Separation method of non-metallic inclusions in inconel625 series superalloys

A technology for non-metallic inclusions and high-temperature alloys, applied in the field of separation of non-metallic inclusions in Inconel625 series superalloys, can solve the problem of small content and size of non-metallic inclusions, shedding of the matrix, affecting the observation and analysis of non-metallic inclusions, etc. problem, to avoid severe shedding, and achieve the effect of uniform alloy matrix

Active Publication Date: 2018-07-06
常州市申鑫新材料科技有限公司
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Problems solved by technology

This method has a serious problem of matrix shedding in the electrolysis of nickel-based superalloys; usually the extract after electrolysis is often a mixture of carbides and non-metallic inclusions, carbides account for the vast majority, and the mixed extraction from carbides and non-metallic inclusions The separation of non-metallic inclusions from solids has not been paid enough attention; and the purity of nickel-based superalloys is much higher than that of ordinary steel, resulting in small non-metallic inclusions in content and size. Non-metallic inclusions often serve as the nucleation center of carbides, and some carbides nucleate and grow on the non-metallic inclusions, forming a coating structure, which seriously affects the observation and analysis of non-metallic inclusions after electrolytic collection

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  • Separation method of non-metallic inclusions in inconel625 series superalloys
  • Separation method of non-metallic inclusions in inconel625 series superalloys
  • Separation method of non-metallic inclusions in inconel625 series superalloys

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Embodiment Construction

[0017] The present invention is the separation method of non-metallic inclusions in Inconel625 series superalloy, and its steps are:

[0018] (1) Workpiece preparation: Cut the rod-shaped workpiece at the position where the inclusions of the alloy ingot are enriched by machining; put the cut workpiece in acetone solution and clean it with ultrasonic vibration for about 10 minutes;

[0019] (2) Heat treatment: Use a box-type resistance furnace to perform two-stage solid solution treatment on the cleaned workpiece. The specific heat treatment process is: 1130-1170 °C for 1 hour, heat up to 1200-1210 °C for 1 hour, and water cooling;

[0020] (3) Make a semi-permeable plastic bag: pour a small amount of liquid collodion into a reaction container with a suitable capacity according to the size of the workpiece, turn the container so that a layer of collodion is evenly attached to the inner wall, pour out the excess liquid, and wait for the collodion When dry, carefully tear it off ...

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Abstract

The invention discloses a separation method for nonmetallic inclusions in an Inconel625-series high-temperature alloy, and belongs to the technical field of methods for researches on nonmetallic inclusions in metallic materials. A proper electrolyte is selected to electrolyze a high-temperature alloy test sample; a collected extract mixture is separated by virtue of a chemical method after electrolysis, and carbides are dissolved to completely and nondestructively extract fine oxide inclusions in the Inconel625-series high-temperature alloy; the obtained oxide inclusions are observed to have obvious particle shapes under a scanning electron microscope, and are proven to be Al and Mg containing composite oxide inclusions by energy spectrum analysis.

Description

technical field [0001] The invention relates to a research method for non-metallic inclusions in metal materials, in particular to the quantitative extraction of non-metallic inclusions in Inconel625 series superalloys. Background technique [0002] Inconel 625 series superalloy refers to 625 alloy and its derivative materials (718, 706, etc.). It occupies an extremely important position in the field of high-temperature alloys and is widely used in key components in heavy industries such as aerospace, industrial gas turbines, petrochemicals, ships and ships, and nuclear power equipment. Therefore, such materials are required to have extremely high physical and chemical properties, and trace non-metallic inclusions seriously affect their performance indicators. [0003] At present, the research on non-metallic inclusions is mainly concentrated in iron and steel materials, and the research on non-metallic inclusions in steel is quite mature, while the research on non-metallic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/40
CPCG01N1/4044
Inventor 丁雨田王伟李海峰胡勇贾智郭廷彪刘建军
Owner 常州市申鑫新材料科技有限公司
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