Fusion-joining coarse-surfaced high carbon ferrous metals to metals

Claim 1

THE METHOD OF FUSION-JOINING TO A COARSE-SURFACED HIGH CARBON CONTENT FERROUS METAL OBJECT, A PART COMPOSED OF A FUSION-JOINABLE METAL WHICH ORDINARILY CAN BE FUSION-JOINED READILY TO A LOW CARBON STEEL, BUT WHICH MAY BE FUSION-JOINED TO A COARSE-SURFACED HIGH CARBON CONTENT FERROUS METAL ORDINARILY IN ONLY A LIMITED WAY AND UNDER SPECIALLY DIFFERENT CONDITIONS, WHICH METHOD COMPRISES CLEANING FROM AT LEAST THE PORTION OF SAID FERROUS METAL OBJECT, WHICH WILL BE IN THE FUSION JUNCTION, ANY SOIL WHICH COULD PREVENT ELECTROPLATING ON SUCH PORTION AN ADHERENT ELECTRODEPOSIT OF IRON; THEREAFTER ELECTROPLATING ON AT LEAST SUCH PORTION OF SAID FERROUS METAL A FIRMLY ADHERENT AT LEAST MASKING ELECTRODEPOSIT OF IRON, WHILE SAID AT LEAST CLEANED PORTION WHICH IS TO BE IN THE FUSION JUNCTION IS IMMERSED AS A CATHODE IN AN AQUEOUS IRON-PLATING BATH HAVING A PH OF FROM 7 TO ABOUT 3.0 AND CONTAINING DISSOLVED THEREIN AN ORGANIC SEQUESTERING AGENT IN AN AMOUNT SUBSTANTIALLY SUFFICIENT FOR ANY IRON DERIVATIVE IN THE BATH TO BE PRESENT AS THE IRON CHELATE OF SAID SEQUESTERING AGENT; REMOVING THE THUS IRON-PLATED FERROUS METAL FROM SAID BATH AND ANY PLATING SOLUTION ADHERING TO SAID METAL; AND THEREAFTER FUSION-JOINING SAID FUSION-JOINABLE METAL TO THE SAID FERROUS METAL OBJECT AT SUCH IRON-PLATED PORTION AND BY ANY SIMPLER FUSION-JOINING METHOD GENERALLY READILY APPLICABLE TO FUSION-JOINING TO A LOW CARBON STEEL.

Claim 2

THE METHOD OF FUSION-JOINING TO A COARSE-SURFACED HIGH CARBON CONTENT FERROUS METAL OBJECT, A PART COMPOSED OF A FUSION-JOINABLE METAL WHICH ORDINARILY CAN BE FUSION-JOINED READILY TO A LOW CARBON STEEL, BUT WHICH MAY BE FUSION-JOINED TO A COARSE-SURFACED HIGH CARBON CONTENT FERROUS METAL ORDINARILY IN ONLY A LIMITED WAY AND UNDER SPECIALLY DIFFERENT CONDITIONS, WHICH METHOD COMPRISES CLEANING FROM AT LEAST THE PORTION OF SAID FERROUS METAL OBJECT, WHICH WILL BE IN THE FUSION JUNCTION, ANY SOIL WHICH COULD PREVENT ELECTROPLATING ON SUCH PORTION AN ADHERENT ELECTRODEPOSIT OF IRON; THEREAFTER ELECTROPLATING ON AT LEAST SUCH PORTION OF SAID FERROUS METAL A FIRMLY ADHERENT AT LEAST MASKING ELECTRODEPOSIT OF IRON, WHILE SAID AT LEAST CLEANED PORTION WHICH IS TO BE IN THE FUSION JUNCTION IS IMMERSED AS A CATHODE IN AN AQUEOUS IRON-PLATING BATH HAVING A PH OF FROM 7 TO ABOUT 3.0 AND CONTAINING DISSOLVED THEREIN AN ORGANIC SEQUESTERING AGENT IN AN AMOUNT SUBSTANTIALLY SUFFICIENT FOR ANY IRON DERIVATIVE IN THE BATH TO BE PRESENT AS THE IRON CHELATE OF SAID SEQUESTERING AGENT; REMOVING THE THUS IRON-PLATED FERROUS METAL FROM SAID BATH AND ANY PLATING SOLUTION ADHERING TO SAID METAL; AND THEREAFTER FUSION-JOINING SAID FUSION-JOINABLE METAL TO THE SAID FERROUS METAL OBJECT AT SUCH IRON-PLATED PORTION AND BY ANY SIMPLER FUSION-JOINING METHOD GENERALLY READILY APPLICABLE TO FUSION-JOINING TO A LOW CARBON STEEL.