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Forming method for large thin-walled skin-coated ribbed plate titanium castings

A forming method and a technology of skinned ribs, which are applied in the field of titanium alloy casting and forming, can solve the problems of casting scrap, large size, troublesome casting deformation process, etc., achieve good dimensional accuracy, small solidification shrinkage, and avoid slag inclusion and surface cracks the effect of the situation

Active Publication Date: 2016-08-24
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The wall of this type of casting is thin and the size is large. No matter what factors cause the deformation of the casting, it will bring huge troubles to the process of casting deformation correction, and it is very easy to cause the casting to be scrapped.
[0009] Based on the above problems, the conventional titanium alloy casting production process can no longer meet the requirements of this type of casting, so it is urgent to find a new forming method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: A kind of forming method of large-scale thin-walled skin rib titanium casting, the complete casting to be cast is divided into a plurality of skin rib units, each skin rib unit is processed and formed respectively, and then the method of casting is used for each The parts are bonded together to obtain the final large thin-walled skin rib titanium casting.

[0026] Among them, the titanium casting of a single skin rib unit is formed by the following method:

[0027] Step 1: Selection of titanium alloy raw materials, using TC4 titanium alloy as raw material, and adopting ZH-150 vacuum consumable electric arc furnace for secondary melting ingots, the chemical composition of the obtained ingots is: Al 5.5%, V 3.5 %, Fe 0.3%, C 0.08%, N 0.05%, H 0.015%, O 0.2%, other impurities 0.4%, the rest is Ti;

[0028] Step 2: skin forming, use the titanium alloy raw material described in step 1, adopt the production process of hot rolling to make a skin with a size of 2...

Embodiment 2

[0033] Embodiment 2: A kind of forming method of large-scale thin-walled skin rib titanium casting, the complete casting to be cast is divided into a plurality of skin rib units, each skin rib unit is processed respectively, and then the method of casting is used for each part Bonded together, and then get the final large thin-walled skin rib titanium casting.

[0034] Among them, the titanium casting of a single skin rib unit is formed by the following method:

[0035] Step 1: Selection of titanium alloy raw materials, using TC4 titanium alloy as raw material, and adopting ZH-150 vacuum consumable electric arc furnace for secondary melting ingots, the chemical composition of the obtained ingots is: Al6.5%, V 4.5%, Fe 0.3%, C 0.08%, N 0.05%, H 0.015%, O 0.2%, other impurities 0.4%, and the rest is Ti.

[0036] Step 2: skin forming, using the titanium alloy raw material described in step 1, adopting the production process of hot rolling to make a skin with a size of 228*210*2m...

Embodiment 3

[0041]Embodiment 3: A kind of forming method of large-scale thin-walled skin rib titanium casting, the complete casting to be cast is divided into a plurality of skin rib units, each skin rib unit is processed respectively, and then the method of casting is used for each part Bonded together, and then get the final large thin-walled skin rib titanium casting.

[0042] Among them, the titanium casting of a single skin rib unit is formed by the following method:

[0043] Step 1: Selection of titanium alloy raw materials, using TC4 titanium alloy as raw material, and adopting ZH-150 vacuum consumable electric arc furnace for secondary melting ingots, the chemical composition of the obtained ingots is: Al 6%, V 4 %, Fe 0.3%, C 0.08%, N 0.05%, H 0.015%, O 0.2%, other impurities 0.4%, and the rest is Ti.

[0044] Step 2: skin forming, use the titanium alloy raw material described in step 1, adopt the production process of hot rolling to make a skin with a size of 228*210*2mm, and d...

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Abstract

The invention discloses a forming method for large thin-walled skin-coated ribbed plate titanium castings. According to the forming method, several skin-coated ribbed plate units are bonded by means of casting to obtain finished titanium casting products after being processed from titanium alloy raw materials; and processing steps for the skin-coated ribbed plate units are material selection, skin production, graphite die processing, graphite die degassing, and pouring and mould assembly. The forming method disclosed by the invention is novel in process route, and a forming process for large thin-walled skin-coated ribbed plate titanium alloy products is comprehensively controlled in the three aspects of titanium alloy rolled plate skin design, graphite model design and titanium alloy melting pouring; and therefore, the problems of insufficient pouring and deformation of the conventional large thin-walled titanium castings can be avoided, and the conditions of slag inclusion and surface cracks in casting of a conventional method for large thin-walled titanium castings can also be avoided.

Description

technical field [0001] The invention relates to a casting molding method of a titanium alloy, and is especially suitable for a molding method of a large thin-walled skin rib plate titanium casting. Background technique [0002] Large thin-walled titanium castings are used more and more in the aerospace field, but the production of such castings is relatively difficult, and the production bottlenecks mainly include the following two points: [0003] (1) Difficulty in pouring and punching: large thin-walled titanium castings are prone to insufficient pouring during the pouring and punching process, which will directly lead to the scrapping of castings; [0004] (2) Deformation: The factors that affect the deformation of castings during the production process mainly include the following aspects: [0005] ① Solidification shrinkage deformation: the casting will be deformed during the solidification shrinkage process after pouring; [0006] ②Hot isostatic pressing deformation:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/04C22C14/00C22C1/02
CPCB22D19/0081B22D19/04C22C1/02C22C14/00
Inventor 李伟东朱学明郑韫孙宏喆杨红霞刘茵琪
Owner LUOYANG SUNRUI TI PRECISION CASTING
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