1. Ferrous metals, nonferrous metals, such as Kovar alloy, the non - standard pieces of metal processing.

2. The Kovar alloy used for the outlet of fixed circuit often is plated to preserve from corrosion. But the outlet of fixed circuit often is plated to preserve from corrosion.

3. The kovar scrap is first dissolved with hydrochloric acid and chlorine.

4. The low-cobalt kovar alloy 4J461 with a little Zr is a new type metal-ceramic sealing alloy with good performance and low cost.

5. Glass-Kovar joints sometimes start to leak in the Kovar due to crystallization.

6. The project solves the technique difficulties of biomaterial connection, tube-shell mechanical strength, ultrafine kovar glass and leaking of welded joint and the problem of industrialization.

7. The invention provides a method for soldering aluminum silicon carbide composite and kovar alloy used in microelectronic encapsulation and pertains to the field of metal shell encapsulation.

8. This paper presents a flow-sheet for recovering gold, cobalt and nickel from goldcontaining kovar scrap.

9. When the plating exist defect, the gold - plating nickel - plating both promote the stress - corrosion fracture of Kovar alloy.

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10. The surface micrographs of halo and cross-sections of glass and kovar were investigated by SEM, and the chemical composition of halos was studied by EDS analysis.

11. When defect exists in the plating the gold—plating, nickel—plating both promote the stress—corrosion fracture of the Kovar alloy.