Technique for producing small-size complex inner cavity titanium alloy casting by utilizing metal core

A technology of metal cores and process methods, applied in metal material coating process, metal processing equipment, cores, etc., can solve the problems that slurry coating and drying cannot be realized, and achieve high thermal shock resistance and high thermal stability Slight effects of sexual, physical and chemical reactions

A technology of metal cores and process methods, applied in metal material coating process, metal processing equipment, cores, etc., can solve the problems that slurry coating and drying cannot be realized, and achieve high thermal shock resistance and high thermal stability Slight effects of sexual, physical and chemical reactions

CN112676534APending Publication Date: 2021-04-20AEROSPACE HIWING HARBIN TITANIUM IND
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  • Technique for producing small-size complex inner cavity titanium alloy casting by utilizing metal core
  • Technique for producing small-size complex inner cavity titanium alloy casting by utilizing metal core

Examples

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Effect test

Embodiment 1

[0032] Embodiment 1 (see figure 1 with figure 2 ): In the present embodiment, a process for utilizing a metal core to produce a closed impeller with an opening between the loam cake and the lower cover less than 5mm is carried out in the following steps:

[0033] 1. Use iron-based alloy to make the core, and then use vacuum plasma spraying equipment to spray Y on the surface of the core. 2 o 3 Coating, the thickness of the coating is 0.15mm, and after drying at 20°C for 24 hours, a coated core is obtained; the iron-based alloy is Q235 steel;

[0034] Two, the core is placed in the aluminum alloy wax mold, and the wax mold is pressed to obtain the wax mold; the material of the wax mold is aluminum alloy;

[0035] 3. Slurry the surface layer and the back layer of the wax model cleaned on the surface. Both the surface layer slurry and the back layer slurry are prepared from refractory materials and binders. The refractory material of the surface layer slurry is 85%. Y 2 o ...

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Abstract

The invention discloses a technique for producing a small-size complex inner cavity titanium alloy casting by utilizing a metal core, and belongs to the technical field of titanium alloy investment precision casting processes. The technique solves technical problems that in an existing investment precision casting composite water-soluble core technique, when inner cavity size is small to a certain extent, slurry coating and drying cannot be achieved, and an existing technological method for investment precision casting composite ceramic core is not suitable for small-size complex flow channel structures and other products with a high sealing degree. According to the technique, a metal core is adopted to replace an existing water-soluble core and an existing ceramic core, core removal is achieved through a chemical method by means of the property difference between metal core material and titanium alloy, development and production of small-size complex inner cavity products are completed, and the product size precision and the product quality are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy investment precision casting technology, and in particular relates to a process method for producing a titanium alloy casting with a small-sized complex inner cavity by using a metal core. Background technique [0002] In recent years, with the continuous upgrading of aerospace equipment, the titanium alloy structural parts used in it are developing towards complexity and precision, and some products have certain complex inner cavity structures or small-sized complex flow channel structures. This complex structure usually cannot be machined, and must rely on the preset core in the precision casting process to realize the product forming, usually using the process method of investment precision casting composite core. [0003] There are mainly two types of core materials, one is water-soluble core and the other is ceramic core. The technology of investment precision casting composite cerami...

Claims

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Application Information

Patent Timeline
20 Apr 2021
Publication
CN112676534A
IPC
B22C9/04; B22C9/10; B22C9/22; B22C3/00; C23C4/11; C23C4/134; C23C4/137
Inventors
张洋; 闻雅