and preparation method thereof

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Embodiment Construction

[0029] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] This embodiment proposes a casting method that improves the filling performance of titanium alloy graphite casting mold casting, and the preparation method includes the following steps:

[0031] S1. Preparation of graphite mold test piece: The graphite mold test piece is prepared by machine-added graphite casting method. The size of the test piece is 80mm×800mm×2.5mm, 80mm×800mm×3.5mm, 80mm×800mm×4.5mm, 80mm× 800mm×5mm (such as figure 1 shown), vacuum degasses the prepared graphite casting test piece, the vacuum degree during the degassing process is ≤2.0Pa, the degassing temperature is 900±20°C, the holding time is ≥2h, and the furnace can be cooled to 500°C. Stop the vacuum pump, and the furnace can be release...

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Abstract

The invention belongs to the technical field of titanium alloy casting, and particularly relates to a graphite casting mold for improving the casting mold-filling property of a titanium alloy and a preparation method thereof. The preparation method comprises the steps of graphite casting mold test piece preparing, coating slurry preparing, coating slurry coating and casting mold baking. The preparation method obtains a graphite casting mold suitable for titanium alloy casting by the method that portions of a graphite casting mold test piece is coated with the coating slurry having a specific composition and ratio. The graphite casting mold can significantly improve the mold-filling performance of the titanium alloy graphite casting mold casting, realize the perfect mold-filling of the testpiece with 2.5 mm wall thickness, and improve the mold-filling capacity by 50%. The coating slurry has good stability, low cost and good inertia. The coating has high bonding strength with the casting mold, is not prone to falling off, and the surface quality is good. The coating and the titanium alloy are not prone to reacting with each other, and the surface has no cold shut defects, and the inside of the casting can be controlled without inclusions.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy casting, and in particular relates to a graphite mold for improving the filling performance of titanium alloy casting and a preparation method thereof. Background technique [0002] Titanium alloy has excellent properties such as low density, high specific strength, good corrosion resistance, small linear expansion coefficient, excellent high-temperature and low-temperature mechanical properties, and good biocompatibility. It is not only a high-quality structural material, but also a new type of functional material and an important biological Implant materials are widely used in the fields of aerospace, shipbuilding, chemical industry, metallurgy, automobile, sports and biomedicine. The titanium alloy machine plus graphite casting process is widely adopted by most domestic foundries because of its high dimensional accuracy, good refractoriness, high mold strength and short production cycle....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00B22C9/02B22C9/22
CPCB22C3/00B22C9/02B22C9/22
Inventor 岳春华汪海波
Owner BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP