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cold hobbed cavities

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Journal Articles
Alloy Digest (1976) 25 (7): TS-305.
Published: 01 July 1976
... MIRROMOLD is a case-hardening mold steel designed expressly for cold-hobbed cavities. It is a vanadium-treated, cold-melt, electric-furnace mold steel developed to provide: (1) Cleanness and uniformity, (2) Maximum hobability and (3) Uniform response to heat treatment. This datasheet provides...
Journal Articles
Alloy Digest (1982) 31 (5): TS-399.
Published: 01 May 1982
... AISI Type P4 is an alloy steel that develops exceptionally high strength which is retained at operating temperatures to 800 F. In the annealed condition (maximum Brinell hardness 135), cavities can be machined readily or produced by cold hobbing if the impressions are not too deep. Type P6 takes...
Journal Articles
Alloy Digest (1955) 4 (9): TS-37.
Published: 01 September 1955
... for a maximum BtineR of 109 to develop its maximum cold- hobbing properties. This hardness is obtained by heating to 1650 deg. F. followed by slow fumace- cooling to below 900 deg. F., after which the piece may be allowed to cool in air to room temperature If this grade is desired for use in machined cavi- ties...
Journal Articles
Alloy Digest (1957) 6 (6): TS-59.
Published: 01 June 1957
... operation. Like any other steel, however, it work hardens as a result of the cold hobbing, and for this reason, a Pro- cess Anneal or Stress Relieving operation is re- quired for very deep cavities, which involves difficult bobbing. For this stress relief, heating to 1200-1250 deg. F. is suggested. Make...
Journal Articles
Alloy Digest (1982) 31 (8): TS-403.
Published: 01 August 1982
... supplied to a maximum Brinell hardness of abour 115 for superior hobbing properties. For instance, using 110 tons (100,080 kg) pressure and a 0.910 in. (23. I mm) diameter bob, an impression of 0.710 in. (18 mm) in depth was pushed into a cavity 1% in. (44.5 mm) in diameter and 2% in. (57.1 mm) long...
Journal Articles
Alloy Digest (1965) 14 (9): TS-169.
Published: 01 September 1965
... to a softness of 100 max. Brinell. This means that it can be cold-hobbed with ease, even where deep or large cavities are used. It responds readily to heat treatment and produces a core hardness of approximately Cl5 Rockwell. The case- hardening of the surface results in a high surface hardness of C65 Rockwell...
Journal Articles
Alloy Digest (1970) 19 (4): TS-230.
Published: 01 April 1970
... AISI Type P2 is a cold hobbing alloy mold steel exhibiting a combination of ease in hobbing and good core strength. It is recommended for case hardened molds for plastics. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also...
Journal Articles
Alloy Digest (1982) 31 (1): TS-393.
Published: 01 January 1982
.... Then air-cool to room temperature. The resulting hardness is Brinell212 maximum. Stress Relieving: Cold-work operations such as grinding, hob- bing, deep stamping, straightening, and heavy machining may cause stresses to build up in the work piece. To relieve these stresses, heat the piece to 1000┬░F, hold...
Journal Articles
Alloy Digest (1985) 34 (3): TS-437.
Published: 01 March 1985
..., shear blades. shear knives. chisels. rivet sets. gripper and header dies, zinc die-casting dies, mold dies for plastics. punches, swaging dies and pneumatic tools. slitting cutters, master hobs, machined-cavity molds. and many general-purpose tools. Manufacturer: Latrobe Steel Company Subsidiary...
Journal Articles
Alloy Digest (1979) 28 (6): TS-350.
Published: 01 June 1979
... dies, hot-heading dies, gripper dies, engraving dies, machined cavities for plastics, mold inserts, low-temperature diecasting dies, shear blades and cold-forming inserts. Manufacturer: Uddeholms Aktiebolag, Sweden. In USA: Uddeholm Steel Corporation Totowa, New Jersey 07511. ...
Journal Articles
Alloy Digest (1956) 5 (9): SS-47.
Published: 01 September 1956
..., Stainless No. 2 can be moderately cold formed, headed, hobbed and upset IC m be readiiy forged, hot headed and hot upset Preheating for hot working insures the best results. Because this steel is air- hardening, aII hot worked parts should be furnace c00Ied to prevent cracking. Dry warm lime or ashes can he...
Journal Articles
Alloy Digest (1954) 3 (4): TS-20.
Published: 01 April 1954
... procedures. Forms Available: Billets, bars and forgings. Applications: Rivet sets. hoc gripper dies, punches, chisels, moil points, forming dies, hoc headers, blanking dies, master hobs, machined-cavity molds, and many general-purpose cools and dies, plastic molding and die-casting dies. Manufacturer...