Technology for machining positioning rings
A processing technology and positioning ring technology, applied in the direction of metal material coating process, manufacturing tools, coatings, etc., can solve the problems of insufficient wear resistance, low hardness of positioning ring, etc., to reduce performance, reduce notch sensitivity, eliminate Effect of residual internal stress
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[0016] Below in conjunction with embodiment the present invention will be further described, and its operating steps are as follows:
[0017] A positioning ring processing technology, the processing technology comprises the following steps:
[0018] (1) Process flow: blanking→forging→annealing→machining→quenching and tempering→machining→ion nitriding→inspection→finished product;
[0019] (2) Material selection: 38CrMnAl steel is selected;
[0020] (3) Forging: heating temperature 1100-1150°C, initial forging temperature 1150-1250°C, final forging temperature > 880°C;
[0021] (4) Annealing: heating with furnace temperature, heating temperature 940-980 ℃, holding time 2-2.5h, cooling with furnace, cooling medium air;
[0022] (5) Machining: rough machining to obtain rough parts;
[0023] (6) Quenching and tempering treatment: quenching treatment, heating furnace to 960-990°C, heating medium nitrogen, holding time 3-3.5h, quenching oil and cooling through; high temperature te...
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