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Preparation method of plane thin-wall casting

A thin-walled casting and flat technology, which is applied to casting molding equipment, molds, mold components, etc., can solve the problems of difficult production of flat thin-walled castings, and achieve the effect of easy popularization and application, easy control of quantity and cost saving.

Active Publication Date: 2012-09-19
江苏金研新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing flat thin-walled castings, which solves the problems that flat thin-walled castings are difficult to produce, adopts the investment casting method, and can prepare large-sized ultra-thin thin-walled castings without using molds and ceramic cores. Flat casting

Method used

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  • Preparation method of plane thin-wall casting
  • Preparation method of plane thin-wall casting
  • Preparation method of plane thin-wall casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Choose Al 2 o 3 For the ceramic sheet with a content of 99wt%, according to the wax pattern module assembly method shown in Figure 1, the ceramic sheet-stencil group is assembled into a wax pattern module to make a ceramic mold shell. Use a vacuum induction furnace to remelt the DZ125 master alloy (the alloy composition is shown in Table 1). After the alloy is refined, pour it into the mold shell. The pouring temperature should be 1520 ° C. The alloy melt is still in the mold shell for 5 minutes, and then the mold shell is pulled down at a uniform speed. , the pull-down speed is 6mm / min. After solidification, the cooled mold shell is kept in a muffle furnace at 800°C for 2 hours to relieve stress, and then cooled to room temperature with the furnace before the shell can be cleaned to obtain the required casting.

[0030] The ceramic sheet-stencil group of thin-walled castings with a thickness of 0.2mm and the macroscopic appearance such as figure 2 as shown, figure ...

Embodiment 2

[0032] Choose Al 2 o 3 For ceramic sheets with a content of more than 99wt%, according to the wax pattern module assembly method shown in Figure 1, the wax plate 1 between the ceramic sheet-stencil group and the water cooling plate is replaced with three seed crystals of the required orientation. Formwork for pre-embedded seed crystals. Use a vacuum induction furnace to remelt the SRR99 master alloy (the alloy composition is shown in Table 1). After the alloy is refined, it is poured into the mold shell. The pouring temperature should be 1550 ° C. The alloy melt is still in the mold shell for 5 minutes, and then the mold shell is pulled down at a uniform speed. , the pull-down speed is 6mm / min. After solidification, the cooled mold shell is kept in a muffle furnace at 800°C for 2 hours to relieve stress, and then cooled to room temperature with the furnace before the shell can be cleaned to obtain the required casting.

[0033] The morphology of three-crystal thin-walled ca...

Embodiment 3

[0035] Choose Al 2 o 3 For ceramic sheets with a content of more than 99wt%, according to the wax pattern module assembly method shown in Figure 1, replace the medium-temperature wax block between the ceramic sheet-stencil group and the water cooling plate with a single seed crystal or a crystal selector with the desired orientation , to make a mold shell. Use a vacuum induction furnace to remelt the DD5 master alloy (the alloy composition is shown in Table 1). After the alloy is refined, pour it into the mold shell. The pouring temperature should be 1550 ° C. The alloy melt is still in the mold shell for 5 minutes, and then the mold shell is pulled down at a uniform speed. , the pull-down speed is 6mm / min. After solidification, the cooled mold shell is kept in a muffle furnace at 800°C for 2 hours to relieve stress, and then cooled to room temperature with the furnace before the shell can be cleaned to obtain the required casting.

[0036] The morphology of the 0.5mm thick...

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Abstract

The invention relates to the investment casting technology, in particular to a preparation method of a plane thin-wall casting. The preparation method provided by the invention comprises the steps of: selecting a ceramic wafer as a support carrier of wax paper; first, cutting the Al2O3 ceramic wafer and the wax paper in same dimension and stacking the ceramic wafer and the wax paper alternately, sealing the upper and lower edges of the ceramic wafer by a binder to obtain a ceramic-wax paper group; then welding the ceramic-wax paper group with a middle temperature wax plate alternately as an ensemble and assembling a plurality of such ensembles into a module according to conventional assembling manner of wax mould module; then preparing a ceramic mould shell according to the preparation process of the mould shell; and finally obtaining the plane thin-wall casting by steps of smelting, pouring, distressing and cleaning the shell. Thickness of the thin-wall casting can be controlled precisely manually and thickness of a thin sheet can be controlled precisely to 0.2mm. The preparation method of the plane thin-wall casting provided by the invention solves the engineering problem that the plane thin-wall casting mould is difficult to design and the surface of the plane thin-wall casting is uneven and the plane thin-wall casting is undersized and the like to the disadvantage of volume production.

Description

Technical field: [0001] The invention relates to investment casting technology, in particular to a method for preparing a plane thin-walled casting. Background technique: [0002] It is well known that investment casting is a common technique for preparing superalloy castings. The technology produces castings of various geometries, among which turbine blades for aero-engines are the most delicate. The investment casting process for producing castings with complex shapes is as follows: First, design a mold that is exactly the same shape as the casting, use the mold to press the required wax pattern, and then bond the wax pattern with the gating system to form a wax pattern module. The wax mold module is coated with sand, dried and hardened, dewaxed and baked to become a ceramic mold shell. Finally, the smelted alloy is poured into the ceramic mold, and after the mold is cooled, it is crushed to obtain the required casting. However, in the investment casting process, the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 张小丽周亦胄金涛孙晓峰
Owner 江苏金研新材料科技有限公司
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