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A preparation process of high-purity gh825 alloy fine-grained plate

A technology of GH825 and alloy plates, which is applied in the direction of improving process efficiency and energy efficiency, can solve the problems of low purity and low yield, and achieve the effects of improving metallurgical quality, reducing production costs, and increasing yield

Active Publication Date: 2020-08-04
陕西宝锐金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of high-purity GH825 alloy fine-grained plate, which solves the problems of low purity and low yield of GH825 alloy plate in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A kind of preparation method of high-purity GH825 alloy fine-grain plate of the present invention, specifically implement according to the following steps:

[0055] Step 1, Ingredients

[0056] Weigh the components of GH825 alloy according to mass percentage: Ni: 42%, Cr: 21%, Mo: 3%, Ti: 0.98%, Cu: 2%, P: 0.01%, C: 0.016%, and the balance is Fe, the sum of the mass percentages of the above components is 100%; among them, the purity of Ni is not less than 99.96%wt (Jinchuan 1#Ni), C uses spectral electrode carbon, Cr: JCr99-A, Ti: MHT-100, Mo : Mo-1;

[0057] Step 2, use a vacuum induction melting furnace (capacity not less than 3 tons) equipped with an electromagnetic stirring device for vacuum induction melting

[0058] Put the Ni, Cr, and Mo weighed in step 1 into the crucible through the barrel, and vacuumize the melting chamber and the alloy ingot mold chamber with a rectangular inner cavity. After Ni, Cr, and Mo are completely melted, add C, Ti, Cu, P, Fe throu...

Embodiment 2

[0072] A kind of preparation method of high-purity GH825 alloy fine-grain plate of the present invention, specifically implement according to the following steps:

[0073] Step 1, Ingredients

[0074] The components of the GH825 alloy were weighed by mass percentage: Ni: 38%, Cr: 19.5%, Mo: 3.5%, Ti: 1.2%, Cu: 1.5%, P: 0.01%, C: 0.015%, and the balance was Fe, the sum of the mass percentages of the above components is 100%; among them, the purity of Ni is not less than 99.96%wt (Jinchuan 1#Ni), C uses spectral electrode carbon, Cr: JCr99-A, Ti: MHT-100, Mo : Mo-1;

[0075] Step 2, use a vacuum induction melting furnace (capacity not less than 3 tons) equipped with an electromagnetic stirring device for vacuum induction melting

[0076]Put the Ni, Cr, and Mo weighed in step 1 into the crucible through the barrel, and vacuumize the melting chamber and the alloy ingot mold chamber with a rectangular inner cavity. , after Ni, Cr, and Mo are completely melted, add C, Ti, Cu, P, ...

Embodiment 3

[0090] A kind of preparation method of high-purity GH825 alloy fine-grain plate of the present invention, specifically implement according to the following steps:

[0091] Step 1, Ingredients

[0092] The components of the GH825 alloy were weighed by mass percentage: Ni: 46%, Cr: 23.5%, Mo: 2.5%, Ti: 0.6%, Cu: 3%, P: 0.01%, C: 0.018%, and the balance was Fe, the sum of the mass percentages of the above components is 100%; among them, the purity of Ni is not less than 99.96%wt (Jinchuan 1#Ni), C uses spectral electrode carbon, Cr: JCr99-A, Ti: MHT-100, Mo : Mo-1;

[0093] Step 2, use a vacuum induction melting furnace (capacity not less than 3 tons) equipped with an electromagnetic stirring device for vacuum induction melting

[0094] Put the Ni, Cr, and Mo weighed in step 1 into the crucible through the barrel, and vacuumize the melting chamber and the alloy ingot mold chamber with a rectangular inner cavity. After Ni, Cr, and Mo are completely melted, add C, Ti, Cu, P, Fe ...

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Abstract

The invention discloses a preparation technology of a high purity GH825 alloy fine-grain plate. The preparation technology is implemented according to the following processes: preparing GH825 alloy raw materials and carrying out vacuum induction smelting to prepare an electrode ingot; carrying out electroslag remelting to prepare an electroslag ingot, removing non-metal material slag on the surface of the electroslag ingot, carrying out uniform heat treatment to obtain a flat cast ingot and carrying out breakdown rolling to obtain a slab; putting the obtained slab into a heat treatment furnacefor heat treatment and hot rolling to obtain a plate; polishing the surface of the plate, removing head parts and tail parts of plates with poor metallurgical quality and shape, carrying out cold rolling, and performing cutting and processing according to the size requirements, thus obtaining the GH825 alloy fine-grain plate. The method disclosed by the invention can inhibit burning loss of Ti elements and improve the alloy yield and alloy strength.

Description

technical field [0001] The invention belongs to the technical field of alloy sheet preparation, and in particular relates to a method for preparing a high-purity GH825 alloy fine-grain sheet. Background technique [0002] GH825 alloy (also known as NS142 in China, corresponding to American alloy Incoloy 825) is an iron-nickel-chromium-based austenitic corrosion-resistant alloy widely used in the petrochemical industry. Alkali corrosion performance, excellent resistance to stress corrosion cracking, pitting corrosion and stress corrosion resistance, and high mechanical properties at temperatures below 550 °C. The application results show that the GH625 alloy is widely used in air heat exchangers in petroleum refining; heating pipes and containers in sulfuric acid pickling plants; acidic ambient gas pipelines; seawater cooling heat exchangers and other products. Research results at home and abroad show that purity has an important impact on the reliability of superalloy parts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C22C1/02C22B9/18C22F1/00
CPCC22B9/18C22C1/023C22C19/055C22C30/02C22F1/10Y02P10/25
Inventor 陈洁杜少华郭秀文
Owner 陕西宝锐金属有限公司
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