Method for preparing K417G alloy by using DZ417G alloy return material

A technology for returning materials and alloys, which is applied in the field of preparing K417G alloy to achieve the effects of good stability, cost saving and waste reduction

Inactive Publication Date: 2012-07-18
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems existing in the utilization of DZ417G alloy at present, the present invention provides a method for preparing K417G alloy by using returned material of DZ417G alloy

Method used

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  • Method for preparing K417G alloy by using DZ417G alloy return material
  • Method for preparing K417G alloy by using DZ417G alloy return material
  • Method for preparing K417G alloy by using DZ417G alloy return material

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Effect test

Embodiment 1

[0033] The process of preparing K417G alloy by using DZ417G alloy return material is as follows.

[0034] (1) DZ417G alloy return material pretreatment

[0035] Sand blasting is carried out on the returned materials generated during the production of DZ417G castings.

[0036] The return material is the pouring system and the waste castings contain ceramic cores and ceramic filter screens. First, the core is removed. The core is removed by a high-pressure core removal kettle, and caustic potash is used to remove the core. According to the mass ratio, caustic potash: water = 7 : 5; the core removal pressure is 0.4MPa, the lye temperature is 170°C, and the core removal time is 13 minutes. After the core removal is completed, put the returned material into hydrochloric acid with a mass concentration of 4% for neutralization. The neutralization time is 13 minutes, and the neutralization is completed. Then perform sand blasting.

[0037] Put the returned material into the sand blo...

Embodiment 2

[0050] The process of preparing K417G alloy by using DZ417G alloy return material is as follows.

[0051] (1) DZ417G alloy return material pretreatment

[0052] Sand blasting is carried out on the returned materials generated during the production of DZ417G castings.

[0053] The return material is the pouring system and the waste castings contain ceramic cores and ceramic filter screens, which need to be removed first. The high-pressure core removal kettle is used for the removal of the core, and the caustic potash is used for the removal of the core. According to the mass ratio, caustic potash: water = 7:3; the core removal pressure is 0.5MPa, the lye temperature is 210°C, and the core removal time is 10 minutes. After the core removal is completed, put the returned material into hydrochloric acid with a mass concentration of 5% for neutralization. Sand blasting is performed after completion. Put the returned material into the sand blowing machine, control the compressed a...

Embodiment 3

[0066] The process of preparing K417G alloy by using DZ417G alloy return material is as follows.

[0067] (1) DZ417G alloy return material pretreatment

[0068] The return material is the pouring system and the waste castings contain ceramic cores and ceramic filter screens, which need to be removed first. The high-pressure core removal kettle is used for the removal of the core, and the caustic potash is used for the removal of the core. According to the mass ratio, caustic potash: water = 1:1; the core removal pressure is 0.3MPa, the lye temperature is 130°C, and the core removal time is 15 minutes. After the core removal is completed, put the returned material into hydrochloric acid with a mass concentration of 3% for neutralization. Sand blasting is performed after completion. Put the returned material into the sand blowing machine, the compressed air pressure is controlled at 0.2MPa, and the corundum sand with a particle size of 1mm is used for sand blasting to blow the ...

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Abstract

The invention relates to a method for preparing a K417G alloy by using a DZ417G alloy return material. The method comprises the following steps of: smelting the DZ417G alloy return material for the first time after preprocessing the return material, mixing the following materials in mass percent: 0.18-0.22 percent of C, 5.1-5.5 percent of Al, 4.4-4.6 percent of Ti, 9.1-9.4 percent of Cr, 9.8-10.5percent of Co, 2.8-3.0 percent of Mo, 0.017-0.022 percent of B, 0.70-0.75 percent of V, 0.06-0.08 percent of Zr and the balance of Ni, smelting the mixture for the second time to prepare the K417G alloy, refining at temperature ranging from 1550 DEG C to 1590 DEG C for 20min to 30min, and then casting after refining. The invention fully utilizes the DZ417G alloy return material, reduces waste of noble metal resources, and ensures that the prepared K417G alloy has the advantages of good plasticity, high intermediate temperature intensity and good stability through twice smelting. The sigma-phase is not dissolved after being aged for a long time at 850 DEG C, and the K417G alloy can be widely applied to engines of various types.

Description

Technical field [0001] The present invention belongs to the field of nickel -based alloy technology, which involves the use of DZ417G alloys to prepare K417G alloys. Background technique [0002] The chemical composition of DZ417G alloy is shown in Table 1, and the chemical composition of the K417G alloy is shown in Table 2. [0003] Table 1 DZ417G alloy chemical composition [0004] [0005] Table 2 K417G alloy chemical composition [0006] [0007] The K417G alloy has the advantages of small density, good plasticity, high medium temperature strength, and good stability. After the long -term effect of 850 ° C, the σ phase is not precipitated.The alloy has a good casting performance and can be cast into a complex hollow blades. It is suitable for gas turbine blades, guide blades, and other high -temperature parts that are used under 950 ° C. It has been widely used in multiple types of engines. [0008] The effective utilization rate of casting high temperature alloys is usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C19/05C22B7/00
CPCY02P10/20
Inventor 王永明王宇飞王铁军屠晓林王延辉
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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