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Precision investment casting casing-making method suitable for stainless steel casting

A technology of investment precision casting and stainless steel, which is applied in the field of shell making and stainless steel castings in the process of investment precision casting, which can solve the problems of high cost and high price of zircon powder, so as to improve quality, increase production efficiency and improve casting quality. The effect of yield rate and purchase convenience

Active Publication Date: 2013-02-13
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this stage, zircon powder and Shangdian sand are mainly used as formwork materials at home and abroad, but due to the high price of zircon powder, the cost is very high for mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Preparation of binder Mix GRJ-30 silica sol with a pH range of 9 to 11 and distilled water at a ratio of 10:1, and the slurry can be prepared after sufficient stirring.

[0032] 2) Surface layer slurry preparation Pour the prepared binder into the DXPJ fast mixer, add Shangdian powder (280#~300#) while stirring, and stir at high speed for 15 minutes. If there is slurry splashing, the speed can be appropriately reduced. Then stir for at least 45 minutes at a low speed, measure out the fast penetrating agent T (accounting for 0.2% of the weight of the silica sol) and the defoamer (accounting for 0.2% of the weight of the silica sol), and add the same volume of industrial alcohol to dilute , add the surface layer slurry. After the stirring was stopped, the measured specific gravity of the slurry was 2.9, and the viscosity of the slurry was 35.

[0033] 3) The surface layer sanding uses 70 mesh Shangdian sand for the surface layer sanding, the drying time is 10h, self-...

Embodiment 2

[0041] 1) Preparation of binder Mix GRJ-30 silica sol with a pH range of 9 to 11 and purified water at a ratio of 10:1, and the slurry can be prepared only after sufficient stirring.

[0042] 2) Surface layer slurry preparation Pour the prepared binder into the DXPJ fast mixer, add Shangdian powder (280#~300#) while stirring, and stir at high speed for 15 minutes. If there is slurry splashing, the speed can be appropriately reduced. Then stir for at least 45 minutes at a low speed, measure out the fast penetrating agent T (accounting for 0.2% of the weight of the silica sol) and the defoamer (accounting for 0.2% of the weight of the silica sol), and add the same volume of industrial alcohol to dilute , add the surface layer slurry. After the stirring was stopped, the measured specific gravity of the slurry was 2.75, and the viscosity of the slurry was 30.

[0043] 3) The surface layer sanding uses 70-mesh Shangdian sand for the surface layer sanding, the drying time is 9 hou...

Embodiment 3

[0051] 1) Preparation of binder Mix GRJ-30 silica sol with a pH range of 9 to 11 and distilled water at a ratio of 10:1, and the slurry can only be prepared after sufficient stirring.

[0052] 2) Surface layer slurry preparation Pour the prepared binder into the DXPJ fast mixer, add Shangdian powder (280#~300#) while stirring, and stir at high speed for 15 minutes. If there is slurry splashing, the speed can be appropriately reduced. Then stir for at least 45 minutes at a low speed, measure out the fast penetrating agent T (accounting for 0.2% of the weight of the silica sol) and the defoamer (accounting for 0.2% of the weight of the silica sol), and add the same volume of industrial alcohol to dilute , add the surface layer slurry. After the stirring was stopped, the measured specific gravity of the slurry was 2.65, and the viscosity of the slurry was 28.

[0053] 3) The surface layer sanding uses 70 mesh Shangdian sand for surface layer sanding, the drying time is 9 hours,...

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Abstract

The invention discloses a precision investment casting casing-making method suitable for a stainless steel casting. The precision investment casting casing-making method comprises blending of an adhesion agent; preparation of surface layer slurry; surface layer stuccoing; preparation of transition layer slurry; transition layer stuccoing; preparation of reinforcing layer slurry; reinforcing layer stuccoing; preparation of obturating layer slurry; and drying of an obturating layer. Kaoline powder cheap in price is adopted mainly and is convenient to purchase, a preparation process and proportioning are simple, the aim of effectively reducing production cost in aluminum alloy precision investment casting is achieved on the premises that quality of a formwork and the surface of the casting is not reduced, quality of the casting is effectively improved, and production efficiency and the finished product rate of the casting are improved.

Description

technical field [0001] The invention relates to investment casting technology, in particular to a shell-making method in the process of investment precision casting, and is especially suitable for the production method of stainless steel castings with high requirements on dimensional accuracy and surface. Background technique [0002] Aerospace, aviation, navigation, communication and other fields have higher and higher requirements for product technical performance, and many complex structural parts are difficult to obtain by other methods. Casting, as a special method, can achieve this very well. The investment casting method has unique advantages for the production of complex structural parts, especially those with strict requirements on surface quality and dimensional accuracy. Investment casting methods at home and abroad are mainly aimed at the manufacture of castings of some light metal alloys such as magnesium alloys and aluminum alloys, and have achieved great resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C1/18
Inventor 朱鹏超薛祥义常辉狄玮岚周中波张利军
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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