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A method of manufacturing an insulation wall adjusting a temperature field for directional solidification casting

A technology for adjusting temperature and directional solidification, which is applied in the field of investment casting and can solve problems such as grain size out of tolerance.

Inactive Publication Date: 2018-03-02
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to overcome the above-mentioned deficiencies, to provide a method for manufacturing a thermal insulation wall for directional solidification casting that adjusts the temperature field, to compensate and control the temperature field during the directional casting and solidification process of the thermal insulation wall with a large temperature field adjustment, and to improve the blade column crystal. Single crystal growth conditions can solve the problem of excessive grain size caused by uneven temperature field, and the method is simple and easy to operate, and can solve the problem of slurry accumulation in the shell making process

Method used

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  • A method of manufacturing an insulation wall adjusting a temperature field for directional solidification casting
  • A method of manufacturing an insulation wall adjusting a temperature field for directional solidification casting
  • A method of manufacturing an insulation wall adjusting a temperature field for directional solidification casting

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Effect test

Embodiment 1

[0019] Example 1, the working blade of a high-pressure turbine of a certain machine:

[0020] 1) According to the size of the crystallization chassis Φ400mm, the number of high-pressure turbine blades per module is 15 pieces, and the size design of the corresponding fence strip insulation wall, the outer diameter of the insulation wall is ΦD=150mm, and the inner diameter of the insulation wall is Φd =140mm, the height of the insulation wall is H=110mm, the length of the fence strip is h=100mm, the width of the fence strip is W=21.4mm, and the gap between the fence strips is T=10mm;

[0021] 2) Make the insulation wall wax mold pressing mold according to the design drawing of the fence bar insulation wall;

[0022] 3) Formulate the pressing parameters of the fence strip insulation wall, and carry out wax mold pressing;

[0023] 4) According to the combination diagram of high pressure turbine working blade module ( image 3 ) for module combination;

[0024] 5) Carry out the ...

Embodiment 2

[0026] 1) According to the crystallization chassis size of the module is Φ400mm, the number of high-pressure turbine guide vanes for each module is 13 pieces, and the wax mold of the thermal insulation wall is designed in accordance with the size, the outer diameter of the thermal insulation wall is ΦD=140mm, The inner diameter of the insulation wall is Φd=130mm, the height of the insulation wall is H=90mm, the length of the fence strip is h=80mm, the width of the fence strip is W=22mm, and the gap between the fence strips is T=12mm;

[0027] 2) Make a wax mold according to the design drawing of the fence bar insulation wall;

[0028] 3) Formulate the pressing parameters of the fence strip insulation wall, and carry out wax mold pressing;

[0029] 4) According to the combination diagram of a certain machine's high-pressure turbine guide vane module ( image 3 ) for module combination;

[0030] 5) Carry out the production process of directional column crystal single crystal b...

Embodiment 3

[0031] see figure 1 with figure 2 , embodiment 3, a certain machine high-pressure turbine working blade:

[0032] 1) According to the crystallization chassis size of the module is Φ400mm, the number of high-pressure turbine blades per module is 20 pieces, and the wax mold of the insulation wall is designed in accordance with the size, the outer diameter of the insulation wall is ΦD=170mm, and the insulation wall The inner diameter of the insulation wall is Φd=155mm, the height of the insulation wall is H=120mm, the length of the fence strip is h=110mm, the width of the fence strip is W=14mm, and the gap between the fence strips is T=10mm;

[0033] 2) Make a wax mold according to the design drawing of the fence bar insulation wall;

[0034] 3) Formulate the pressing parameters of the fence strip insulation wall, and carry out wax mold pressing;

[0035] 4) According to the combination diagram of high pressure turbine working blade module ( image 3 ) for module combination...

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Abstract

A method of manufacturing an insulation wall adjusting a temperature field for directional solidification casting is disclosed. A fence-bar-containing insulation wall wax mould playing roles of thermal insulation and material discharging is disposed additionally between a casting wax mould and a central casting pipe during wax mould module assembling. After compression, composition, shell manufacturing, dewaxing, and other processes, the fence-bar-containing insulation wall separates a zone where a casting close to a heater is from a zone where the central casting pipe far from the heater is,and therefore a relatively uniform temperature field is maintained in the heater in which the module is disposed. Fence bars can overcome a problem that mould shell is not thoroughly dried and is lowered in strength due to material pulp accumulation in a shell manufacturing process.

Description

technical field [0001] The invention belongs to the field of investment precision casting, and in particular relates to a method for manufacturing a thermal insulation wall for directional solidification casting to adjust a temperature field. Background technique [0002] The common methods of directional solidification columnar crystal and single crystal casting include exothermic casting method, power reduction method, rapid solidification method and liquid metal cooling method. Among them, the rapid solidification method is currently the most commonly used engineering production method. The crystallizer specifications used in China are usually Φ200mm, Φ250mm, Φ300mm, the equipment utilization rate is not high, and the cost of mass production is high. Therefore, it is necessary to continuously improve the process yield, equipment utilization rate and production capacity of this type of blade, and reduce its production cost. . When using a large crystal chassis (diameter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/52C30B11/00B22C9/04B22C7/02B22D27/04
CPCC30B29/52B22C7/02B22C9/04B22D27/045C30B11/00
Inventor 董茵段朋国梁晓锋常涛岐陈波王斌雍坤轩曹井勇
Owner AECC AVIATION POWER CO LTD