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Alloy gray cast iron piston ring as well as manufacturing method and special template thereof

A manufacturing method and technology of piston rings, applied to piston rings, mechanical equipment, engine components, etc., can solve problems such as complex processes, achieve the effects of improving cavity strength, saving engine oil, and improving labor efficiency

Inactive Publication Date: 2013-09-04
石家庄金刚内燃机零部件集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the material of the piston ring is generally alloy cast iron with high elastic modulus and bending strength, which generally needs to be quenched and tempered to obtain it, and the process is relatively complicated

Method used

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  • Alloy gray cast iron piston ring as well as manufacturing method and special template thereof
  • Alloy gray cast iron piston ring as well as manufacturing method and special template thereof
  • Alloy gray cast iron piston ring as well as manufacturing method and special template thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The material of the present embodiment alloy gray cast iron piston ring is selected suitable C, Si, Mn, P, Cr, Mo, Cu, Ni, the weight percent content of components such as S, and the specific content of each composition is referring to Table 2, and balance is For Fe.

[0026] The manufacture method of alloy gray cast iron piston ring of the present embodiment comprises the following steps:

[0027] a. Molding: The molding sand is a mixture of quartz sand and bentonite. The ratio of the two is shown in Table 1. When the quartz sand is old sand, the volume percentage of bentonite is 1-3%. When the quartz sand is new sand, the bentonite volume The percentage content is 15-20%. When the quartz sand is a mixture of old sand and new sand, the volume percentage of bentonite increases by 1.5-2% for every 10% increase in new sand. The specific requirements are: 1) SiO2 of quartz sand 2 Content ≥ 98%, particle size 75-150 mesh, refractoriness ≥ 1700°C, mud content ≤ 1%; 2) Bent...

Embodiment 2～12

[0040] See Table 2 for the weight percentage of each component in these examples, and its production method and process are the same as those in Example 1 above. The mechanical properties of the products of these examples are shown in Table 3.

[0041] The above examples and batch production tests have proved that the casting mechanical properties of the alloy gray cast iron piston ring manufactured by the new material and the new production process have been greatly improved, and the cast blank has reached The performance requirements that originally required quenching and tempering treatment to be realized. Not only the processing flow is shortened, the labor efficiency is improved, but also the manufacturing cost is reduced. For example, to produce piston rings made of other materials that require quenching and tempering treatment, 100,000 pieces of FZ9842 for each quenching and tempering treatment requires about 14,330 kilowatt-hours of electricity, and the electricity co...

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Abstract

The invention discloses an alloy gray cast iron piston ring and a manufacturing method and a special template thereof. The material of the piston ring comprises the following elements in percentage by weight: 3.2-3.5% of C, 2.3-2.6% of Si, 0.70-0.9% of Mn, 0.1-0.30% of P, 0.1-0.3% of Cr, 0.4-0.5% of Mo, 0.6-1.0% of Cu, 0.3-0.5% of Ni, not more than 0.1% of S and the balance of Fe. The piston ring is manufactured by the steps of: shaping, smelting, incubating, taking out and casting. The template adopted by the shaping process comprises a bottom plate, a lateral runner and a straight runner arranged at the middle position of the lateral runner, wherein first mold rings are symmetrically arranged at each of two ends of the lateral runner; first internal runners for communicating the first mold rings with the lateral runner are vertical to the lateral runner; and second mold rings are respectively arranged between two first mold rings at each of two sides of the straight runner. According to the invention, the casting capability of the piston ring is increased, the piston ring with higher elastic modulus can be obtained without quenching and tempering treatment, the requirement of an engine on high specific pressure of the piston ring is satisfied and the engine emission is reduced.

Description

technical field [0001] The invention relates to an alloy gray cast iron piston ring, in particular to an alloy gray cast iron piston ring using a new material and a manufacturing method thereof, which is applied to an internal combustion engine. Background technique [0002] The internal combustion engine is a kind of power machinery, which is a heat engine that directly converts the heat energy released into power by burning fuel inside the machine. The internal combustion engine is a mechanical device with a wide range of uses, among which the piston ring is one of the most critical components in the internal combustion engine. It has three major functions in the diesel engine. It seals the combustion chamber and the crankcase and transfers the heat energy on the piston to the on the cylinder wall and control its fuel consumption. The working conditions of the piston ring are quite harsh, not only to bear the action of high temperature and high pressure, but also to bear ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C33/08B22D3/00F02F5/00
Inventor 刘津东王焕平张彩霞贾改丽
Owner 石家庄金刚内燃机零部件集团有限公司
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