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High-abrasion-resistant engine flywheel and preparation method thereof

An engine, high wear-resistant technology, applied in the field of auto parts, can solve the problems of low flywheel strength, no wear resistance, loose internal organization, etc.

Inactive Publication Date: 2017-10-20
WUHU CHENGTUO AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, flywheels are generally made of cast iron. Cast iron flywheels generally have defects such as low strength and non-wear resistance because of the many impurities in the material, the material is brittle, the strength is poor, the internal stress is large, and the internal structure is loose and cracks are easy to occur.

Method used

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  • High-abrasion-resistant engine flywheel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First mix ductile iron, silicon carbide particles, graphite fibers, manganese, nickel, molybdenum, ceria, and vanadium pentoxide in a weight ratio of 100:0.3:1.0:0.6:0.1:0.3:0.05:0.1 and then heat at 1550°C Melting for 1 hour; then adding inoculant (the weight ratio of inoculant to ductile iron is 0.45:100) and refining at 1450°C for 50 minutes to obtain molten iron; followed by casting the molten iron to obtain a parison; finally the parison (temperature is 950°C) first at 900°C for 3 hours, then cooling down to 500°C at a rate of 10°C / min for 4 hours, and then directly water cooling after heat preservation to obtain the high wear-resistant engine flywheel A1;

[0022] Among them, the preparation process of the inoculant is as follows: silicon barium, magnesium oxide, titanium oxide, manganese oxide and calcium oxide are crushed and mixed according to the weight ratio of 1:0.2:0.25:0.1:0.05, and then calcined at 450°C for 2 hours The inoculant is obtained after natural...

Embodiment 2

[0024] First mix ductile iron, silicon carbide particles, graphite fibers, manganese, nickel, molybdenum, ceria, and vanadium pentoxide in a weight ratio of 100:0.5:1.5:1.5:0.5:0.6:0.1:0.25, and then heat at 1600°C Melting for 2 hours; then adding inoculant (the weight ratio of inoculant to ductile iron: 0.55:100) and refining at 1550°C for 60 minutes to obtain molten iron; followed by casting the molten iron to obtain a parison; finally the parison (temperature 970°C) firstly at 950°C for 5 hours, then lower the temperature to 550°C at a rate of 10°C / min and hold for 5 hours, and then directly water-cool after the heat preservation to obtain the high wear-resistant engine flywheel A2;

[0025] Among them, the preparation process of the inoculant is as follows: silicon barium, magnesium oxide, titanium oxide, manganese oxide and calcium oxide are crushed and mixed according to the weight ratio of 1:0.4:0.45:0.3:0.1, and then calcined at 600°C for 3h The inoculant is obtained a...

Embodiment 3

[0027] First mix ductile iron, silicon carbide particles, graphite fibers, manganese, nickel, molybdenum, ceria, and vanadium pentoxide in a weight ratio of 100:0.4:1.3:1.2:0.3:0.4:0.08:0.2 and then heat at 1550°C Melting for 1.5 hours; then adding inoculant (the weight ratio of inoculant to ductile iron is 0.45:100) and refining at 1500°C for 55 minutes to obtain molten iron; followed by casting the molten iron to obtain a parison; finally the parison (temperature 960°C) firstly at 930°C for 4 hours, then lower the temperature to 550°C at a rate of 10°C / min for 5 hours, and then directly water-cool after the heat preservation, to obtain the high wear-resistant engine flywheel A3;

[0028] Among them, the preparation process of the inoculant is as follows: silicon barium, magnesium oxide, titanium oxide, manganese oxide and calcium oxide are crushed and mixed according to the weight ratio of 1:0.3:0.35:0.2:0.08, and then calcined at 500°C for 2h The inoculant is obtained after...

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Abstract

The invention discloses a high-abrasion-resistant engine flywheel and a preparation method thereof. The preparation method comprises the steps that spheroidal graphite cast iron, silicon carbide particles, graphite fiber, manganese, nickel, molybdenum, ceria and vanadium pentoxide are mixed at first and then are smelted; then refining is conducted to obtain molten iron, later, the molten iron is subjected to casting molding, and a profile blank is obtained; and the profile blank is subjected to heat treatment finally, so that the high-abrasion-resistant engine flywheel is obtained, wherein, relative to the 100 parts by weight of spheroidal graphite cast iron, the silicon carbide is 0.3-0.5 part by weight, the graphite fiber is 1.0-1.5 part by weight, the manganese is 0.6-1.5 part by weight, the nickel is 0.1-0.5 part by weight, the molybdenum is 0.3-0.6 part by weight, the ceria is 0.05-0.1 part by weight, and the vanadium pentoxide is 0.1-0.25 part by weight. The high-abrasion-resistant engine flywheel is simple in preparation process and low in cost and has the advantages of being high in strength, large in elongation rate, good in abrasion resistance, and the like.

Description

technical field [0001] The invention relates to the field of auto parts, in particular to a highly wear-resistant engine flywheel and a preparation method thereof. Background technique [0002] The flywheel is a disc-shaped component installed at the output end of the engine, and has a large moment of inertia. Its main function is to store a part of the function of the crankshaft input during the work process, so as to overcome resistance in other strokes and drive the crankshaft. The rod mechanism crosses the upper and lower dead centers to ensure that the selected angular velocity and output torque of the crankshaft are as uniform as possible, and make it possible for the engine to overcome a period of overload. [0003] However, flywheels are generally made of cast iron. Cast iron flywheels generally have defects such as low strength and non-wear resistance because of the many impurities in the material, the material is brittle, the strength is poor, the internal stress i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/08C22C49/14C22C101/10
CPCC22C47/08C22C49/14
Inventor 宁世庆汪峰
Owner WUHU CHENGTUO AUTO PARTS