Wire product and method of manufacture

Claim 1

A METHOD OF MANUFACTURING HEAT-RESISTANT COPPER ALLOY OF HIGH DUCTILITY TO PROVIDE FOR THE PRODUCTION OF ELECTRICAL WIRE THEREFROM ADAPTABLE FOR ELECTRICAL WIRING AND WIRE WRAPPING CONNECTIONS CHARACTERIZED BY THE STEPS OF PROVIDING A FOURELEMENT ALLOY CONSISTING OF 0.2 - 0.5 WT-PERCENT CADMIUM, 0.03 - 0.2 WT-PERCENT SILVER, 0.2 - 0.7 WT-PERCENT CHROMIUM AND THE REMAINDER COPPER WHEREIN IN PRODUCING THE ALLOY, CHROMIUM, THEN SILVER, AND THEN CADMIUM ARE ADDED IN THE NAMED ORDER TO THE MOLTEN COPPER, SUBJECTING THE COPPER ALLOY TO A SOLUTION HEAT TREATMENT FOR 0.5 TO 2 HOURS AT A TEMPERATURE OF 900*C TO 1000*C AND THEREAFTER RAPIDLY COOLING THE ALLOY, COLD WORKING THE COPPER ALLOY TO PROVIDE A COLD DRAFT OF 50 PERCENT OR MORE TO DRAW THE SAME INTO A FINE WIRE, AND THEREAFTER AGE TREATING THE WIRE FOR 0.5 TO 2.5 HOURS AT A TEMPERATURE OF 450*C TO 550*C.

Claim 2

A METHOD OF MANUFACTURING HEAT-RESISTANT COPPER ALLOY OF HIGH DUCTILITY TO PROVIDE FOR THE PRODUCTION OF ELECTRICAL WIRE THEREFROM ADAPTABLE FOR ELECTRICAL WIRING AND WIRE WRAPPING CONNECTIONS CHARACTERIZED BY THE STEPS OF PROVIDING A FOURELEMENT ALLOY CONSISTING OF 0.2 - 0.5 WT-PERCENT CADMIUM, 0.03 - 0.2 WT-PERCENT SILVER, 0.2 - 0.7 WT-PERCENT CHROMIUM AND THE REMAINDER COPPER WHEREIN IN PRODUCING THE ALLOY, CHROMIUM, THEN SILVER, AND THEN CADMIUM ARE ADDED IN THE NAMED ORDER TO THE MOLTEN COPPER, SUBJECTING THE COPPER ALLOY TO A SOLUTION HEAT TREATMENT FOR 0.5 TO 2 HOURS AT A TEMPERATURE OF 900*C TO 1000*C AND THEREAFTER RAPIDLY COOLING THE ALLOY, COLD WORKING THE COPPER ALLOY TO PROVIDE A COLD DRAFT OF 50 PERCENT OR MORE TO DRAW THE SAME INTO A FINE WIRE, AND THEREAFTER AGE TREATING THE WIRE FOR 0.5 TO 2.5 HOURS AT A TEMPERATURE OF 450*C TO 550*C.

Claim 3

A method of manufacturing heat-resistant copper alloy of high ductility to produce electrical wire adaptable for wire wrapping connections because of improved wrapping force characterized by the steps of first preparing a chromium copper alloy by heating oxygen-free copper in excess of 1000*C and thereafter adding chromium to the molten copper, secondly, adding silver to the molten chromium copper alloy and thirdly, adding cadmium to the molten alloy, all of these constituents added to produce a four-element alloy consisting of 0.2 - 0.5 wt-percent cadmium, 0.03 -0.2 wt-percent silver, 0.2 - 0.7 wt-percent chromium, and the remainder copper, molding the produced copper alloy ingot, heating and hot rolling the copper alloy ingot at a temperature of 800*C to 980*C, subjecting the copper alloy to a solution heat treatment for 0.5 to 2 hours at a temperature of 900*C to 1000*C, rapidly cooling the copper alloy to maintain at room temperature the solid solution state of chromium in the alloy obtained by solution heat treatment, cold working the copper alloy to provide a cold draft of 50 percent or more to draw the alloy into a fine electrical wire, and thereafter aging by heat treating the wire for 0.5 to 2.5 hours at a temperature of 450*C to 550*C.

Claim 4

A method of manufacturing heat-resistant copper alloy of high ductility to produce electrical wire adaptable for wire wrapping connections because of improved wrapping force characterized by the steps of first preparing a chromium copper alloy by heating oxygen-free copper in excess of 1000*C and thereafter adding chromium to the molten copper, secondly, adding silver to the molten chromium copper alloy and thirdly, adding cadmium to the molten alloy, all of these constituents added to produce a four-element alloy consisting of 0.2 - 0.5 wt-percent cadmium, 0.03 -0.2 wt-percent silver, 0.2 - 0.7 wt-percent chromium, and the remainder copper, molding the produced copper alloy ingot, heating and hot rolling the copper alloy ingot at a temperature of 800*C to 980*C, subjecting the copper alloy to a solution heat treatment for 0.5 to 2 hours at a temperature of 900*C to 1000*C, rapidly cooling the copper alloy to maintain at room temperature the solid solution state of chromium in the alloy obtained by solution heat treatment, cold working the copper alloy to provide a cold draft of 50 percent or more to draw the alloy into a fine electrical wire, and thereafter aging by heat treating the wire for 0.5 to 2.5 hours at a temperature of 450*C to 550*C.