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Vanadium-containing high-boron high-chromium wear-resistant alloy and preparation method thereof

A wear-resistant alloy and high-boron technology, applied in the field of metal wear-resistant materials, can solve the problems of increasing the production cost of high-chromium cast iron, etc., and achieve the effects of short heat treatment cycle, good impact toughness, good oxidation resistance and corrosion resistance

Inactive Publication Date: 2013-09-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low boron content, in order to improve hardenability, 0.5~2.0% Mo is added, which increases the production cost of high chromium cast iron

Method used

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  • Vanadium-containing high-boron high-chromium wear-resistant alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Melt scrap steel and ferrochrome in an intermediate frequency induction furnace, add nickel plate, ferrosilicon and ferromanganese after molten steel is melted;

[0037] (2) When the temperature of the molten steel rises to 1550~1600°C, add 0.1% of the molten steel mass for aluminum deoxidation, and then add ferrovanadium, ferrotitanium and ferroboron in sequence;

[0038] (3) After the composition is adjusted in front of the furnace, when the temperature reaches 1430~1480°C, pour molten steel into the sand mold;

[0039] (4) After the casting is polished and cleaned, it is subjected to stress relief treatment, heated to 350°C with the furnace, kept for 6 hours, and then air-cooled or furnace air-cooled to room temperature to obtain a vanadium-containing, high-boron, high-chromium wear-resistant alloy. The chemical composition of the alloy is shown in Table 1, and the mechanical properties and wear resistance are shown in Table 2. The wear test was carried out on a...

Embodiment 2

[0041] (1) Melt scrap steel and ferrochrome in an intermediate frequency induction furnace, add nickel plate, ferrosilicon and ferromanganese after molten steel is melted;

[0042] (2) When the temperature of the molten steel rises to 1550~1600°C, add 0.1% of the molten steel mass for aluminum deoxidation, and then add ferrovanadium, ferrotitanium and ferroboron in sequence;

[0043] (3) After the composition is adjusted in front of the furnace, when the temperature reaches 1430~1480°C, pour molten steel into the sand mold;

[0044] (4) After the casting is polished and cleaned, the casting is heated to 1050°C with the furnace, kept for 4 hours, then air-cooled to room temperature, and finally tempered at 200°C for 4 hours. The chemical composition of the alloy is shown in Table 1, the mechanical properties and wear resistance are shown in Table 2, and the wear test is the same as in Example 1.

Embodiment 3

[0046] (1) Melt scrap steel and ferrochrome in an intermediate frequency induction furnace, add nickel plate, ferrosilicon and ferromanganese after molten steel is melted;

[0047] (2) When the temperature of the molten steel rises to 1550~1600°C, add 0.1% of the molten steel mass for aluminum deoxidation, and then add ferrovanadium, ferrotitanium and ferroboron in sequence;

[0048] (3) After the composition is adjusted in front of the furnace, when the temperature reaches 1430~1480°C, pour molten steel into the sand mold;

[0049] (4) After the casting is polished and cleaned, heat the casting to 1100°C with the furnace, keep it warm for 2 hours, then air-cool to room temperature, and finally temper at 350°C for 2 hours. The chemical composition of the alloy is shown in Table 1, the mechanical properties and wear resistance are shown in Table 2, and the wear test is the same as in Example 1.

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Abstract

The invention provides a vanadium-containing high-boron high-chromium wear-resistant alloy and a preparation method thereof, belonging to the technical field of wear-resistant materials. The alloy is characterized in that a strengthening phase is iron chromium boride and VC, the volume fraction of the strengthening phase is 15 to 40%, and chemical components of the alloy comprise, by weight, 0.10 to 0.80% of C, 0.5 to 1.5% of Si , 0.5 to 3.0% of Mn, 2.0 to 28.0% of Cr, 0.5 to 3.0% of Ni, 0.5 to 6.0% of B, 0.5 to 10.0% of V, 0.5 to 3.0% of Ti, less than 0.04% of P and less than 0.04% of S, with the balance being Fe and unavoidable impurities. The alloy provided by the invention can be directly used after electric-furnace smelting, casting forming, polishing and cleaning and removal of stress at a temperature of 200 to 650 DEG C and has the advantages of simple preparation process, low energy consumption, good strength, hardness, toughness and wear resistance, oxidation resistance, corrosion resistance, etc.

Description

technical field [0001] The invention belongs to the technical field of metal wear-resistant materials, and mainly relates to a vanadium-containing, high-boron, high-chromium wear-resistant alloy and a preparation method thereof. Background technique [0002] Material wear is an important reason for equipment failure and material damage in industries such as metallurgical mines, building materials, cement, construction machinery and thermal power generation, and is also one of the reasons for the most economic losses. New wear-resistant materials with high strength, high hardness, toughness and good wear resistance are undoubtedly of great significance for reducing the wear of metal materials. [0003] At present, there are three main categories of wear-resistant materials widely used: 1. Manganese-based wear-resistant alloy steel, represented by high-manganese steel; 2. Low- and medium-alloy wear-resistant steel; 3. Wear-resistant cast iron, represented by high-chromium cast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/54C22C33/06
Inventor 刘颖杨浩李军张辉马瑜
Owner SICHUAN UNIV
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