Industrial Heating September 2011 by Reed Miller

By Reed Miller

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3. 5-mm (dia) x 60-mm cylindrical Inconel 600 probe when quenched in a series of vegetable oils and two petroleum oils: Microtemp 157 (T 157), an unaccelerated (slow) oil, and Microtemp 153B (T 153B), an accelerated (fast) oil Conclusions A brief historical overview of the use of vegetable oils as quenchants for steel has been provided. It was also shown that the quenching mechanism exhibited by vegetable oils is fundamentally different than that traditionally observed for petroleum-oil quenchants.

Full in house engineering and flexible manufacturing capabilities permit custom integration with existing lines. 8500 weight of 6,118 pounds. The load consisted of eight different heats of material from the mill. The customer purchase order required the heat treater to age harden their material to a H1100 condition per AMS 2759 E. All bars were fully supported on a 24-foot-long furnace bed. Round stainless steel dummy blocks of similar cross sections were used for internal thermocouple measurement at both ends of the bed.

While still limited in its flow due to the use of nozzles, the tangential quench uses the geometry of the spray pattern to try to better cut through the vapor layer of the Leidenfrost Effect. While effective in its initial contact with the product, quenchant delivered via tangential quenches can experience spray interference. The low angle of contact from each nozzle’s spray results in the quenchant deflecting into the spray of adjacent nozzles. This reduces the velocity of the quenchant and limits its agitation effectiveness and its surface impingement.

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