Case Studies

Distortion

Distortion Minimization of a Press Quenched Bevel Gear

A combination of carburization and quench hardening is often used to increase the strength and improve fatigue performance of steel parts. During quenching, stresses caused by the thermal gradient and phase transformations will generate plastic deformation, which will lead to distortion in hardened

June 15, 2016

Quench

Distortion Analysis of Landing Gear during Oil Quench

Large distortions after oil quenching in the following distortion modes:
Bow in XY-Plane.
Bow in YZ-Plane.
Straightness of a Blind Hole.
All distortion modes shown in the figures make assembly of the entire structure very difficult.
Immersion into the oil tank is the main focus of the distortio

June 15, 2016

Induction

Scanning Induction Hardening of a Truck Axle

Axle shafts are typically case hardened using an induction process by rapidly heating to the material’s austenitizing temperature through the desired case depth. The shaft is then quenched to form martensite, leaving the surface harder than the base material and under a desirable, compressive residu

June 15, 2016

Quench

Quench and Temper of Steel Rolling Mill Roll​

Quench and temper hardening of a large high speed steel rolling mill roll requires optimizing depth of hardening and inprocess thermal gradients to maximize surface compression and minimize internal tensile stresses that increase likelihood of internal cracking. Model was developed to determine opti

June 15, 2016

Induction

Oil Hole Crack of Crankshaft During Induction Hardening​

Cracking at oil holes on pin and main bearing sections of crankshafts during induction hardening occurs due to thermal stress during spray quenching. The problem arises due to the angle of the hole and the nonuniform mass distribution.

June 15, 2016

Induction

Induction Hardening of Welded Tube Shaft​

In-process tensile stress in an induction hardened 4130/10B37 welded tube shaft was investigated. Thermal and transformation stresses during heat treatment were examined to determine source of bond line cracking and potential remedies.

June 15, 2016

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