Uni-Max-Case and Progressive Spin Hardening: Penna Flame Industries

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ADVANCED TECHNOLOGY

• Uni-Max-Case

• Temperature Controlled

• Increase Efficiency

• Guaranteed Consistency

Progressive-spin hardening (the uni-max-case) is the method employed for hardening rolls, tubes, cylinders and piston rods. The part is loaded into a lathe either vertically or horizontally.

A custom-designed ring-burner encircles the part. The coupling distance between the part and flame-head and number of heating tips is determined by the material, hardness and case-depth requirements. Following the heating ring is the quench. As the part rotates, the heating ring and quench is traversed across the face of the roll at a given speed. For years, this has been adequate, and for many applications, it still is.

Precision surface hardening now utilizes digital high-speed optical resolution non-contact infrared thermometers as the key for control and repeatability. Each pyrometer unit is equipped with laser sighting, which allows pinpoint placement for extreme accuracy of surface temperature monitoring. Each unit has its own digital readout and is tied into a virtual chart recorder for traceability.

Because all metals tend to distort during the heat treating process it is sometimes necessary to straighten after flame hardening. This 290 ton press allows us to cold or hot straighten parts so that only a minimum amount of grinding is necessary.

Tempering is necessary to complete the hardening process. Untempered martensite can prove to be detrimental to the life of the roll. Each roll is tempered to the required hardness, then inspected. Each and every roll is checked for surface hardness, magnetic particle inspected then non-destructively evaluated for case depth. All rolls are guaranteed to meet specification.

A consistent surface hardness, and a deep, uniform hardened case, with the stable martensite structure. Ready for finishing, to the tightest customer specifications.

Typical progressive methond applications include rolls and more.

For more information on the Uni-Max-Case, please review our featured article from Industrial Heating Magazine, December 2006.

For information on specific products, please fill out our
Request For Information form or contact Jim Orr at jimorr@pennaflame.com

"Pursuing Excellence"
1856 State Route 588 • Zelienople, Pennsylvania 16063-3902
PH: 800.245.5084 FAX: 724.452.0484

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