Federal-Mogul Corporation has developed a portfolio of materials hypertension (high temperature alloy) that help ensure long-term sealing gaskets exhaust manifold, especially when facing solutions to reduce emissions that are driving up temperatures at the exhaust beyond 1000 ° C.
"In some applications, we are fast approaching the point where the seals stainless steel multilayer reach their performance limits in terms of their mechanical and thermal properties," said Gerard Chochoy, executive vice president in charge of sealing and Engine Bearings Federal-Mogul. "The supercharger and exhaust gas recirculation (EGR) are also additional challenges due to the introduction of new interfaces or leak in the exhaust system. In these areas, the clearance between the mating surfaces and the deformation of the flanges are sometimes significant about the life cycle of the vehicle. More seals and increased thermal gradients, a conventional static seal is ineffective. "
Moreover, micro-sealing gasket exhaust manifold is also an essential criterion. Federal-Mogul has developed a high temperature coating (HTC) that can be applied to the parting line to seal the contacting surfaces and reduce micromotion. The coating is a HTC product diluted in a solvent to water, which removes its composition, the molybdenum disulphide. This treatment incorporates a triple system of binder, which provides both sealing capabilities and superior friction properties stable over a wide temperature range. "The HTC shows a thermal stability above 1000 ° C, whereas conventional coatings based on molybdenum are reduced to ashes at such temperatures," said Jim Zwick, Global Product Technology, gaskets and hot heat shields.
"In some applications, we are fast approaching the point where the seals stainless steel multilayer reach their performance limits in terms of their mechanical and thermal properties," said Gerard Chochoy, executive vice president in charge of sealing and Engine Bearings Federal-Mogul. "The supercharger and exhaust gas recirculation (EGR) are also additional challenges due to the introduction of new interfaces or leak in the exhaust system. In these areas, the clearance between the mating surfaces and the deformation of the flanges are sometimes significant about the life cycle of the vehicle. More seals and increased thermal gradients, a conventional static seal is ineffective. "
Moreover, micro-sealing gasket exhaust manifold is also an essential criterion. Federal-Mogul has developed a high temperature coating (HTC) that can be applied to the parting line to seal the contacting surfaces and reduce micromotion. The coating is a HTC product diluted in a solvent to water, which removes its composition, the molybdenum disulphide. This treatment incorporates a triple system of binder, which provides both sealing capabilities and superior friction properties stable over a wide temperature range. "The HTC shows a thermal stability above 1000 ° C, whereas conventional coatings based on molybdenum are reduced to ashes at such temperatures," said Jim Zwick, Global Product Technology, gaskets and hot heat shields.
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