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Non-metallic material and metal material brazing method capable of forming interpenetrating network structure brazing seams

A technology of interpenetrating network structure and non-metallic materials, used in metal processing equipment, welding equipment, manufacturing tools, etc., can solve problems such as large residual stress of joints, reduce residual stress, improve joint strength, and facilitate mass production.

Active Publication Date: 2014-08-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of relatively large residual stress in the joint after welding in the existing brazing method of non-metallic materials and metal materials, and provides a brazing method for non-metallic materials and metal materials that can form interpenetrating network structure brazing seams

Method used

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  • Non-metallic material and metal material brazing method capable of forming interpenetrating network structure brazing seams

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specific Embodiment approach 1

[0020] Embodiment 1: In this embodiment, the brazing method of non-metallic materials and metal materials that can form interpenetrating network structure brazing seams is carried out according to the following steps:

[0021] 1. Grinding: Use 80#~1000# SiC sandpaper to polish the surface of the metal material to obtain a clean metal material; use 1000# SiC sandpaper to polish the surface of the non-metallic material to obtain a clean non-metallic material; The metal material is steel, titanium alloy, superalloy or refractory metal; the non-metal material is ceramic, composite material or graphite;

[0022] 2. Cleaning: ultrasonically treat the metal material with a clean surface obtained in step 1 in acetone for 10-20 minutes at room temperature to obtain the treated metal material; clean the non-metal material with a clean surface obtained in step 1 at room temperature Under the condition of ultrasonic treatment in acetone for 10min-20min, the treated non-metallic material i...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the metal material in step 1 is niobium, vanadium, chromium, titanium or zirconium. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the non-metallic material in step 1 is BN / SiO 2 ceramics. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a brazing method for a non-metallic material and a metal material, in particular to a non-metallic material and metal material brazing method capable of forming interpenetrating network structure brazing seams. The problem that large residual stress exists on a joint welded through the brazing method for the non-metallic material and the metal material is solved. The method comprises the steps that grinding is carried out through abrasive paper; acetone is used for cleaning; the materials are overlapped according to a certain sequence; welding is carried out, and the materials are placed in a vacuum brazing furnace to be welded. The brazing method is used for brazing of the non-metallic material and the metal material.

Description

technical field [0001] The invention relates to a brazing method for non-metallic materials and metallic materials. Background technique [0002] The difficulty in connecting non-metallic materials with metallic materials lies in the large differences in their physical and chemical properties. In particular, the thermal expansion coefficient and modulus of elasticity of non-metallic materials are often quite different from those of metal materials, and the joints are prone to residual stress during cooling after welding, and stress concentration is formed on the side of the non-metallic material. In addition, non-metallic materials have poor chemical compatibility with metallic materials, making it difficult to form a reliable chemical-metallurgical interface. [0003] In order to alleviate the residual stress of the joint, the connection between non-metallic materials and metal materials is generally achieved by adding an intermediate layer. The Chinese patent with applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/20B23K1/008
CPCB23K1/008B23K1/19B23K1/20B23K1/206C04B37/026
Inventor 张丽霞孟德强石俊秒杨景红亓钧雷冯吉才
Owner HARBIN INST OF TECH
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