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Brantford, United States

Li D.,Natural Resources Canada | Sloss C.,Wescast Industries Inc.
International Journal of Metalcasting | Year: 2015

Heat-resistant ferrous cast alloys are generally divided into four groups: ferritic cast iron, austenitic ductile iron, ferritic stainless steel, and austenitic stainless steel. There is an active debate about whether or not heat treatment should be imposed on these ferrous castings prior to placing them in service. In this investigation, a series of experiments were conducted to evaluate the effect of heat treatment on the microstructure, tensile properties, hardness, linear growth, and thermal fatigue life for alloys of each of the four groups. In general, heat treatment appeared to cause similar microstructural changes in these alloys such as the formation of precipitated particles adjacent to the cell boundary regions, but it also affected each material's properties in a different fashion. In spite of a slight increase in tensile elongation at room temperature, annealing had no impact on the ductility minima at medium temperatures for ferritic cast iron. Heat treatment did not appreciably alter the tensile properties of austenitic ductile iron. The Brinell hardness of ferritic stainless steel samples was reduced, but the hardness was increased for austenitic stainless steel samples after heat treatment. Copyright © 2015 American Foundry Society.


Li D.,Natural Resources Canada | Sloss C.,Wescast Industries Inc.
Materials Science and Engineering A | Year: 2015

This letter attempts to comment on the article by Ekström et al. [Mater. Sci. Eng. A 616, (2014) 78] in the aspects of elongation at room temperature, thermal conductivity, and microstructure of SiMo iron. © 2014 Published by Elsevier B.V.


Li D.,Wescast Industries Inc.
International Journal of Materials Research | Year: 2010

It is well known that ferritic cast irons with 4 to 5 wt.% Si provide good service and low cost in many elevated-temperature applications. In terms of cast iron microstructures, both spheroidal graphite and compacted graphite cast irons are currently used to produce engine exhaust manifolds and turbocharger housings. Between the two graphite morphologies, the mixed graphite microstructure has been proposed and evaluated in the aspects of molten metal treatment, solidification characteristic, microstructural stability, standard tensile testing, long-term hot oxidation and thermal cycling testing. The effects of graphite morphologies on the material properties are presented. The samples with mixed graphite structure showed an improved ductility at medium temperatures and thermal fatigue resistance. © 2010 Carl Hanser Verlag, Munich, Germany.


Patent
Wescast Industries Inc. | Date: 2010-10-13

A component of an exhaust system may convey exhaust gas between one or more inlets and one or more outlets and may include at least one fluid path in thermal communication with the exhaust gas. The fluid path may be defined by an external surface of the component and a cover plate attached to the external surface. The fluid path may be connected to a coolant source.


Patent
Wescast Industries Inc. | Date: 2014-07-23

A turbocharger system may include a turbine housing and a tongue insert. The turbine housing may include an inlet, an outlet, and a gas pathway between the inlet and outlet. The gas pathway may include a volute portion and an inlet portion extending approximately tangent to the volute portion. The turbine housing may be formed from a first material. The tongue insert may be received in the turbine housing and may at least partially define the volute portion and the inlet portion. The tongue insert may be formed from a second material that is more heat resistant than the first material.

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