Heat-resisting cast steel turbocharger turbine shell iron mold sand-coated casting process

A sand-coated technology for turbochargers and iron molds, which is applied in the field of casting of mechanical parts, can solve the problems of low process yield, low yield, and many casting defects of turbocharger turbine shells, etc., to improve product quality , Reduce tissue differences, eliminate shrinkage porosity and shrinkage cavity defects

Pending Publication Date: 2018-02-27
西峡县内燃机进排气管有限责任公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a heat-resistant cast steel turbocharger turbine casing iron mold sand-covered casting process to solve the problem of many casting defects and low yield of the turbocharger turbine casing produced by the existing casting process And technical problems of low process yield

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  • Heat-resisting cast steel turbocharger turbine shell iron mold sand-coated casting process
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  • Heat-resisting cast steel turbocharger turbine shell iron mold sand-coated casting process

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[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner" and "outer" are all based on the orientations or positional relationships shown in the accompanying drawings, only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that...

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Abstract

The invention relates to the technical field of casting of mechanical parts and provides a heat-resisting cast steel turbocharger turbine shell iron mold sand-coated casting process which is designedfor solving the problems that turbocharger turbine shells manufactured through an existing casting process have more casting defects and are low in finished product rate and process yield. The heat-resisting cast steel turbocharger turbine shell iron mold sand-coated casting process comprises an iron mold sand-coated mold and a melting process. The iron mold sand-coated mold comprises a shell-shaped mold. An inner cavity of the shell-shaped mold is provided with a sand-coated layer with different thicknesses. In the casting process, a mold core is put into the shell-shaped mold, and molten steel is injected into the inner cavity of the shell-shaped mold through a gating system and molded. In the melting process, the tapping temperature of molten steel is 1700-1710 DEG C. The casting temperature of the molten steel is 1650-1670 DEG C. The time for casting 0.5 t of molten steel every time is controlled within 6-7 min. The heat-resisting cast steel turbocharger turbine shell iron mold sand-coated casting process provided by the invention is used for machining heat-resisting cast steel turbocharger turbine shells.

Description

technical field [0001] The invention relates to the technical field of casting of mechanical parts, in particular to a sand-coated iron mold casting process of a heat-resistant cast steel turbocharger turbine casing. Background technique [0002] With the development of high-end engines, turbochargers have gradually become the standard configuration of high-end engines. Along with the development of high-power engines, the temperature resistance requirements for turbochargers are also getting higher and higher. Sometimes the working temperature of turbochargers needs to reach 1050-1150 ℃, or even higher. However, conventional turbocharger housings made of ductile iron, silicon molybdenum, high nickel and other cast iron materials can no longer meet the requirements of use. In response to the above problems, some enterprises have proposed to use heat-resistant cast steel turbocharger shells, but due to the high melting temperature of heat-resistant cast steel materials, poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/06B22C9/22
CPCB22C9/06B22C9/22
Inventor 史玉锋李长武柴西成吕黎明张永福
Owner 西峡县内燃机进排气管有限责任公司
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