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Material for casting exhaust manifold
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An exhaust manifold, mass percentage technology, applied to exhaust devices, mechanical equipment, engine components, etc., to achieve cost saving, high temperature bearing capacity and durability, and improve wear resistance
Inactive Publication Date: 2018-04-20
绩溪县徽洋车桥有限责任公司
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Abstract
Description
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Problems solved by technology
[0011] Good process performance and low cost; there are many types of heat-resistant and high-temperature-resistant metal materials, but due to the complex shape of the exhaust manifold, the material used to manufacture the exhaust manifold must have good processability, and its cost must meet The needs of mass production in the automotive industry
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Embodiment 1
[0022] A material for casting an exhaust manifold, consisting of the following chemical components in mass percentage: C 0.2%, Si 1.2%, Al 0.1%, Mn 0.1%, Cr 20%, Ni 22%, Mo 0.6%, Ba 0.7 %, Ce 4%, N 0.9%, Nb 1.5%, P 0.02%, S 0.11%, Ti 5%, V 6%, and the rest is Fe.
Embodiment 2
[0024] A material for casting exhaust manifolds, consisting of the following chemical components in mass percentage: C 0.6%, Si 2.6%, Al 0.5%, Mn 0.3%, Cr 24%, Ni 26%, Mo 0.8%, Ba 1.1 %, Ce 7%, N 1.6%, Nb 1.9%, P 0.05%, S 0.16%, Ti 7%, V 8%, and the rest is Fe.
Embodiment 3
[0026] A material for casting an exhaust manifold, consisting of the following chemical components in mass percentage: C 0.4%, Si 1.9%, Al 0.3%, Mn 0.2%, Cr 22%, Ni 24%, Mo 0.7%, Ba 0.9 %, Ce 5%, N 1.3%, Nb 1.7%, P 0.04%, S 0.13%, Ti 6%, V 7%, and the rest is Fe.
[0027] The material composition mainly includes high content of Cr and Ni. Ni and Cr are anti-oxidation and stable matrix elements, and are basic elements of heat-resistant cast steel. The content is generally 18-32%; The oxidation resistance of steel, the content is generally 8-25%; the C content is generally 0.2-0.6%. At the same time, in order to improve the oxidation resistance and high-temperature strength of steel, alloying elements such as Nb, Mo, and N are added to the steel, and the high-temperature strength of the steel is improved through solid solution strengthening, precipitation strengthening, and grain boundary strengthening.
[0028] The beneficial effects of the present invention are: (1) appropria...
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Abstract
The invention provides a material for casting an exhaust manifold. The material for casting the exhaust manifold is composed of the following chemical ingredients of, in percentage by mass, 0.2-0.6% of C, 1.2-2.6% of Si, 0.1-0.5% of Al, 0.1-0.3% of Mn, 20-24% of Cr, 22-26% of Ni, 0.6-0.8% of Mo, 0.7-1.1% of Ba, 4-7% of Ce, 0.9-1.6% of N, 1.5-1.9% of Nb, 0.02-0.05% of P, 0.11-0.16% of S, 5-7% of Ti, 6-8% of V and the balance ferrum. The material for casting the exhaust manifold has the beneficial effects that (1), an appropriate amount of alloying elements of chromium, nickel, molybdenum, nitrogen, aluminum and silicon and the like are added in the exhaust manifold material, and the abrasive resistance and oxidation corrosion resistance of final exhaust manifold products are improved and enhanced to a certain extent; (2), automobile exhaust manifolds fabricated by the material for casting the exhaust manifold have higher temperature bearing capacity and durability, the quality of products is improved, the service life of products is prolonged, and to some extent, the cost is also saved.
Description
technical field [0001] The invention relates to the field of auto parts production, in particular to a material for casting exhaust manifolds. Background technique [0002] The exhaust manifold is connected to the cylinder block of the engine, and the exhaust of each cylinder is collected and introduced into the exhaust manifold, with divergent pipelines. The main requirements for it are to minimize exhaust resistance and avoid mutual interference between cylinders. When the exhaust is too concentrated, there will be mutual interference between the cylinders, that is, when a certain cylinder exhausts, it happens to encounter the undischarged exhaust gas from other cylinders. In this way, the resistance of the exhaust will be increased, thereby reducing the output power of the engine. The solution is to separate the exhaust of each cylinder as far as possible, one branch for each cylinder, or one branch for two cylinders, and make each branch as long and shaped as possible ...
Claims
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Application Information
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