An electronic switch circuit is described for a capacitor spark-discharge hardening process which permits hard coatings to be deposited on suitable substrates at coverage rates of up to 9cm2 min−1, about an order of magnitude higher than by conventional mechanical switching means. The process was evaluated in a hot-forging die-life programme, where it was found that the life of extrusion pinion dies could be increased significantly (> 10%) by the coating process.
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References
1.
WELSHN. C.:J. Inst. Met., 1959-60, 88, 103–111.
2.
WELSHN. C. and wArrsP. E.: J. Iron Steel Inst., 1961, 198, 30–37.
3.
WELSHN. C. and WATTSP. E.: Wear, 1962, 5, 289–307.
4.
GOLDSCHMIDTH. J.: Iron Steel, 1959, 32,469–471.
5.
VADYANATHANS. and VENKATESHV. C.: Tribology Mr., 1974, 7, 54–58.
