Application process for brazing ZrO2 and TC4 by using NiCrWB powder brazing material

Abstract

The invention provides an application process for brazing ZrO2 and TC4 by using a NiCrWB powder brazing material, and belongs to the field of nickel-based brazing materials. The application process comprises the following steps that (1) the raw materials are smelted into an alloy ingot by utilizing a vacuum arc furnace, wherein the raw materials comprise Cr, W, B and Ni; (2) the alloy ingot is atomized in an atomization chamber, after the atomization is completed, argon is blown into the atomization chamber to reach the atmospheric pressure, and the NiCrWB powder brazing material obtained after gas atomization is collected; (3) the NiCrWB powder brazing material is sieved according to the size of the particle size; and (4) the ZrO2 and the TC4 are brazed by adopting the NiCrWB nickel-basedpowder brazing material. The nickel-based powder brazing material prepared by using the process is high in application performance, it is ensured that a welding joint between the ZrO2 and the TC4 hasno obvious cracks, and high connecting strength is achieved.

Description

technical field [0001] The invention belongs to the field of nickel-based brazing materials, and relates to a brazing process, in particular to a method of brazing ZrO by using NiCrWB powder brazing materials. 2 Applied process with TC4. Background technique [0002] Nickel-based brazing filler metal is a kind of high-temperature brazing filler metal alloy with nickel or nickel-chromium solution as the matrix, adding an appropriate amount of alloying elements to form a complex phase structure. Nickel-based solder has a wide range of applications, it can be used not only at high temperature, but also at room temperature and extremely low temperature. After retrieval, such as the Chinese patent literature discloses a nickel-based high-temperature solder and its preparation method [Patent No.: ZL201010218332.9; authorized announcement number: CN101890591B]. This high-temperature solder and its preparation method involve nickel-based solder and its The preparation method solve...

AI Technical Summary

Problems solved by technology

After retrieval, such as the Chinese patent literature discloses a nickel-based high-temperature solder and its preparation method [Patent No.: ZL201010218332.9; authorized announcement number: CN101890591B]. This high-temperature solder and its preparation method involve nickel-based solder and its The preparation method solves the problem that the violent reaction between the existing nickel-based solder and the ceramic matrix of the C / SiC composite material leads to poor mechanical properties of the brazed joint between the C / SiC composite material and the nickel-based super high temperature alloy. The solder is made of Si powder , TiH2 powder and Ni powder, the preparation method: add acetone to the mixed powder of Si powder, TiH2 powder and Ni powder to obtain a suspension; dry the suspension after ultrasonic treatment, and then grind to obtain the brazing filler metal

[0003] However, the nickel-based high-temperature solder obtained by this preparation method is subjected to ZrO 2 After brazing with TC4, there is still a large residual stress in the brazing seam, and the shearing effect is not optimal

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