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Preparation method for TiN/Ti composite permeable layer on surface of beryllium-copper alloy

A beryllium-copper alloy and composite infiltration technology, which is applied in metal material coating process, coating, solid-state diffusion coating and other directions, can solve the problems of insignificant improvement of wear resistance and limited increase in hardness of beryllium-copper alloy.

Active Publication Date: 2016-03-09
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the composition and structure of QBe1.9 alloy, the hardness of beryllium copper alloy after heat treatment is limited, and the improvement effect on wear resistance is not obvious.

Method used

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  • Preparation method for TiN/Ti composite permeable layer on surface of beryllium-copper alloy
  • Preparation method for TiN/Ti composite permeable layer on surface of beryllium-copper alloy
  • Preparation method for TiN/Ti composite permeable layer on surface of beryllium-copper alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of the TiN / Ti compound infiltration layer on the beryllium-copper alloy surface provided by the present embodiment comprises the following steps:

[0035] (1) Pretreatment of the beryllium-copper alloy workpiece: the surface of the beryllium-copper alloy workpiece is polished with SiC water washing sandpaper → diamond powder polishing → acetone cleaning, and then dried for later use;

[0036] (2) Place the pretreated beryllium-copper alloy workpiece 4 on the cathode backing plate 5 in the plasma metallization furnace, and add an auxiliary cathode 2 around it, and process holes on the auxiliary cathode to facilitate the passage of working gas; The pure titanium plate 3 is placed above the beryllium-copper alloy workpiece through the target cathode frame 10, and the pure titanium plate 3 is located in the auxiliary cathode, with a distance of 18mm from the beryllium-copper alloy workpiece;

[0037] The target material is pure titanium plate with a p...

Embodiment 2

[0045] The preparation method of the TiN / Ti compound infiltration layer on the beryllium-copper alloy surface provided by the present embodiment comprises the following steps:

[0046] (1) Pretreatment of the beryllium-copper alloy workpiece: the surface of the beryllium-copper alloy workpiece is polished with SiC water washing sandpaper → diamond powder polishing → acetone cleaning, and then dried for later use;

[0047] (2) Place the pretreated beryllium-copper alloy workpiece 4 on the cathode backing plate 5 in the plasma metallization furnace, and add an auxiliary cathode 2 around it, and process holes on the auxiliary cathode to facilitate the passage of working gas; The pure titanium plate 3 is placed above the beryllium copper alloy workpiece through the target cathode frame 10, the pure titanium plate 3 is located in the auxiliary cathode, and the distance between the beryllium copper alloy workpiece and the beryllium copper alloy workpiece is 25mm;

[0048] (3) The be...

Embodiment 3

[0055] The preparation method of the TiN / Ti compound infiltration layer on the beryllium-copper alloy surface provided by the present embodiment comprises the following steps:

[0056] (1) Pretreatment of the beryllium-copper alloy workpiece: the surface of the beryllium-copper alloy workpiece is polished with SiC water washing sandpaper → diamond powder polishing → acetone cleaning, and then dried for later use;

[0057] (2) Place the pretreated beryllium-copper alloy workpiece 4 on the cathode backing plate 5 in the plasma metallization furnace, and add an auxiliary cathode 2 around it, and process holes on the auxiliary cathode to facilitate the passage of working gas; The pure titanium plate 3 is placed above the beryllium-copper alloy workpiece through the target cathode frame 10, and the pure titanium plate 3 is located in the auxiliary cathode, with a distance of 15mm from the beryllium-copper alloy workpiece;

[0058] (3) The beryllium copper alloy workpiece is connect...

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Abstract

The invention discloses a preparation method for a TiN / Ti composite permeable layer on the surface of beryllium-copper alloy and belongs to the technical field of metallic material surface modification. The preparation method comprises the steps that (1) a beryllium-copper alloy workpiece is pretreated; (2) a plasma titanizing process is conducted in a plasma metal cementation furnace; and (3) the titanized beryllium-copper alloy workpiece is placed in a conventional ion nitriding furnace to be subjected to nitridation, and finally the TiN / Ti composite permeable layer of the beryllium-copper alloy is obtained. According to the preparation method, the plasma surface alloying technique and the ion nitriding technique are combined, the TiN / Ti composite permeable layer is formed on the surface of the soft beryllium-copper alloy, and the obtained composite permeable layer is good in abrasion resistance.

Description

technical field [0001] The invention relates to a method for preparing a TiN / Ti composite infiltrated layer on the surface of a beryllium copper alloy, and belongs to the technical field of surface modification of metal materials. Background technique [0002] Beryllium-copper alloy is widely used in various fields such as electronics, aerospace, petrochemical and other fields due to its good electrical conductivity, thermal conductivity, and high elastic limit. It has become an indispensable important industrial material in the construction of the national economy. Due to the low hardness and poor wear resistance of the QBe1.9 alloy, beryllium copper alloy parts used in frictional environments, such as gears, test probes, shrapnel, etc., are often severely worn due to their low hardness. Heat treatment is currently the main method to improve the mechanical properties of QBe1.9 alloy. However, limited by the composition and structure of QBe1.9 alloy, the increase in hardnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/48C23C14/16C23C8/36
CPCC23C8/36C23C14/165C23C14/48
Inventor 刘小萍于盛旺林乃明王振霞刘琳
Owner TAIYUAN UNIV OF TECH
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