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Production method capable of eliminating shrinkage cavities and shrinkage porosity for light calliper body castings

A production method, the technology of the caliper body, which is applied in the field of parts casting production, can solve the problems such as shrinkage cavity and shrinkage porosity of the light-duty caliper body that cannot be solved

Active Publication Date: 2017-08-18
黄石东贝铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The principle of this scheme is similar to the publication number CN 102794446 A. With this scheme, the shrinkage cavity and porosity of the light-duty caliper body cannot be solved after many tests by changing the gate to a flat shape.

Method used

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  • Production method capable of eliminating shrinkage cavities and shrinkage porosity for light calliper body castings
  • Production method capable of eliminating shrinkage cavities and shrinkage porosity for light calliper body castings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A production method of a light-duty caliper body casting capable of eliminating shrinkage cavities and shrinkage porosity in this embodiment is to add 2800kg of high-quality carbon steel and 100kg of graphitized recarburizer to the electric furnace for melting, and add 4200kg of nodular cast iron back charge during the melting process , when the temperature in the electric furnace is 1500°C, adjust the molten iron composition in the electric furnace to be: C 3.85%, Si 2.06%, Mn 0.25%, S0.012%, P 0.011%, Fe 93.817%. Adopt strong inoculant for secondary inoculation, automatically feed silk and start pouring caliper body castings after spheroidization. The pouring time of each type is 6.0-7.0s, and the pouring time of each ladle of molten iron is controlled within 8 minutes. The poured castings are transported to the shakeout drum Sand falling, and then use hydraulic separation pliers to separate the castings. After the castings are shot blasted by the shot blasting machine...

Embodiment 2

[0017] A production method of a light-duty caliper body casting capable of eliminating shrinkage cavities and shrinkage porosity in this embodiment is to add 2450kg of high-quality carbon steel and 91kg of graphitized recarburizer to the electric furnace for melting, and add 3850kg of nodular cast iron back charge during the melting process , when the temperature in the electric furnace is 1500°C, adjust the molten iron composition in the electric furnace to be: C 3.70%, Si 2.10%, Mn 0.20%, S0.02%, P 0.015%, Fe 93.965%. Adopt strong inoculant for secondary inoculation, automatically feed silk and start pouring caliper body castings after spheroidization. The pouring time of each type is 6.0-7.0s, and the pouring time of each ladle of molten iron is controlled within 8 minutes. The poured castings are transported to the shakeout drum Sand falling, and then use hydraulic separation pliers to separate the castings. After the castings are shot blasted by the shot blasting machine, ...

Embodiment 3

[0020] A production method of a light-duty caliper body casting capable of eliminating shrinkage cavities and porosity in this embodiment, adding 3150kg of high-quality carbon steel and 105kg of graphitized recarburizer to the electric furnace for melting, and adding 4550kg of nodular cast iron back charge during the melting process , when the temperature in the electric furnace is 1500°C, adjust the molten iron composition in the electric furnace to be: C 3.90%, Si 1.90%, Mn 0.40%, S0.014%, P 0.02%, Fe 93.766%. Adopt strong inoculant for secondary inoculation, automatically feed silk and start pouring caliper body castings after spheroidization. The pouring time of each type is 6.0-7.0s, and the pouring time of each ladle of molten iron is controlled within 8 minutes. The poured castings are transported to the shakeout drum Sand falling, and then use hydraulic separation pliers to separate the castings. After the castings are shot blasted by the shot blasting machine, the cali...

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Abstract

The invention discloses a production method capable of eliminating shrinkage cavities and shrinkage porosity for light calliper body castings. An adjusting iron solution is prepared from, by mass, 3.7%-3.9% of C, 1.9%-2.1% of Si, 0.2%-0.4% of Mn, smaller than or equal to 0.02% of S, smaller than or equal to 0.02% of P and the balance Fe. According to the production method, the carbon content in molten iron is increased by adding a graphitized carburant, and the silicon content in the molten iron is decreased by decreasing the addition amount of silicon iron; a strong inoculant is adopted for secondary inoculation, fast pouring is conducted for avoiding inoculation fade, carbon and high silicon in the molten iron are low, the content of phosphorus is also controlled to be low, good fluidity of the molten iron is guaranteed, castability is good, molten iron expansion is small, the strong inoculant promotes graphitization, automatic shrinkage compensation performance is good, the overall shrinkage compensation effect is good, and the weight of the calliper body castings is decreased; and meanwhile, hot-spot portions of the casting can be prevented from being subjected to shrinkage cavities and shrinkage cavity, the rejection rate of the castings is decreased, and the production cost of the castings is reduced.

Description

technical field [0001] The invention relates to the technical field of component casting production, in particular to a production method of a lightweight caliper body casting capable of eliminating shrinkage cavities and shrinkage porosity. Background technique [0002] In order to reduce fuel consumption and reduce carbon dioxide emissions, the lightweight of automobiles has become one of the focuses of public attention. Studies have shown that for every 100kg reduction in the weight of the vehicle, the fuel consumption per 100 kilometers can be reduced by 0.3-0.6L. In addition, the lightweight of the car can also improve the power of the car, save materials and reduce costs. [0003] There are many ways to reduce the weight of automobiles, among which reducing the weight of castings on automobiles by improving the structure and adopting new technologies is one of the important methods. The brake caliper (caliper body) is one of the main parts of the automobile hydraulic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/08C22C37/10C21C1/08C21C7/00B22C9/02
CPCB22C9/02C21C1/08C21C7/0025C22C33/08C22C37/10
Inventor 樊立刘睦坤袁海喜欧阳晋
Owner 黄石东贝铸造有限公司
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