A quenching solder for connecting cemented carbide and steel and its preparation method and connection method

A technology of cemented carbide and connecting materials, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of poor wettability of matrix materials, cracking of cemented carbide, etc., and achieve small thermal stress, The effect of narrow melting range and strong diffusion ability

Inactive Publication Date: 2015-07-29
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, it is only about half of the metal material. When cemented carbide is welded with such materials, a large thermal stress will be generated in the joint. If it exceeds the tensile strength of cemented carbide, it will cause cemented carbide to crack. Due to the particularity of the cemented carbide material, the wettability of the solder to the base material is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Commercially available commodity YG6 and 45 steel were joined by vacuum brazing with quenched solder.

[0027] The composition and content (by mass percentage) of the quenched solder are: Ag: 28%; Zn: 20%; Ni: 1%; Mn: 9.5%; Co: 6.5%; Sn: 1%; the rest is Cu.

[0028] The preparation method of this quenching solder comprises the following steps:

[0029] (1) The raw materials of the above ratio are prepared into the master alloy of the quenched solder by means of electric arc melting. After the master alloy is pulverized, it is put into the quartz glass tube of the HVDS-II high-vacuum single-roller strip machine. The quartz glass tube The nozzle is rectangular, its length is a=8mm, and its width is b=0.8mm;

[0030] (2) Clamp the quartz glass tube into the induction heating ring of the stripping machine, and adjust the distance from the nozzle to the surface of the copper roller to bn=1mm to ensure that the liquid sprayed on the copper roller is a flat flow and form a st...

Embodiment 2

[0040] Commercially available YG6C and 40Cr were connected by vacuum brazing with quenched solder.

[0041] The composition and content (by mass percentage) of the quenched solder are: Ag: 33%; Zn: 18%; Ni: 4%; Mn: 5%; Co: 3%; Sn: 1%; the rest is Cu.

[0042] The preparation method of this quenching solder comprises the following steps:

[0043] (1) The raw materials of the above ratio are prepared into the master alloy of the quenched solder by means of electric arc melting. After the master alloy is pulverized, it is put into the quartz glass tube of the HVDS-II high-vacuum single-roller strip machine. The quartz glass tube The nozzle is rectangular, its length is a=8mm, and its width is b=0.8mm;

[0044] (2) Clamp the quartz glass tube into the induction heating ring of the stripping machine, and adjust the distance from the nozzle to the surface of the copper roller to bn=1mm to ensure that the liquid sprayed on the copper roller is a flat flow and form a stable flow state...

Embodiment 3

[0054] Commercially available YG8 and 1Cr18Ni9Ti were connected by vacuum brazing with quenched solder.

[0055] The composition and content (by mass percentage) of the quenched solder are: Ag: 28%; Zn: 18%; Ni: 8%; Mn: 9.5%; Co: 3%; Sn: 1%;

[0056] The preparation method of this quenching solder comprises the following steps:

[0057] (1) Prepare the master alloy of quenched brazing filler metal by the method of electric arc smelting from the raw materials of the above ratio, crush the master alloy, and put it into the quartz glass tube of the HVDS-II high vacuum single-roll belt stripping machine. The nozzle of the quartz glass tube is rectangular, its length is a=10mm, and its width is b=1.5mm;

[0058] (2) Clamp the quartz glass tube into the induction heating ring of the stripping machine, and adjust the distance from the nozzle to the surface of the copper roller to bn=2mm to ensure that the liquid sprayed on the copper roller is a flat flow and form a stable flow sta...

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Abstract

The invention discloses a quenching solder for connecting hard alloy and steel as well as a preparation method and a connecting method of same. The quenching solder comprises the following components in percentage by weight: 28-33 percent of Ag, 18-20 percent of Zn, 1-8 percent of Ni, 5-9.5 percent of Mn, 3-6.5 percent of Co and 1-3 percent of Sn, and the balance of Cu. The preparation method of the quenching solder comprises the following steps: preparing the raw materials with the proportion into master alloy by adopting an electric arc melting method, continuously jetting a master alloy melt to the surface of a rotational cooling copper roller by using high-pressure argon to form a foil strip. A method for connecting the hard alloy and the steel by adopting the material comprises the following steps: carrying out surface treatment on the quenching solder, the hard alloy and the steel and then putting into a vacuum furnace by using a special fixture for brazing. The quenching solder has the advantages of low melting temperature, narrow melting interval, uniform solder melting and strong diffusivity of alloy elements; and through the connecting method, parts are wholly heated, the thermal stress is small, and the deformation can be controlled to a minimum limit, therefore, a stable and reliable joint can be obtained, and good joint strength is obtained.

Description

technical field [0001] The invention relates to the connection of dissimilar materials, in particular to a connection material and method for cemented carbide and steel, and belongs to the field of welding technology. Background technique [0002] The welded structure made of dissimilar materials can not only meet different requirements for materials under different working conditions, but also save a lot of precious materials, reduce costs, and give full play to the performance advantages of different materials. Dissimilar material welding structures are widely used in machinery, chemical industry, electric power, nuclear industry, aerospace and other industries, and dissimilar material welding is also receiving more and more attention. From the perspective of material combination and characteristics, the classification and welding combination of dissimilar materials mainly include welding of dissimilar steels, welding of steel and non-ferrous metals, welding of dissimilar ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K1/008B23K1/20C22C30/06C22C1/03B22D11/06
Inventor 许祥平邹家生夏春智王锡岭严铿刘欣杨芬
Owner JIANGSU UNIV OF SCI & TECH
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