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Low-alloy gray cast iron material for truck brake drums and preparation method thereof

A brake drum and low-alloy technology, applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve problems such as safety accidents, performance limitations, frequent replacement, etc., to avoid shrinkage and shrinkage cavities, improve strength, and cast The effect of simple process operation

Active Publication Date: 2015-11-18
临沂新科绿色建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing technology and gray iron materials have their own performance limitations, which may easily lead to short service life of automobile brake drums, frequent replacement, and even safety accidents

Method used

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  • Low-alloy gray cast iron material for truck brake drums and preparation method thereof
  • Low-alloy gray cast iron material for truck brake drums and preparation method thereof
  • Low-alloy gray cast iron material for truck brake drums and preparation method thereof

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preparation example Construction

[0028] A kind of preparation method of low-alloy gray cast iron material for truck brake drum of the present invention, the method comprises the following steps:

[0029] (1) Molten iron smelting: prepare raw materials according to the formula quantity, add the prepared raw materials to an intermediate frequency induction furnace for heating and smelting to obtain alloy molten iron; when the temperature of alloy molten iron reaches 1480-1550°C, it is released from the furnace;

[0030] (2) Inoculation treatment: place the inoculant in the ladle, pour into the alloy molten iron, and perform gray iron inoculation treatment. The inoculation time is 30s to 120s. Stir to remove slag. After the gray iron molten iron is processed, prepare for subsequent pouring; The inoculant is preferably a silicon barium inoculant, and the added amount is 0.8-1.2% of the total mass of raw materials.

[0031] (3) Pouring process: pour the molten gray iron inoculated in step (2) into the cavity of th...

Embodiment 1

[0033] The formula composition and mass percentage are: C: 3.25%, Si: 1.59%, Mn: 0.42%, S: 0.029%, P: 0.043%, Mg: 0.035%, Cr: 0.4%, V: 0.27%, Ni: 0.31 %, Cu: 0.5%, Mo: 0.30%, Sn: 0.06%, and the balance is iron.

[0034] Preparation method: (1) Molten iron smelting: prepare raw materials according to the formula quantity, add the prepared raw materials to an intermediate frequency induction furnace for heating and smelting to obtain alloy molten iron; wait until the temperature of the molten iron reaches: 1520°C to be released from the furnace;

[0035] (2) Inoculation treatment: the inoculant is placed in the ladle, poured into the alloy molten iron, and the gray iron inoculation treatment is carried out. The inoculation time is 50s, and the slag is removed by stirring. After the molten iron is processed, the subsequent pouring is prepared; the silicon barium inoculant ( JFB2) add-on is 0.9% of raw material.

[0036] (3) Casting process: pour the gray iron molten iron inocula...

Embodiment 2

[0038] The formula composition and mass percentage are: C: 3.10%, Si: 1.55%, Mn: 0.40%, S: 0.025%, P: 0.044%, Mg: 0.03%, Cr: 0.25%, V: 0.25%, Ni: 0.25 %, Cu: 0.35%, Mo: 0.25%, Sn: 0.05%, and the balance is iron.

[0039] Preparation method: (1) Molten iron smelting: Prepare raw materials according to the formula quantity, add the prepared raw materials to an intermediate frequency induction furnace for heating and melting to obtain alloy molten iron; wait until the temperature of the molten iron reaches: 1490°C to be released from the furnace;

[0040] (2) Inoculation treatment: the inoculant is placed in the ladle, poured into the alloy molten iron, and the gray iron inoculation treatment is carried out. The inoculation time is 50s, and the slag is removed by stirring. After the molten iron is processed, the subsequent pouring is prepared; the silicon barium inoculant ( JFB2) add-on is 0.9% of raw material.

[0041] (3) Casting process: pour the gray iron molten iron inocula...

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Abstract

The invention discloses a low-alloy gray cast iron material for truck brake drums and a preparation method thereof, belonging to the technical field of gray cast iron materials. The material mainly comprises the following chemical components in percentage by mass: 3.00-3.70% of C, 1.5-2.8% of Si, 0.38-1.5% of Mn, at most 0.04% of S, at most 0.08% of P, 0.02-0.04% of Mg, 0.20-0.50% of Cr, 0.2-0.5% of V, 0.2-0.45% of Mo, 0.04-0.10% of Sn and the balance of iron. The method comprises the following steps: (1) molten iron smelting; (2) inoculation; and (3) casting. The invention aims to provide a low-alloy gray cast iron material for truck brake drums, which has the advantages of excellent resistance, excellent wear resistance and ideal comprehensive mechanical properties, and a preparation method thereof. The method is used for preparing the gray cast iron material.

Description

technical field [0001] The invention relates to a gray cast iron material, in particular to a low-alloy gray cast iron material for a truck brake drum. The present invention also relates to a preparation method of the above-mentioned low-alloy gray cast iron material. Background technique [0002] Automobile brake drum is the most common braking device, with compact structure and high braking power. It acts on the front and rear hubs of the automobile, which not only affects the braking performance of the automobile, but also affects the balance of the wheels, and at the same time affects the safety of the truck. Performance is guaranteed. With the rapid development of my country's logistics and transportation industry, trucks are developing towards high speed and heavy load. In order to ensure the driving safety performance requirements of trucks, higher process and performance requirements are put forward for the materials and preparation process of truck brake drums. . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08B22C9/02
Inventor 黄怀忠李继林黄志鹏冯伟胜朱明灯杜金良丘璇锋朱耀
Owner 临沂新科绿色建材有限公司
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