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Alloy gray cast iron material for automobile brake disc, automobile brake disc and preparation method thereof

A technology of automobile braking and gray cast iron, which is applied in the field of alloy steel materials, can solve the problems that brake discs cannot meet the requirements of high-performance automobiles, achieve good thermal conductivity and wear resistance, and improve the effect of graphite morphology

Inactive Publication Date: 2017-11-14
TONGFU HEAT TREATMENT KUNSHAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of material improves how well heated car parts work when they are being used for their purpose. It also makes it easier to manufacture these materials while maintaining its quality level.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the durability and lifespan (service) capacity of automobiles' brake disks while maintaining good impact absorption characteristics such as low weight per unit volume, lightweight design features, and improved surface finish qualities like bright chrome grey castings without adding alloys containing chromium instead of nickels.

Method used

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  • Alloy gray cast iron material for automobile brake disc, automobile brake disc and preparation method thereof
  • Alloy gray cast iron material for automobile brake disc, automobile brake disc and preparation method thereof
  • Alloy gray cast iron material for automobile brake disc, automobile brake disc and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Due to the high carbon and phosphorus content of the existing brake discs, there are coarse C-type graphite and more phosphorus eutectic in the metallographic structure, resulting in its performance is far from reaching the requirements, so alloying design is required. The alloying elements often added to gray cast iron are chromium, vanadium, molybdenum, niobium, copper and so on. Chromium is a carbide forming element, 85% of which is dissolved in austenite during the solidification of molten iron, promotes the occurrence of metastable eutectic reaction, refines pearlite, and improves the strength of gray cast iron. Vanadium promotes the formation and refinement of pearlite and improves the strength and hardness of gray cast iron. After the casting is graphitized and annealed at high temperature, dispersed fine particulate precipitates will appear in the ferrite, and the strength and hardness will increase instead. . Molybdenum reduces the eutectic transition temperatu...

Embodiment 2

[0049] The weight percentages of the alloy gray cast iron materials are as follows: C content is 3.5% to 3.6%, Mn content is 0.5% to 0.6%, Cr content is 0.25%, Cu content is 0.7%, Nb content is 0.5%, and Si content is 1.8%, P content is ≤0.2%, S content is ≤0.12%, and the rest is iron.

Embodiment 3

[0051] The weight percentages of the alloy gray cast iron materials are as follows: C content is 3.5% to 3.6%, Mn content is 0.5% to 0.6%, Cr content is 0.35%, Cu content is 0.6%, Nb content is 0.5%, and Si content is 1.8%, P content is ≤0.2%, S content is ≤0.12%, and the rest is iron.

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Abstract

The invention discloses an alloy gray cast iron material for an automobile brake disc, the automobile brake disc and a preparation method thereof. The alloy gray cast iron material comprises, by mass, 3.5%-3.6% of C, 0.5%-0.6% of Mn, 0.25%-0.35% of Cr, 0.6%-0.8% of Cu, 0.4%-0.5% of Nb, 1.8%-2.0% of Si, less than or equal to 2% of P, less than or equal to 0.12% of S and the balance iron. According to the alloy gray cast iron material for the automobile brake disc, the automobile brake disc and the preparation method thereof, a graphite morphology of a high-carbon equivalent brake disc can be improved by adding the alloy element, and the graphite morphology can be refined, so that the brake disc has good comprehensive performances such as heat conductivity, wear resistance and the like, and therefore the high-standard brake disc meets the requirement of a high-performance automobile, and the problem that an existing automobile brake disc cannot meet the requirement of a high-performance automobile is solved.

Description

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Claims

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Application Information

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Owner TONGFU HEAT TREATMENT KUNSHAN
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