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| Sandwich Type solder featured |
| Crack type after welding |
| Components of silver hardmetal |
| Production Dimension |
| Hard metal & Heat coefficient of thermal expansion |
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When hard metal is welded to the surface of steel with wide welding surface, hardmetal part may be broken in time of cooling contraction since it is different the coefficient of thermal expansion of basic material and hardmetal. To protect this crack and endure the hard impact and load in using device it must be used the [Sandwich Type] special Silver Filler Metal material containing pure copper layer within it. Because [Sandwich Type] special Silver Filler Metal material prevents the breakage of hardmetal in welding complex material and has sufficient resistance to the load and thermal stress.
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| Product Name |
Chemical Components(wt%) |
Reference Value(¡®C) |
Application |
| Ag |
Cu |
Zn |
Cd |
Ni |
Mn |
Solidus |
Liquidus |
Operating Temperature |
| BAg-3/Cu-D |
50 |
15.5 |
15.5 |
16 |
3 |
|
630 |
690 |
690-750 |
Hardmetal Brazing for the carbide tip for carbon steel and steel |
| HS-49D/Cu-D |
49 |
27.5 |
20.5 |
|
0.5 |
2.5 |
670 |
690 |
690-750 |
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| the coefficient of thermal expansion(650'C) |
Hard metal |
high-speed steel |
carbon steel |
| WC-Co Group |
WC-TiC-Co Group |
| X10-6/¡É |
4.5-5.5 |
0.4-7.2 |
12.0-12.6 |
14.7 |
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