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Thermal fatigue-resistant casting material for heavy-duty truck engine

A technology for heavy-duty vehicles and thermal fatigue resistance, which is applied in the field of heavy-duty vehicle engine casting materials, can solve the problems of short service life, safety accidents, and frequent replacement of automobile engines, and achieve high-strength mechanical properties, prolong service life, and good wear resistance. Effect

Inactive Publication Date: 2017-02-22
马鞍山顺发机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing technology and gray iron materials have their own performance limitations, which may easily lead to short life of automobile engines, frequent replacement, and even safety accidents. Therefore, the material is developed into alloy cast iron, and further research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A thermal fatigue-resistant heavy-duty automobile engine casting material, comprising the following components by weight: 500 parts of cast iron, 80 parts of red mud, 70 parts of aluminum, 18 parts of modified aramid fiber, 12 parts of nano cobalt hydroxide, vanadium boride 6 parts, 2 parts barium strontium titanate, 1 part sodium tungstate, 2 parts cerium, 4 parts thorium, 8 parts manganese, 3 parts yttrium, 10 parts nickel;

[0017] Wherein, the red mud is dried at 420° C. for 18 minutes, and ground to a particle size of 200 nm for use.

[0018] Wherein, the modified aramid fiber is modified by a rare earth solution, and a certain amount of aramid fiber is added to a rare earth solution equivalent to 5% of its weight, and then sent into a ball mill, at a speed of 400-450 Ball mill for 30-40 minutes under the condition of rpm, take it out, and dry it by microwave.

[0019] Wherein, the rare earth solution is obtained by mixing lanthanide rare earths, ammonium nitrate ...

Embodiment 2

[0028] A thermal fatigue-resistant heavy-duty automobile engine casting material, comprising the following components by weight: 500 parts of cast iron, 90 parts of red mud, 60 parts of aluminum, 15 parts of modified aramid fiber, 15 parts of nano cobalt hydroxide, vanadium boride 5 parts, 2 parts barium strontium titanate, 2 parts sodium tungstate, 1 part cerium, 3 parts thorium, 6 parts manganese, 5 parts yttrium, 8 parts nickel;

[0029] Wherein, the red mud is dried at 450° C. for 15 minutes, and ground to a particle size of 260 nm for use.

[0030] All the same as in Example 1 except the above content.

[0031] The material in this example has been tested and found that its tensile strength is 732MPa, its elongation is 10.2%, its yield strength is 423MPa, its surface hardness is 185HBW, its toughness is 9.7J / ㎡, and its wear resistance is 22% higher than that of ordinary high manganese steel. Used in heavy-duty vehicle engines, the service life is increased by 1.5 times. ...

Embodiment 3

[0033] A thermal fatigue-resistant heavy-duty automobile engine casting material, comprising the following components by weight: 500 parts of cast iron, 100 parts of red mud, 70 parts of aluminum, 20 parts of modified aramid fiber, 8 parts of nano cobalt hydroxide, vanadium boride 4 parts, 3 parts strontium barium titanate, 2 parts sodium tungstate, 2 parts cerium, 2 parts thorium, 8 parts manganese, 3 parts yttrium, 6 parts nickel;

[0034] Wherein, the red mud is dried at 450° C. for 20 minutes, and ground to a particle size of 400 nm for use.

[0035] All the same as in Example 1 except the above content.

[0036] The material in this example has been tested and found that its tensile strength is 729MPa, its elongation is 11.2%, its yield strength is 414MPa, its surface hardness is 179HBW, its toughness is 9.6J / ㎡, and its wear resistance is 26% higher than that of ordinary high manganese steel. Used in heavy-duty vehicle engines, the service life is increased by 1.2 times....

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Abstract

The invention belongs to the technical field of automobile materials, and particularly relates to a thermal fatigue-resistant casting material for a heavy-duty truck engine. The material is composed of cast iron, red mud, aluminum, modified aramid fibers, nanometer-scale cobalt hydroxide, vanadium boride, barium strontium titanate, sodium tungstate, cerium, thorium, manganese, yttrium and nickel. Compared with the prior art, the material has the advantages that the red mud is processed for casting so as to be effectively utilized, ingredient sources of casting are expanded, corresponding ingredients and a secondary inoculation process are cooperatively adopted for production, and therefore the content of carbon and silicon can be guaranteed, casting defects such as shrinkage porosity and cavities can be avoided, the amount of cementite in as-cast finished products can be reduced, the tensile strength and the yield strength can be improved, and ferrite can be reinforced; and the wear resistance of the finished products is good, the friction coefficient is high, and the high-strength mechanical property and the high thermal fatigue resistance are realized. The material is used for casting the heavy-duty truck engine, can improve the durability of the heavy-duty truck engine and can prolong the service life of the heavy-duty truck engine.

Description

technical field [0001] The invention belongs to the technical field of automobile material mechanics, and in particular relates to a heavy-duty automobile engine casting material resistant to thermal fatigue. Background technique [0002] The automobile engine is the engine that provides power for the automobile. It is the heart of the automobile and affects the power, economy and environmental protection of the automobile. With the rapid development of my country's logistics and transportation industries, heavy-duty vehicles are moving towards high speed and high performance In order to ensure the driving safety performance requirements of heavy-duty vehicles, higher process and performance requirements are put forward for the materials and preparation processes of the engine block and cylinder head. Ordinary engines are made of gray cast iron. Gray cast iron has good fluidity, casting performance, low manufacturing cost, easy control of casting quality and its specific exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/08C22C49/14C22C47/08
CPCC22C49/08C22C47/08C22C49/14
Inventor 郭传发
Owner 马鞍山顺发机械制造有限公司
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