Multi-stage forming operations
    61.
    发明授权
    Multi-stage forming operations 失效
    多阶段成型操作

    公开(公告)号:US3707407A

    公开(公告)日:1972-12-26

    申请号:US3707407D

    申请日:1970-04-21

    CPC classification number: C21D7/13 B21D22/201

    Abstract: A HIGH SPEED MULTI-STAGE FORMING OPERATION WITH INTERSTAGE HEAT ANNEALING WHICH INCLUDES THE STEPS OF IMMERSING, AT LEAST PART OF A FORMED WORKPIECEIN COOLANT LIQUID, HEATING SAID PART WHILE IMMERSED UNTIL IT REACHES THE ANNEALING TEMPERATURE, AND MOVING THE WORKPIECE WHILE STILL IN THE COOLANT LIQUID TOWARDS THE NEXT FORMING STAGE WITH THE HEATED PART REMAINING IMMERSED IN THE LIQUID FOR A TIME SUFFICIENT TO COOL THE HEATED PART BELOW THE TEMPERATURE AT WHICH SIGNIFICANT OXIDATION CAN OCCUR.

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