Rapid preparation method of truck vermicular graphite cast iron brake disc

A technology of vermicular graphite cast iron and brake disc, applied in the field of preparation of truck brake disc, can solve the problems of difficult grinding, high production cost, easy entry of impurities, etc., and achieves the effects of good electromagnetic stirring effect, shortening the life of the crucible, and convenient starting operation.

Active Publication Date: 2020-05-12
山东时风(集团)有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Use an electric furnace to heat and melt the liquid, transfer it to the vermicomposted ladle for vermicomposting, then pour the molten iron into the small ladle and add the flow inoculant at the same time, and finally pour it. After the sand box is formed, it takes a long time Waiting for the molten iron to be ready before pouring, the whole process takes a long time, the efficiency is not high, and the energy consumption is relatively high
[0007] 2. As we all know, the quality of the casting model is not considered in the whole process, the surface of the brake disc of the casting truck is not smooth, and the engine block made of

Method used

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  • Rapid preparation method of truck vermicular graphite cast iron brake disc
  • Rapid preparation method of truck vermicular graphite cast iron brake disc
  • Rapid preparation method of truck vermicular graphite cast iron brake disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1. A rapid preparation method of compacted graphite cast iron truck brake disc is characterized in that it comprises the following steps:

[0052] Step 1: Prepare 30kg of steel scrap and 50kg of recycled material for every 100kg of pig iron according to the weight ratio, and put part of the pig iron, all of the scrap steel, and all of the recycled material into a low-frequency induction furnace for melting.

[0053] Step 2: Add carburant, control the amount of carburant added, so that the carbon content of the solution is: 3.75%; wherein the carbon equivalent needs to be kept at 4.35%, and the carbon equivalent=mass percentage of carbon+(mass percentage of silicon / 3); Feed argon gas, add nickel plate, the addition of nickel plate is 0.05% of the total weight of the solution; after the nickel plate is melted, remove slag and set aside.

[0054] Step 3: Lay a layer of ferrosilicon on the bottom of the intermediate frequency induction furnace to form a ferrosilic...

Embodiment 2

[0068] Example 2. A rapid preparation method of compacted graphite cast iron truck brake disc is characterized in that it comprises the following steps:

[0069] Step 1: Prepare 25kg of steel scrap and 40kg of recycled materials for every 100kg of pig iron according to the weight ratio, and put part of the pig iron, all of the scrap steel, and all of the recycled materials into a low-frequency induction furnace for melting.

[0070] Step 2: add carburant, control the amount of carburant added, so that the carbon content of the solution is: 3.7%; wherein the carbon equivalent needs to be kept at 4.2%, and the carbon equivalent=mass percentage of carbon+(mass percentage of silicon / 3); Pass into argon, add nickel plate, the addition of nickel plate is 0.06% of solution gross weight; After nickel plate is melted, remove slag, standby.

[0071] Step 3: Lay a layer of ferrosilicon on the bottom of the intermediate frequency induction furnace to form a ferrosilicon layer, then add ...

Embodiment 3

[0085] Example 3. A rapid preparation method of compacted graphite cast iron truck brake disc is characterized in that it comprises the following steps:

[0086] Step 1: Prepare 25kg of steel scrap and 40kg of recycled materials for every 100kg of pig iron according to the weight ratio, and put part of the pig iron, all of the scrap steel, and all of the recycled materials into a low-frequency induction furnace for melting.

[0087] Step 2: Add carburant, control the amount of carburant added, so that the carbon content of the solution is: 3.6%; wherein the carbon equivalent needs to be kept at 4.07%, and the carbon equivalent=mass percentage of carbon+(mass percentage of silicon / 3); Pass into argon, add nickel plate, the add-on of nickel plate is 0.07% of solution gross weight; After nickel plate is melted, remove slag, standby.

[0088] Step 3: Lay a layer of ferrosilicon on the bottom of the intermediate frequency induction furnace to form a ferrosilicon layer, then add t...

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Abstract

The invention discloses a rapid preparation method of a truck vermicular graphite cast iron brake disc. The method comprises the following steps of preparing materials, adding part of pig iron, all scrap steel and all foundry returns into a low-frequency induction furnace for melting, and adding a carburant and a nickel plate; laying a layer of silicon iron on the bottom of a medium-frequency induction furnace to form a silicon iron layer, adding the rest pig iron to form a pig iron layer, heating, and adding electrolytic copper, ferromanganese and ferrochromium before the added silicon iron and pig iron are not completely molten; adding a solution in the low-frequency induction furnace into the medium-frequency induction furnace, wherein the solution in the medium-frequency induction furnace is vermicularized in the vermicularizing casting ladle, and a vermiculizer is a mixture of rare earth silicon-magnesium alloy, a composite material with added calcium element, aluminum wires cut into sections, silicon-barium powder and tin powder; and pouring. The method has the advantages of being high in brake disc production speed, good in brake disc quality and low in cost.

Description

technical field [0001] The invention relates to a preparation method of truck brake discs, in particular to a rapid preparation method of vermicular graphite cast iron truck brake discs. Background technique [0002] At present, the materials of truck brake discs produced at home and abroad mainly include ordinary gray cast iron and alloy gray castings. Gray cast iron has a certain hardness, but the physical and mechanical properties, mechanical strength, low temperature resistance and thermal fatigue resistance of gray cast iron brake discs are not satisfactory in the practical process of automobiles, and thermal cracks and rapid wear are prone to occur during use. phenomenon, resulting in certain security risks. [0003] Graphite forms in cast iron are flake, worm and spherical. Vermicular graphite is an intermediate form of graphite between flake graphite and spherical graphite. When observed under an optical microscope, most of the short pieces of graphite are discont...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08C22C33/10B22D1/00B22C9/02B22C1/00
CPCB22C1/00B22C9/02B22D1/00C22C33/10C22C37/08C22C37/10
Inventor 刘成强于子岭纪昌勇徐海港张中凯林堂国许爱国李汝学刘兴明
Owner 山东时风(集团)有限责任公司
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