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High-temperature alloy slag inclusion filter screen and application

A high-temperature alloy and filter technology, which is applied in the fields of precision casting and material preparation, can solve problems such as slag inclusion, and achieve the effects of improving quality and performance, maximum practicability and controllability

Inactive Publication Date: 2021-03-23
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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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 high-temperature alloy slag inclusion filter and its application, which can solve the problem of slag inclusion in the high-temperature pouring process, and is suitable for the casting process of all metal materials, especially for the ultra-high temperature pouring process

Method used

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  • High-temperature alloy slag inclusion filter screen and application

Examples

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Effect test

Embodiment 1

[0025] In this embodiment, the grade of the superalloy is K465, and the preparation process of the superalloy slag filter screen is as follows:

[0026] Select the raw material of the filter screen as corundum powder, silica powder, carbon powder and silica sol, etc., wherein: corundum powder content 85%, silica powder 2%, carbon powder 2%, silica sol 11% (mass percentage); In the powder, the corundum powder with a particle size of 20-80 mesh accounts for 40 wt% of the total corundum powder, and the rest is corundum powder with a particle size of 200-1000 mesh; the particle size of the silica powder is 320 mesh, and the particle size of the carbon powder is 320 mesh.

[0027] Mix corundum powder of two particle sizes evenly; add carbon powder, mix evenly; add silica sol to mix evenly. Under the conditions of room temperature and pressure 200MPa, the filter screen with high temperature strength of 80MPa is made through the steps of cold pressing, vacuum heat sintering strengthe...

Embodiment 2

[0032] In this embodiment, the grade of the superalloy is K418, and the preparation process of the superalloy slag filter screen is as follows:

[0033] Select filter screen raw material to be corundum powder, silica powder, carbon powder and silica sol etc., wherein, corundum powder content 80%, silica powder 3%, carbon powder 5%, silica sol 12% (mass percentage); Corundum Among the powders, the corundum powder with a particle size of 20-80 mesh accounts for 50 wt% of the total corundum powder, and the rest is corundum powder with a particle size of 200-1000 mesh; the particle size of the silica powder is 320 mesh, and the particle size of the tungsten powder is 320 mesh.

[0034] Mix corundum powder of two particle sizes evenly; add carbon powder, mix evenly; add silica sol to mix evenly. Under the condition of room temperature and pressure of 600MPa, the filter screen with high temperature strength of 60MPa is made through the steps of cold pressing, vacuum thermal sinterin...

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Abstract

The invention relates to the field of precision casting and material preparation, in particular to a high-temperature alloy slag inclusion filter screen and application. Firstly, corundum powder, silicon dioxide, carbon powder, silica sol and the like are selected as raw materials of the filter screen, and the corundum powder comprises corundum powder with the granularity of 20-80 meshes and corundum powder with the granularity of 200-1000 meshes. Then, corundum powder with two particle sizes is uniformly mixed; carbon powder is added and uniformly mixed; and silica sol is added and uniformlyblended. A filter screen with the high-temperature strength of 30-100 MPa is manufactured through the steps of cold static pressure forming, vacuum thermal sintering strengthening, polishing cleaningand the like, and the filter screen is placed in a pouring system. Finally, the alloy liquid is puored under a casting process at the pouring temperature of 1350-1550 DEG C for 3-60 seconds, cooling is carried out, components O, N and S are detected, and the effectiveness of the filter screen is verified. The method is suitable for the casting process of all metal materials, and is particularly suitable for the pouring process of high temperature.

Description

Technical field: [0001] The invention relates to the field of precision casting and material preparation, in particular to a superalloy slag inclusion filter and its application Background technique: [0002] Slag inclusion is one of the main defects in casting parts. Due to slag inclusion, the qualified rate of castings is severely reduced in a large area. It is one of the main problems in the casting process of some precision castings. Ceramic spalling, invasive alloy liquid, forming slag inclusions. The removal of slag inclusions has become the primary problem of secondary remelting casting products, especially during ultra-high temperature casting, the probability of slag inclusions in castings increases. Invention content: [0003] The purpose of the present invention is to provide a high-temperature alloy slag inclusion filter and its application, which can solve the problem of slag inclusion in the high-temperature pouring process, and is suitable for casting proce...

Claims

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Application Information

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IPC IPC(8): C04B35/101C04B35/622C04B38/00B22D43/00
CPCB22D43/004C04B35/101C04B35/622C04B38/00C04B2235/3418C04B2235/422C04B2235/5427C04B2235/5436C04B2235/96
Inventor 杨金侠梁静静李雪徐福涛王志辉孟杰周亦胄孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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