Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Hard Particle Mixed Silver-Copper Based Brazing Filler Material for Joining Diamond to Steel Substrate
Categories for this Invention
Technology: Filler Material For Joining Diamond to Steel Substrate
Category: Assistive, Test Equipment & Design Manufacturing
Industry: Abrasive Manufacturers, cutting tool Manufacturers
Application: Machining operation
Market: The global market size estimated at USD 47.34 billion in 2024, and is expected to reach USD 66.83 billion by 2029, growing at a CAGR of greater than 5% during the forecast period
(2024-2029).
Problem Statement
- Diamond is used in super-abrasives for cutting/grinding tools like grinding wheels, dressing and truing tools, and honing discs.
- Electroplating or brazing technology is used to join diamond grits with a metal substrate.
- Brazing technology offers superior joint strength by developing a chemical bridge at the grit-alloy interface.
- Diamonds metastable at higher temperatures can deteriorate cutting edge sharpness and cause micro-cracks.
- Low melting temperatures and soft or ductile-based filler alloys are suggested to address these issues.
- Active Ag-based filler alloys have lower hardness value, leading to inferior abrasion resistance.
- Need for improved filler alloy formulations and silver-copper-based filler material for diamond to steel substrates.
Technology
Formulation of active brazing filler alloy (ABF1)
Formulation of active brazing filler alloy (ABF2)
Key Features / Value Proposition
Filler Material
Vacuum Level
- The filler material wherein the vacuum level maintained during the brazing process was in the range of 10-6 to 10-7 mbar.
Heating Temperature
- The filler material wherein the entire assembly is heated inside a high vacuum environment to a temperature of 850 °C.
Wear Resistance
- The filler material wherein the nano-diamond added filler demonstrates wear resistance property by 50-60% and the brazed joint strength is reduced by 30-40%
Abrasion resisitance
- Filler alloy exhibited a significant increase in the abrasion resistance property by about 73-91% and the brazed joint strength was reduced by an extent of 20-30%
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Amitava Ghosh
Department of Mechanical Engineering
Intellectual Property
IITM IDF Ref. 1707
Patent No: IN 461065
Technology Readiness Level
TRL- 4
Experimentally validated in Lab