Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gradient Sandwich Filler for Carbide Brazing

A cemented carbide and sandwich technology, which is applied in the direction of welding/cutting medium/material, welding equipment, welding medium, etc., can solve problems such as easy cracking, low brazing seam strength, and large residual stress of joints, etc., to prolong service life and improve The strength of the brazing seam and the effect of reducing the residual stress

Active Publication Date: 2021-04-02
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a gradient sandwich solder for hard alloy brazing, which solves the problems of large joint residual stress, easy cracking, and low strength of the brazing seam when the existing solder is used for brazing of hard alloy and steel.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] To prepare Ag50Cu15Zn22.8Ni5Mn7RE0.2 / CuMn25 / Ag50Cu20Zn28Ni2 gradient sandwich solder, the specific steps are:

[0025] (1) First prepare Ag50Cu15Zn22.8Ni5Mn7RE0.2 alloy, melt copper and nickel in an intermediate frequency furnace, add silver when the temperature reaches 1150~1200 °C, and use dehydrated borax and boric anhydride in a weight ratio of 7:3 after fully fused compound Cover with salt, then add manganese and rare earth, when the temperature drops to 850~900℃, add zinc to continue fusion; after zinc is fully fused, let the molten metal stand for 30~60min and then cast it into an ingot of 25mm*200mm*80mm, Milling off the oxide slag inclusions on the surface of the ingot for later use;

[0026] (2) To prepare CuMn25 alloy, weigh copper and melt it in an intermediate frequency furnace. After it is fully fused, cover it with compound salt, then add manganese. After the manganese is fully fused, let the molten metal stand for 30-60 minutes and then cast it into 25mm...

Embodiment 2

[0032] Prepare Ag25Cu32Zn29Ni1.5Mn12RE0.5 / CuMn10 / Ag25Cu40Zn33.5Ni1.5 gradient sandwich solder, the specific steps are:

[0033] (1) First prepare Ag25Cu32Zn29Ni1.5Mn12RE0.5 alloy, melt copper and nickel in an intermediate frequency furnace, add silver when the temperature reaches 1150~1200 ° C, and fully fuse with dehydrated borax and boric anhydride in a weight ratio of 7:3. Cover with salt, then add manganese and rare earth, when the temperature drops to 850~900℃, add zinc to continue fusion; after zinc is fully fused, let the molten metal stand for 30~60min and then cast it into an ingot of 25mm*200mm*80mm, Milling off the oxide slag inclusions on the surface of the ingot for later use;

[0034] (2) To prepare CuMn10 alloy, weigh copper and melt it in an intermediate frequency furnace, cover it with compound salt after it is fully fused, then add manganese, and after the manganese is fully fused, let the molten metal stand for 30-60 minutes and then cast it into 25mm*200mm ...

Embodiment 3

[0040] To prepare Ag45Cu31Zn15Ni2Mn6RE1 / CuMn15 / Ag45Cu38Zn15Ni2 gradient sandwich solder, the specific steps are:

[0041] (1) First prepare the Ag45Cu31Zn15Ni2Mn6RE1 alloy, melt copper and nickel in an intermediate frequency furnace, add silver when the temperature reaches 1150~1200°C, cover it with a compound salt of dehydrated borax and boric anhydride in a weight ratio of 7:3 after fusion, and then Add manganese and rare earth, and when the temperature drops to 850~900°C, add zinc and continue to fuse; after the zinc is fully fused, let the molten metal stand for 30~60 minutes and then cast it into an ingot of 25mm*200mm*80mm. The ingot is ready for use after milling off the oxide slag inclusions on the surface;

[0042] (2) To prepare CuMn15 alloy, weigh copper and melt it in an intermediate frequency furnace. After it is fully fused, cover it with compound salt, then add manganese. After the manganese is fully fused, let the molten metal stand for 30-60 minutes and then c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides gradient sandwich solder for cemented carbide brazing. The gradient sandwich solder is prepared by compounding three layers of alloys including AgCuZnNiMnRE, CuMn and AgCuZnNi,wherein the CuMn alloy is located between the AgCuZnNiMnRE alloy and the AgCuZnNi alloy. A preparation method comprises the steps that the AgCuZnNiMnRE alloy, the CuMn alloy and the AgCuZnNi alloy areprepared separately; the prepared AgCuZnNiMnRE alloy, CuMn alloy, AgCuZnNi alloy are subjected to ultrasonical cleaning; lamination is carried out in the order of the AgCuZnNiMnRE alloy, CuMn alloy and AgCuZnNi alloy; the laminated alloys are placed in a gas-protected diffusion soldering furnace for diffusion brazing; then, isothermal shift extrusion, on-line annealing, and multi-pass small ratiorolling are carried out; and finally, a thin-strip solder with a thickness of 0.2-0.3 millimeter is obtained. According to the gradient sandwich solder, the preparation method is easy and convenientto operate, good in stability and low in cost; the problem of poor reliability of traditional solder with hard chunk alloys is solved; the residual stress of joints is significantly reduced; the strength of brazing seams during work is improved; and the service life of welded workpieces is prolonged.

Description

technical field [0001] The invention relates to the technical field of gradient sandwich solder, in particular to gradient sandwich solder for cemented carbide brazing. Background technique [0002] Large cemented carbide cutting tools are widely used in rail transit, oil drilling, geological exploration and other fields, and they play the role of advancing the "vanguard" in construction. The tool is subjected to various complex soil forces, and the working conditions are extremely harsh, which can easily cause the carbide on the tool to fall off and break, increasing the number of tool replacements, greatly affecting the progress of the project and increasing the risk of landslides. Therefore, the reliability of cutting tools has become an important factor that dominates the operating efficiency and economy of equipment; [0003] Large cemented carbide tools are mainly brazed by cemented carbide and steel-based cutter bodies. This type of tool is connected by dissimilar ma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/24
CPCB23K35/0238B23K35/24
Inventor 张冠星钟素娟裴夤崟何鹏侯江涛李永张雷董宏伟
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com