Method of working steel machine parts including machining during quench cooling
Patent 4077812 Issued on March 7, 1978. Estimated Expiration Date: 
March 7, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 7, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2717846 3281287 3386862 3425877 3535910 3752709 InventorAssigneeApplicationNo. 05/669146 filed on 03/22/1976US Classes:148/653, With additional nonworking heating step148/320, Ferrous (i.e., iron base)148/654, Including cooling (e.g., quenching, etc.)148/659Including spheroidizingExaminersPrimary: Stallard, W.Attorney, Agent or FirmForeign Application Priority Data1975-03-25 JAAbstractThe invention provides a method of working steel machine parts, and it relates to a composite technique consisting of machining and heat-treatment, which makes use of the fact that at temperatures in the vicinity of or above the Ms point during quench cooling, the structure of steel assumes a state of supercooled austenite or a portion thereof assumes a state of martensite transformation or beinite transformation, suitable for machining, and in such state desired machining is applied to steel machine parts, which are then cooled to room temperature for hardening. Other merits and details will be made clear. | |
