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An air consuming agent used in heat treatment of metal materials

A technology for metal materials and consumables, applied in the field of air consumables, can solve the problems of metal material performance degradation, lattice defects, difficulty in maintaining low oxygen and low air content, etc., to achieve the effect of ensuring stability

Active Publication Date: 2020-10-09
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the gas conveying device used is usually a vacuum system combined with a rotary vane pump, a Roots pump and a diffusion pump, although this commonly used vacuum system can reduce the ambient pressure of metal materials to 10 -3 Pa, but since the connection between the heat treatment equipment and the vacuum system is usually sealed with a rubber ring once, it is difficult to block the diffusion of air into the equipment under the pressure difference between the high external atmospheric pressure and the vacuum state in the equipment, making it difficult for metal materials to pass through the heat treatment process. Keep the state of low oxygen and low air content. During the heat treatment process of metal materials, it will react with a small amount of air, resulting in corresponding lattice defects in the metal heat treatment process, resulting in a decrease in the performance of metal materials.

Method used

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  • An air consuming agent used in heat treatment of metal materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 An air depleting agent used in the heat treatment of metal materials

[0028] With metal La powder as induction material, metal Mg powder as reaction material, and metal Ni powder as catalyst, according to the weight ratio of induction material: reaction material: catalyst = 1:1.5:0.05, mix uniformly under the protection of argon atmosphere, and Pressed into a disc with a diameter of 10 mm under a pressure of 10 MPa. The disc was placed on top of a closed container with an inner volume of 1 L.

[0029] The container was heated from room temperature to 200°C at a heating rate of 10°C / min and then kept at 200°C for 20 minutes, then raised to 550°C and held at 20 minutes.

[0030] Through dynamic monitoring of the internal pressure of the airtight container, when the temperature rises to 100°C, the internal pressure of the container begins to drop. During the process of keeping at 200°C for 20 minutes, the internal pressure drops to 300Pa, and as the temperature...

Embodiment 2-6

[0031] Embodiment 2-6 Air depletion agent used in heat treatment of metal materials

[0032] Examples 2-6 are respectively an air consuming agent used in the heat treatment of metal materials. The difference from Example 1 is that the components and proportions of the air consuming agent are different. See the table below for details.

[0033]

[0034] The air consuming agent provided in Examples 2-6 can quickly and completely consume metal materials and heat-treat the active gas in the closed container. After the treatment, the pressure in the closed container can quickly reach 2.8-3.3Pa.

Embodiment 7

[0035] Embodiment 7 Comparative example

[0036] This example is the air consuming agent used in the heat treatment of metal materials with different components. The tableting pressure of the air consuming agent is the same as that of Example 1, and the method of use is also the same as that of Example 1. The only difference is: air The formulations of consumables are different, and the specific formulations are as follows.

[0037] Group A, the induction material is La powder, the reaction material is Mg, and the catalyst is Mn;

[0038] Group B, the induction material is La powder, the reaction material B is the catalyst Cu;

[0039] Group C, the induction material is La powder, and the reaction material is Mg;

[0040] Group D, the reaction material is Mg, and the catalyst is Ni;

[0041] Group E, the induction material is La powder, and the catalyst is Ni;

[0042] In group F, the induction material is La powder, the reaction material is Co, and the catalyst is Mn.

[0...

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Abstract

The invention discloses an air depleting agent for heat treatment of a metal material. The air depleting agent is composed of an inducing material, a reaction material and a catalyst through complex formulation, and the inducing material is one or more of La, Ce, Pr, Nd, and Sm powder; the reaction material is one or more of Mg, Al, and Ca powder, and the catalyst is composed of Ni or Fe powder. The ratio of the air depleting agent is reasonable, active gas in the closed environment is subjected to depleting under high temperature in a short time through catalysis, and no secondary decomposition is generated, the metal material can be kept in a low oxygen state during the heat treatment process, and the dense structure and good performance can be obtained. The air depleting agent is suitable for removing air in the environment of a closed heating device when the rare earth metal functional material is subjected to hot working.

Description

technical field [0001] The invention belongs to the field of heat treatment of metal materials, and relates to an air consumption agent used in the heat treatment of metal materials. Background technique [0002] In the preparation process of metal materials, heat treatment is a key process step to control the composition and microstructure of materials. In recent years, due to the rapid development of the metal functional materials industry, higher and higher requirements have been put forward for the microstructure and composition of metal functional materials. The microstructure of metal functional materials is closely related to its heat treatment environment and heat treatment process. [0003] In the heat treatment process of metal materials, high vacuum is the key factor to ensure that the metal materials do not undergo chemical transformation during the heat treatment process, because this step usually requires a higher temperature (400 ° C ~ 1500 ° C), in this tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81C21D1/74B01D53/86
CPCB01D53/81B01D53/86C21D1/74
Inventor 可丹丹赵鑫胡锋辛国祥蔡颖
Owner INNER MONGOLIA UNIV OF SCI & TECH