Abstract A wear-resistant and self-lubricatory cast iron for use with a compositely electroplated layer of a high wear resistance in sliding contact relation. The cast iron contains, in addition to carbon, silicon, manganese and chromium, cobalt for solid solubilization with the iron matrix and provision of high heat resistance, molybdenum and niobium for formation of such specific granular carbides as composite carbides of molybdenum and carbides of niobium and providing a high wear resistance, nickel for acceleration of graphitization and even distribution of fine and dense graphite in the iron matrix, and boron for aid of such acceleration in cooperation with the molybdenum thus providing high lubricity, the remainder being iron and impurities.
A CAST IRON FOR USE IN A SLIDING CONTACT SURFACE OF A FIRST MECHANICAL PART ADAPTED TO COOPERATIVELY CONTACT IN SLIDING MOTION WITH A COMPOSITELY ELECTROPLATED LAYER WHEREIN NICKEL AND A SILICON CARBIDE ARE COPRECIPITATED OF A CORRESPONDING SECOND MECHANICAL PART, SAID LAYER BEING SUBJECTED TO SURFACE TREATMENT THEREBY TO CAUSE PARTICLES OF SAID SILICON CARBIDE TO PRODUCE FROM ABOVE THE SURFACE OF THE NICKEL CONSTITUTING A MATRIX IN SAID ELECTROPLATED LAYER, SAID CAST IRON CONSISTING ESSENTIALLY OF 1.0 TO 3.5 PERCENT OF TOTAL CARBON, 0.5 TO 3.0 PERCENT OF SILICON, 0.1 TO 1.5 PERCENT OF MANGANESE, 0.1 TO 2.0 PERCENT OF CHORMIUM, 1.0 TO 15.0 PERCENT OF COBALT, 0.5 TO 10.0 PERCENT OF MOLYBDENUM, 0.1 TO 5.0 PERCENT OF NICKEL, 0.05 TO 2.0 PERCENT OF NIOBIUM, 0.001 TO 0.1 PERCENT PF BORON, AND A REMAINDER OF IRON AND IMPURITIES ALL PERCENTAGES BEING BY WEIGHT.
Claim 2
Dependent Claim
145 words
A CAST IRON FOR USE IN A SLIDING CONTACT SURFACE OF A FIRST MECHANICAL PART ADAPTED TO COOPERATIVELY CONTACT IN SLIDING MOTION WITH A COMPOSITELY ELECTROPLATED LAYER WHEREIN NICKEL AND A SILICON CARBIDE ARE COPRECIPITATED OF A CORRESPONDING SECOND MECHANICAL PART, SAID LAYER BEING SUBJECTED TO SURFACE TREATMENT THEREBY TO CAUSE PARTICLES OF SAID SILICON CARBIDE TO PRODUCE FROM ABOVE THE SURFACE OF THE NICKEL CONSTITUTING A MATRIX IN SAID ELECTROPLATED LAYER, SAID CAST IRON CONSISTING ESSENTIALLY OF 1.0 TO 3.5 PERCENT OF TOTAL CARBON, 0.5 TO 3.0 PERCENT OF SILICON, 0.1 TO 1.5 PERCENT OF MANGANESE, 0.1 TO 2.0 PERCENT OF CHORMIUM, 1.0 TO 15.0 PERCENT OF COBALT, 0.5 TO 10.0 PERCENT OF MOLYBDENUM, 0.1 TO 5.0 PERCENT OF NICKEL, 0.05 TO 2.0 PERCENT OF NIOBIUM, 0.001 TO 0.1 PERCENT PF BORON, AND A REMAINDER OF IRON AND IMPURITIES ALL PERCENTAGES BEING BY WEIGHT.