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Chromium-free high-boron abrasion-resisting alloy and preparation method thereof

A wear-resistant alloy and high-boron technology, applied in the field of steel wear-resistant materials, can solve the problems of high production costs, achieve the effects of improving performance, increasing element absorption rate, and improving distribution form

Active Publication Date: 2014-09-03
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the current boron-containing wear-resistant alloys are actually developed on the basis of chromium alloys, and they all contain more alloying elements such as chromium, nickel, molybdenum, vanadium, etc., and the production cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]The chemical composition of the chromium-free high-boron wear-resistant alloy in this example is (weight percentage): C 0.53%, B 1.3%, Si 0.75%, Mn 0.46%, Ce 0.05%, P 0.05%, S 0.04% , the balance is iron and impurities, the hardness is 45HRC, and the impact toughness is 12J.

[0036] For smelting, a 100kg medium frequency induction furnace is used. The batching is carried out according to the content and yield of each element in the raw material. The composition (percentage by weight) of the raw materials used is as follows:

[0037] Ferroboron: B 20%, Si 0.6%, P 0.03%, C 0.2%, S 0.03%, the balance is iron and unavoidable impurities;

[0038] Pig iron: C 3.8%, Si 2.2%, Mn 2.8%, P 0.06%, S 0.06%, the balance is iron and unavoidable impurities;

[0039] Steel scrap: C 0.2%, Si 0.2%, Mn 0.5%, P 0.08%, S 0.03%, the balance is iron and unavoidable impurities;

[0040] Ferromanganese: Mn 65%, C 2.0%, P 0.06%, S 0.03%, Si 3.4%, the balance is iron and unavoidable impurities...

Embodiment 2

[0051] The chromium-free high-boron wear-resistant alloy in this example has a chemical composition (percentage by weight): C 0.66%, B 4.0%, Si 0.8%, Mn 0.7%, Ce 0.15%, P 0.06%, S 0.06% , the balance is iron and impurities, the hardness and impact toughness are 58HRC and 10J respectively.

[0052] For smelting, a 100kg medium frequency induction furnace is used. The batching is carried out according to the content and yield of each element in the raw material. The composition (percentage by weight) of the raw materials used is as follows:

[0053] Ferroboron: B 22%, Si 0.4%, P 0.05%, C 0.2%, S 0.02%, the balance is iron and unavoidable impurities;

[0054] Pig iron: C 4%, Si 2.2%, Mn 4%, P 0.06%, S 0.06%, the balance is iron and unavoidable impurities;

[0055] Steel scrap: C 0.3%, Si 0.2%, Mn 0.54%, P 0.08%, S 0.03%, the balance is iron and unavoidable impurities;

[0056] Ferromanganese: Mn 62%, C 2.0%, P 0.06%, S 0.03%, Si 3.4%, the balance is iron and unavoidable impur...

Embodiment 3

[0067] The chromium-free high-boron wear-resistant alloy in this example has a chemical composition (percentage by weight): C 0.68%, B1.0%, Si 1.0%, Mn 0.45%, Ce 0.01%, P 0.08%, S 0.05 %, the balance is iron and impurities, and the hardness and impact toughness are 56HRC and 10J respectively.

[0068] For smelting, a 100kg medium frequency induction furnace is used. The batching is carried out according to the content and yield of each element in the raw material. The composition (percentage by weight) of the raw materials used is as follows:

[0069] Ferroboron: B 18%, Si 0.4%, P 0.03%, C 0.2%, S 0.03%, the balance is iron and unavoidable impurities;

[0070] Pig iron: C 3.3%, Si 2.2%, Mn 2.8%, P 0.06%, S 0.06%, the balance is iron and unavoidable impurities;

[0071] Steel scrap: C 0.1%, Si 0.2%, Mn 0.5%, P 0.08%, S 0.03%, the balance is iron and unavoidable impurities;

[0072] Ferromanganese: Mn 65%, C 2.0%, P 0.06%, S 0.03%, Si 3.4%, the balance is iron and unavoidabl...

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Abstract

The invention discloses a chromium-free high-boron wear-resistant alloy and a preparation method thereof, and belongs to the field of steel wear-resistant materials. The chemical composition of the alloy is (weight percentage): C0.53~0.68%, B1.0~4.5%, Si0.75~1.0%, Mn0.45~1.0%, Ce0.01~0.20%, S0.03~ 0.06%, P0.05~0.08%, the rest is Fe and inevitable impurities, the hardness is 45HRC~58HRC, and the impact toughness is 20J~10J. The alloy is produced using an electric furnace and is heat treated after smelting and casting. The alloy does not contain chromium, is low in price, has good comprehensive properties, has low production cost, simple process and strong operability.

Description

technical field [0001] The invention relates to the field of steel wear-resistant materials, in particular to a chromium-free high-boron wear-resistant alloy and a preparation method thereof. Background technique [0002] Chromium white cast iron is one of the most mature steel wear-resistant materials. However, in recent years, due to lack of resources and skyrocketing prices, the application of chromium-containing wear-resistant alloys has become more and more restricted. Boron, as an abundant element in the earth's crust, is of great significance as a substituted chromium boron. [0003] In the early 1990s, researchers from the Materials Department of Queensland University in Australia developed iron-chromium-boron alloys by adding some boron to high-chromium alloys. Subsequently, some researchers developed boron-containing chromium-based wear-resistant alloys based on chromium-based alloys, as follows: [0004] Chinese invention patent ZL200410089538.0 discloses a hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60C22C38/04B22D1/00
Inventor 刘美红黎振华岑启宏何正员周荣蒋业华董云菊
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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