High-temperature-resistant turbocharger turbine wheel

A turbocharger, high-temperature-resistant technology, applied in the direction of machines/engines, blade support components, engine components, etc., can solve problems such as noise impact, noise, etc., and achieve the effect of reducing quality, reducing noise pollution, and good mechanical strength

Inactive Publication Date: 2016-05-25
NINGBO TIANGE AUTOMOBILE PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, when the turbocharger is working, it will also produce a certain amount of noise.
With the prolongation of use time, the noise impact will become more and more serious

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The turbocharger turbine body in the present embodiment comprises a ceramic filling part and a metal layer arranged on the outer layer of the ceramic filling part, and a NiCrAlY protective layer is also formed on the surface of the metal layer, wherein in the NiCrAlY layer (by mass percentage) Cr accounts for 28 %, Al accounts for 13%, Y accounts for 0.5%, and the balance is Ni.

[0030] Wherein, the ceramic filling part is a porous silicon nitride ceramic with a pore diameter of 50-100 μm and a porosity of 60-70%.

[0031] The metal layer is made of cobalt-based superalloy, which consists of the following components (by mass percentage): C: 0.15%, Ni: 8%, Cr: 15%, W: 10%, Mo: 0.3%, Nb: 0.5%, Ta: 0.3%, Ti: 0.1%, B: 0.003%, Zr: 0.1%, rare earth element: 0.05%, Fe: 2%, and the balance is Co and unavoidable impurity elements. Among them, the rare earth element is composed of 65% La and 35% Y.

Embodiment 2

[0033] The turbocharger turbine body in the present embodiment comprises a ceramic filling part and a metal layer arranged on the outer layer of the ceramic filling part, and a NiCrAlY protective layer is also formed on the surface of the metal layer, wherein in the NiCrAlY layer (by mass percentage) Cr accounts for 28 %, Al accounts for 13%, Y accounts for 0.5%, and the balance is Ni.

[0034] Wherein, the ceramic filling part is porous silicon nitride ceramics with a pore diameter of 50-100 μm and a porosity of 60-70%.

[0035] The metal layer is made of a cobalt-based superalloy, and the cobalt-based superalloy consists of the following components (by mass percentage): C: 0.2%, Ni: 10%, Cr: 18%, W: 12%, Mo: 0.5%, Nb: 0.8%, Ta: 0.5%, Ti: 0.3%, B: 0.005%, Zr: 0.3%, rare earth elements: 0.1%, Fe: 2%, and the balance is Co and unavoidable impurity elements. Among them, the rare earth element is composed of 65% La and 35% Y.

Embodiment 3

[0037]The turbocharger turbine body in the present embodiment comprises a ceramic filling part and a metal layer arranged on the outer layer of the ceramic filling part, and a NiCrAlY protective layer is also formed on the surface of the metal layer, wherein in the NiCrAlY layer (by mass percentage) Cr accounts for 28 %, Al accounts for 13%, Y accounts for 0.5%, and the balance is Ni.

[0038] Wherein, the ceramic filling part is a porous silicon nitride ceramic with a pore diameter of 50-100 μm and a porosity of 60-70%.

[0039] The metal layer is made of cobalt-based superalloy, which consists of the following components (by mass percentage): C: 0.23%, Ni: 11%, Cr: 20%, W: 12.5%, Mo: 0.6%, Nb: 1%, Ta: 0.6%, Ti: 0.4%, B: 0.0055%, Zr: 0.4%, rare earth element: 0.2%, Fe: 1%, and the balance is Co and unavoidable impurity elements. Among them, the rare earth element is composed of 65% La and 35% Y.

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Abstract

The invention relates to a high-temperature-resistant turbocharger turbine wheel. The turbocharger turbine wheel comprises a turbine body, wherein the turbine body comprises a ceramic filling part and a metal layer arranged on an outer layer of the ceramic filling part; the metal layer is made of cobalt-based high-temperature alloy; and the cobalt-based high-temperature alloy consists of the following components (in percentage by mass): 0.15-0.3% of C, 8-15% of Ni, 15-25% of Cr, 10-15% of W, 0.3-1% of Mo, 0.5-3% of Nb, 0.3-1% of Ta, 0.1-0.8% of Ti, 0.003-0.008% of B, 0.1-0.8% of Zr, 0.05-0.5% of rare earth elements, not more than 3% of Fe and the balance of Co and inevitable impurity elements. According to the turbocharger turbine wheel, the high-temperature usage performance of the turbine wheel is improved to a certain extent and the effects of absorbing sound, reducing noise and reducing turbine wheel mass can be achieved.

Description

technical field [0001] The invention relates to a turbocharger turbine, in particular to a high temperature resistant turbocharger turbine. Background technique [0002] A turbocharger is actually an air compressor, a special component that uses the exhaust gas from the engine to do work. Turbochargers can not only save energy and reduce emissions, but also effectively increase engine power, and have become one of the high-tech developments in the automobile manufacturing industry. [0003] The working environment temperature of the turbocharger is relatively high. The working temperature of the diesel engine supercharger is generally around 600°C. The working temperature of the gasoline engine supercharger is as high as 800-900°C. Up to 900-950°C. With the improvement of engine performance requirements, the working temperature of the turbocharger will be further increased. The turbocharger is mainly composed of a turbine part and a volute part. The turbine rotates at hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/07C22C19/05F01D5/02
CPCC22C19/07C22C19/058F01D5/02F05D2300/17
Inventor 董海波刘建设魏林陈威
Owner NINGBO TIANGE AUTOMOBILE PARTS CO LTD
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