Method for casting bimetallic brake drum in short process

A brake drum and bimetallic technology, applied in the direction of brake drums, etc., can solve the problems of environmental pollution, waste of zinc resources, serious volatilization of zinc elements, etc., and achieve the effects of short production cycle, low production cost, and good economic and social benefits

Active Publication Date: 2022-04-01
山西汤荣机械制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using waste car shells (also known as waste car plates) directly as raw materials for steelmaking will seriously volatilize zinc, pollute the environment, and cause a huge waste of zinc resources

Method used

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  • Method for casting bimetallic brake drum in short process
  • Method for casting bimetallic brake drum in short process
  • Method for casting bimetallic brake drum in short process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for casting a bimetal brake drum in a short process, which is characterized in that the outer layer is made of continuous casting steel plate mainly smelted by scrapped car shells, the inner layer is made of high-strength wear-resistant gray cast iron, and the two are compounded by centrifugal Casting into a metallurgical bond, the specific process steps are as follows:

[0035] ① First use a scrap car shredder to roughly shred the scrap car shell, and then use a scrap baler to pack the roughly shredded car shell into steel blocks with a size of 150-250mm×150-250mm×150-250mm;

[0036] ②Use the steel block and Q235 scrap in step ① (the chemical composition and mass fraction of the Q235 scrap are 0.17%C, 0.54%Mn, 0.23%Si, 0.041%S, 0.039%P, and the balance is Fe and unavoidable impurities), high carbon ferrochromium (the chemical composition and mass fraction of the high carbon ferrochromium are 62.70% Cr, 8.26% C, 2.39% Si, and the balance is Fe) and ferromangane...

Embodiment 2

[0042] A method for casting a bimetal brake drum in a short process, which is characterized in that the outer layer is made of continuous casting steel plate mainly smelted by scrapped car shells, the inner layer is made of high-strength wear-resistant gray cast iron, and the two are compounded by centrifugal Casting into a metallurgical bond, the specific process steps are as follows:

[0043] ① First use a scrap car shredder to roughly shred the scrap car shell, and then use a scrap baler to pack the roughly shredded car shell into steel blocks with a size of 150-250mm×150-250mm×150-250mm;

[0044]②Use the steel block and Q235 scrap in step ① (the chemical composition and mass fraction of the Q235 scrap are 0.14%C, 0.65%Mn, 0.21%Si, 0.031%S, 0.043%P, and the balance is Fe and unavoidable impurities), high carbon ferrochromium (the chemical composition and mass fraction of the high carbon ferrochromium are 62.77% Cr, 7.94% C, 2.63% Si, the balance is Fe) and ferromanganese ni...

Embodiment 3

[0050] A method for casting a bimetal brake drum in a short process, which is characterized in that the outer layer is made of continuous casting steel plate mainly smelted by scrapped car shells, the inner layer is made of high-strength wear-resistant gray cast iron, and the two are compounded by centrifugal Casting into a metallurgical bond, the specific process steps are as follows:

[0051] ① First use a scrap car shredder to roughly shred the scrap car shell, and then use a scrap baler to pack the roughly shredded car shell into steel blocks with a size of 150-250mm×150-250mm×150-250mm;

[0052] ②Use the steel block and Q235 scrap in step ① (the chemical composition and mass fraction of the Q235 scrap are 0.22%C, 0.30%Mn, 0.18%Si, 0.038%S, 0.044%P, and the balance is Fe and unavoidable impurities), high carbon ferrochromium (the chemical composition and mass fraction of the high carbon ferrochromium are 65.67% Cr, 8.38% C, 2.94% Si, and the balance is Fe) and ferromangane...

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Abstract

The invention discloses a short-process bimetal brake drum casting method and belongs to the technical field of casting. The outer layer of the brake drum is formed in the mode that scraped car sheet steel blocks, Q235 scrap steel, high-carbon ferrochrome and nitrided ferromanganese serve as furnace charges and are smelted and continuously cast into a steel plate in a medium-frequency induction furnace and then welded and rolled, the inner layer is made of high-strength abrasion-resistant gray cast iron, and the inner layer and the inner layer are subjected to metallurgical bonding through centrifugal composite casting. The efficient utilization of the waste automobile sheet is realized, and the element yield is high. Compared with HT250 cast iron, the bimetal brake drum inner layer cast iron cast in a short process has the advantages of being high in high-temperature tensile strength and crack initiation and expansion resistance, long in service life, safe and reliable to use and the like. Compared with an HT250 cast iron brake drum, the service life of the brake drum is prolonged by more than 2.5 times, and the brake drum has good economic and social benefits in popularization and application.

Description

technical field [0001] The invention discloses a method for casting a brake drum, in particular to a method for casting a bimetallic brake drum in a short process, and belongs to the technical field of casting. Background technique [0002] The traditional integral casting drum brake is currently widely used in trucks. The brake is mainly composed of a brake drum and a brake shoe. It uses frictional resistance to convert the kinetic energy of the vehicle's motion into heat energy, so as to decelerate or reduce the speed of the moving vehicle. Park for safety. When the car is under heavy load and driving at high speed, especially when going down long slopes or steep slopes, due to the large braking force and continuous multiple braking, the temperature of the inner wall of the brake drum rises sharply, and the temperature difference between the inside and outside increases, and the material of the brake drum increases. The high temperature mechanical properties also dropped ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22D13/04C22C21/06C22C22/00C22C27/06C22C28/00C22C30/00C22C33/06C22C37/10C22C38/02C22C38/04C22C38/06C22C38/14C22C38/16B23P15/00F16D65/10
CPCY02P10/20
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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