High-strength and high-thermal conductivity material solid-liquid composite brake drum and preparation method thereof

A solid-liquid compound, high thermal conductivity technology, applied in the field of auto parts, can solve the problem that the service life of the composite brake drum has not been significantly extended, and achieve good economic and social benefits, improve wear resistance, and good thermal conductivity.

Active Publication Date: 2022-06-24
山西汤荣机械制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, none of the above inventions can achieve a good metallurgical combination of high-strength and high-toughness ductile iron in the outer layer and gray cast iron with high thermal conductivity in the inner layer, resulting in no significant extension of the service life of the composite brake drum.

Method used

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  • High-strength and high-thermal conductivity material solid-liquid composite brake drum and preparation method thereof
  • High-strength and high-thermal conductivity material solid-liquid composite brake drum and preparation method thereof
  • High-strength and high-thermal conductivity material solid-liquid composite brake drum and preparation method thereof

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Effect test

Embodiment 1

[0034] A high-strength and high-thermal-conductivity new material solid-liquid composite brake drum and a preparation method thereof are composed of an outer layer of high-strength ductile iron 1 and an inner layer of high-heat-conductivity gray cast iron 2, which are cast into one body through centrifugal solid-liquid composite casting. The specific preparation process steps are as follows:

[0035] ①Smelting ductile iron 1 and gray cast iron 2 in an intermediate frequency induction furnace respectively; first smelting ductile iron 1, heating and melting scrap steel, recarburizer, returning material and ferrosilicon, and controlling the chemical composition and mass fraction of molten iron to 3.51% C, 3.11% Si, 0.55% Mn, 0.0003% RE, 0.032% S, 0.037% P, the balance is Fe and inevitable impurities; when the molten iron temperature reaches 1527 °C, the molten iron is released to the spheroidizing ladle;

[0036] ②After all the molten iron enters the spheroidizing ladle, use a top...

Embodiment 2

[0042] A high-strength and high-thermal-conductivity new material solid-liquid composite brake drum and a preparation method thereof are composed of an outer layer of high-strength ductile iron 1 and an inner layer of high-heat-conductivity gray cast iron 2, which are cast into one body through centrifugal solid-liquid composite casting. The specific preparation process steps are as follows:

[0043] ①Smelting ductile iron 1 and gray cast iron 2 with an intermediate frequency induction furnace respectively; first smelting ductile iron 1, heating and melting scrap steel, recarburizer, returning material and ferrosilicon, and controlling the chemical composition and mass fraction of molten iron to 3.88% C, 2.34% Si, 0.67% Mn, 0.0004% RE, 0.031% S, 0.037% P, the balance is Fe and unavoidable impurities; when the molten iron temperature reaches 1544 ℃, the molten iron is released to the spheroidizing ladle;

[0044] ②After all the molten iron enters the spheroidizing ladle, use a t...

Embodiment 3

[0050] A high-strength and high-thermal-conductivity new material solid-liquid composite brake drum and a preparation method thereof are composed of an outer layer of high-strength ductile iron 1 and an inner layer of high-heat-conductivity gray cast iron 2, which are cast into one body through centrifugal solid-liquid composite casting. The specific preparation process steps are as follows:

[0051] ①Smelting ductile iron 1 and gray cast iron 2 with an intermediate frequency induction furnace respectively; first smelting ductile iron 1, heating and melting scrap steel, recarburizer, return material and ferrosilicon, and controlling the chemical composition and mass fraction of molten iron to 3.64% C, 2.88% Si, 0.39% Mn, 0.0037% RE, 0.031% S, 0.036% P, the balance is Fe and inevitable impurities; when the molten iron temperature reaches 1534 °C, the molten iron is released to the spheroidizing ladle;

[0052] ②After all the molten iron enters the spheroidizing ladle, use a top-...

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Abstract

The invention relates to a high-strength and high-thermal conductivity new material solid-liquid composite brake drum and a preparation method thereof, belonging to the technical field of auto parts. The composite brake drum is made of high-strength nodular iron in the outer layer and gray cast iron with high thermal conductivity in the inner layer, which are cast into one body through centrifugal solid-liquid composite casting. Firstly, the outer layer of the composite brake drum is poured on the iron particle-filled coated sand shell production line, and the iron particle-filled coated sand shell is used to solidify and cool quickly. High strength and high toughness, on this basis, under the conditions of centrifugal casting, the gray cast iron of the inner layer is poured, and by controlling the centrifugal casting forming process, good metallurgical bonding of the inner and outer layers is achieved, and the distribution of graphite is significantly improved, so that the composite system of the present invention The dynamic drum has the characteristics of high strength and high thermal conductivity. The service life of the composite brake drum of the invention is more than three times higher than that of the common bimetallic composite brake drum, and the popularization and application has good economic and social benefits.

Description

technical field [0001] The invention discloses a solid-liquid composite brake drum and a preparation method thereof, particularly relates to a new material solid-liquid composite brake drum with high strength and high thermal conductivity and a preparation method thereof, and belongs to the technical field of auto parts. Background technique [0002] With the progress of my country's automobile technology and the improvement of automobile running speed, higher requirements are also put forward for the braking performance of automobiles and the performance of the parts of the corresponding braking system. The brake drum is a key component in the car braking system, and its performance directly affects the braking performance and even the safety of the car. When the car brakes, the brake pads exert radial pressure on the inner surface of the brake drum to generate circumferential tension. At the same time, due to the dynamic or static friction force generated between the brak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/12C22C37/04C22C37/06C22C37/10B22D13/00B22D19/16
Inventor 曹全青马胜强靳宏斌王晓妍刘海洋符寒光
Owner 山西汤荣机械制造股份有限公司
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