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A casting process of wear-resistant vermicular graphite iron castings for bk series brake housings

A casting process and brake technology, applied in metal material coating process, solid-state diffusion coating, coating, etc., can solve the problems of affecting the service life of the brake and poor wear resistance, and achieve good fatigue resistance and wear resistance , good processing effect

Active Publication Date: 2020-05-22
ANHUI DATIAN CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The actual use process shows that the wear resistance of the brake body produced by the gray cast iron produced by the vermicular graphite cast iron is poor
Due to the serious wear and tear of the brake body shell under long-term use, if its wear resistance is poor, it will seriously affect the service life of the brake and bring greater trouble to the user.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A casting process of wear-resistant vermicular graphite iron castings for BK series brake housings, comprising the following steps:

[0027] (1) Add raw materials such as Q10 pig iron, spring steel, electrolytic manganese and vermicular iron into the melting furnace, and heat up to 1540-1560°C for smelting, remove impurities after smelting for 50-60min, and take samples for the chemical properties of the alloy Conduct spectral analysis on the ingredients, analyze and detect the content of each ingredient, add ferromanganese, iron tin, graphitized recarburizer and 90 silicon carbide according to the test results, and continue mixing for 10-20 minutes to obtain molten iron for later use;

[0028] (2) Cover a layer of vermative agent on the bottom of the molten iron ladle, and cover it with a layer of silicon-barium-calcium inoculant, keep the temperature of the molten iron at 1530-1540°C, and then add the molten iron in the above step (1) for vermicularization Inoculation...

Embodiment 2

[0034] A casting process of wear-resistant vermicular graphite iron castings for BK series brake housings, comprising the following steps:

[0035] (1) Add raw materials such as Q10 pig iron, spring steel, electrolytic manganese and vermicular iron into the melting furnace, and heat up to 1540-1560°C for smelting, remove impurities after smelting for 50-60min, and take samples for the chemical properties of the alloy Conduct spectral analysis on the ingredients, analyze and detect the content of each ingredient, add ferromanganese, iron tin, graphitized recarburizer and 90 silicon carbide according to the test results, and continue mixing for 10-20 minutes to obtain molten iron for later use;

[0036](2) Cover a layer of vermative agent on the bottom of the molten iron ladle, and cover it with a layer of silicon-barium-calcium inoculant, keep the temperature of the molten iron at 1530-1540°C, and then add the molten iron in the above step (1) for vermicularization Inoculation ...

Embodiment 3

[0042] A casting process of wear-resistant vermicular graphite iron castings for BK series brake housings, comprising the following steps:

[0043] (1) Add raw materials such as Q10 pig iron, spring steel, electrolytic manganese and vermicular iron into the melting furnace, and heat up to 1540-1560°C for smelting, remove impurities after smelting for 50-60min, and take samples for the chemical properties of the alloy Conduct spectral analysis on the ingredients, analyze and detect the content of each ingredient, add ferromanganese, iron tin, graphitized recarburizer and 90 silicon carbide according to the test results, and continue mixing for 10-20 minutes to obtain molten iron for later use;

[0044] (2) Cover a layer of vermative agent on the bottom of the molten iron ladle, and cover it with a layer of silicon-barium-calcium inoculant, keep the temperature of the molten iron at 1530-1540°C, and then add the molten iron in the above step (1) for vermicularization Inoculation...

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PUM

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Abstract

The invention provides a casting process of BK series brake body shell abrasion-resistant vermicular graphite iron castings and relates to the technical field of production of iron castings. The casting process includes the following steps of raw material smelting, raw material impurity removing, component analyzing, component supplementing, vermicularizing inoculation, molten iron slag removing,casting molding, cooling molding, calcination treatment, shakeout treatment and carbonitriding. According to the casting process, various chemical components are added in molten iron raw materials, sothat the made iron castings are high in strength and toughness; besides, due to the manner of carbonitriding, carbon and nitrogen are added in the surfaces of the iron castings; and due to accurate control over the pressure intensity, temperature and speed, the made iron castings are good in surface abrasion resistance and anti-fatigue performance.

Description

technical field [0001] The invention relates to the technical field of cast iron production, in particular to a casting process of wear-resistant vermicular graphite cast iron for BK series brake housings. Background technique [0002] A brake is a device that has the functions of slowing down, stopping or maintaining a stopped state of moving parts, and is a mechanical part that stops or slows down moving parts in machinery. Commonly known as brakes, brakes. At present, the brake housings are all made of gray cast iron. [0003] The mechanical properties of compacted graphite cast iron are between gray cast iron and nodular cast iron. The section sensitivity of compacted graphite cast iron is much smaller than that of ordinary gray cast iron, so the mechanical properties of its thick and large sections are still relatively uniform. The outstanding advantage of compacted graphite cast iron is that the yield ratio is the highest among cast alloys, and its thermal conductivi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/12C22C37/10C23C8/32
CPCC22C33/12C22C37/10C23C8/32
Inventor 吴元立张祥徐祥俊
Owner ANHUI DATIAN CASTING
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