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Zhao X.-W.,Xixia Intake and Exhaust Manifold Co.
Zhuzao/Foundry | Year: 2014

The causes and solutions for some defects of high-nickel austenite ductile iron and ductile iron with the same casting defects are various. Due to the characteristic of its solidification for high-nickel austenite ductile iron, its main defects are shrinkage, dispersed shrinkage, flake graphite and blowhole. It is foundry men's top priority to analysis the cause of the defects and put forward preventive plans. ©, 2014, Zhuzao/Foundry. All right reserved. Source


Zhang J.-Q.,Xixia Intake and Exhaust Manifold Co. | Zhao X.-W.,Xixia Intake and Exhaust Manifold Co.
Zhuzao/Foundry | Year: 2012

The numerical simulation of exhaust manifold casting during solidification and filling was conducted with InteCAST software for product development. The location and causes of shrinkage and dispersed shrinkage were analyzed in different stages. The satisfactory simulation results were obtained by optimizing pouring and feeding system, and reasonably structure modification. The operation process was controlled strictly, one trial-manufacture is successful, and the product development cycle was shorted. Source


Tian S.-T.,Xixia Intake and Exhaust Manifold Co. | Zeng B.,Shanghai Automotive Group Co. | Zhao X.-W.,Xixia Intake and Exhaust Manifold Co.
Zhuzao/Foundry | Year: 2013

The structure of exhaust manifold was analyzed by CAE software to solve its cracks during the bench test. The result show that the located groove resulted in the cracks of the exhaust manifold during the bench test The cracks were removed after the optimization of the structure of the exhaust manifold. Source


Cheng W.-C.,Xixia Intake and Exhaust Manifold Co. | Zhao X.-W.,Xixia Intake and Exhaust Manifold Co. | Dang B.-T.,Xixia Intake and Exhaust Manifold Co. | Bai G.-Y.,Shenyang Honbase Machinery Co.
Zhuzao/Foundry | Year: 2010

Two different kinds of inoculant alloy were used to spheroidize GHMoRct (QTRSi4Mo1) ductile iron, and the reasonable furnace charge as well as metal-stream inoculation with long-acting compound inoculant were employed. By means of equilibrium solidification technology, appropriate CE was obtained, and so the microscopic porosity can be eliminated by self-feeding effect produced by graphitizing expansion. Finally the qualified products, whose matrix structure and mechanical properties meet the specification, were gained. Source


Zhao X.-W.,Xixia Intake and Exhaust Manifold Co. | Yang M.,Xixia Intake and Exhaust Manifold Co. | Wang Q.,Xixia Intake and Exhaust Manifold Co. | Wei W.,Xixia Intake and Exhaust Manifold Co.
Zhuzao/Foundry | Year: 2011

The exhaust manifold casting has many isolated hot-spots and it is impossible to set risers on it. To solve this problem, the Huazhu CAE software is applied to predict the position of shrinkage and dispersed shrinkage, and the proportional solidification technology is used to design the gating and feeding system. The riser neck must be 'wide, thin, short and declining', which is the key technology to take full advantage of self-feeding by graphite self-expansion. After optimization of process parameters, the shrinkage defects of manifold were effectively eliminated, thereby the process yield was increased significantly and a significant economic benefit was obtained. Source

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