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Fe-Cr-B cast abrasion-resistant alloy and manufacturing method thereof

A wear-resistant alloy and a manufacturing method of the technology are applied in the manufacture of cast wear-resistant alloys, the manufacture of iron-chromium-boron cast wear-resistant alloys with boron alloy elements, and in the field of containing chromium, which can solve the problem of poor wear resistance and a small number of wear-resistant hard phases, etc. problems, to achieve excellent wear resistance, good wear resistance and thermal fatigue resistance, and improve the efficiency of equipment operation.

Inactive Publication Date: 2010-07-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Russian patent RU2352681-C1 also discloses a kind of wear-resistant cast steel. -0.1Ca, 0.1-0.3W, 0.1-0.3P, 0.01-0.03Be, 0.001-0.003Sb, 0.12-0.16B, 0.01-0.03Ba, due to the small amount of boron added, the amount of wear-resistant hard phase is small, and the wear-resistant slightly less abrasive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Using a 250 kg medium frequency induction furnace to melt iron-chromium-boron cast wear-resistant alloys and cast rolling guide rollers, the manufacturing process steps are:

[0029] ①Heat and melt ordinary steel scrap and ferrochromium, add ferrosilicon and ferromanganese after molten steel is melted, add ferrosilicon and ferromanganese for 3 minutes, then add ferroboron;

[0030] ② After adjusting the composition before the furnace, the temperature is raised to 1607°C, adding 0.12% of the mass of molten steel to deoxidize aluminum, and then adding ferro-titanium and magnesium-nickel alloy for 1 minute before being released from the furnace;

[0031] ③Crush cerium-based rare earth ferrosilicon, nitrogen-containing ferrochromium and metal zinc into small pieces with a particle size of 8-12mm. After drying at 200°C, place them at the bottom of the ladle, and use the method of pouring into the ladle to microalloy the molten steel. treatment;

[0032] ④The temperature of ...

Embodiment 2

[0036] A 500 kg intermediate frequency induction furnace is used to smelt iron-chromium-boron casting wear-resistant alloy cold-working molds. The manufacturing process steps are:

[0037] ①Heat and melt ordinary steel scrap and ferrochrome, add ferrosilicon and ferromanganese after molten steel is melted, add ferrosilicon and ferromanganese for 5 minutes, then add ferroboron;

[0038] ② After adjusting the composition before the furnace, the temperature is raised to 1582°C, adding 0.08% of the molten steel mass for aluminum deoxidation, and then adding ferro-titanium and magnesium-nickel alloy for 3 minutes before being released from the furnace;

[0039] ③Crush cerium-based rare earth ferrosilicon, nitrogen-containing ferrochromium and metal zinc into small pieces with a particle size of 8-12mm. After drying at 150°C, place them at the bottom of the ladle, and use the method of pouring into the ladle to microalloy the molten steel. treatment;

[0040] ④The temperature of th...

Embodiment 3

[0044] Using a 500 kg medium frequency induction furnace to melt iron-chromium-boron cast wear-resistant alloy liners, the manufacturing process steps are:

[0045] ①Heat and melt ordinary steel scrap and ferrochrome, add ferrosilicon and ferromanganese after molten steel is melted, add ferrosilicon and ferromanganese for 4 minutes, then add ferroboron;

[0046]② After adjusting the composition before the furnace, the temperature is raised to 1595°C, adding 0.10% of the mass of molten steel to deoxidize aluminum, and then adding ferro-titanium and magnesium-nickel alloy for 2 minutes before being released from the furnace;

[0047] ③Crush cerium-based rare earth ferrosilicon, nitrogen-containing ferrochromium and metal zinc into small pieces with a particle size of 8-12mm. After drying at 180°C, place them at the bottom of the ladle, and microalloy the molten steel by pouring into the ladle. treatment;

[0048] ④The temperature of the molten steel drops to 1491°C, and it is d...

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Abstract

The invention discloses Fe-Cr-B cast abrasion-resistant alloy and a manufacturing method thereof, the alloy comprises the following chemical compositions by mass percent: 0.22-0.45% of C, 12.0-18.0% of Cr, 0-8-1.5% of Si, 0-6-1.5% of Mn, 0-9-1.2% of B, 0.30-0.45% of Ni, 0.02-0.04% of Mg, 0.03-0.05% of Ce, 0.04-0.08% of Ti, 0.008-0.015% of N, 0.06-0.09% of Zn, less than 0.04% of S, less than 0.04% of P and the balance of Fe. After melting, casting and hot-processing, the hardness and toughness of the Fe-Cr-B cast abrasion-resistant alloy can be adjusted in a wide range so as to meet the requirements of different abrasion working conditions. The invention uses low-cost chromium and boron as the main alloying elements, does not contain expensive alloying elements such as tungsten, molybdenum, vanadium, niobium and the like, has the characteristics of high hardness, good toughness and the like, and has low cost, and has good economic benefit when being popularized.

Description

technical field [0001] The invention relates to a method for manufacturing a cast wear-resistant alloy, in particular to a method for manufacturing an iron-chromium-boron cast wear-resistant alloy containing chromium and boron alloy elements, and belongs to the technical field of wear-resistant material manufacture. technical background [0002] Wear-resistant materials are indispensable and important consumable parts in crushing and grinding equipment in the industrial field. Most of them are produced by casting, which not only consumes a lot, but also has a wide range of applications. The survey shows that in 2006, the national consumption in friction, The funds for wear and lubrication are 950 billion yuan, while the spare parts consumption and equipment maintenance costs caused by wear and tear are 28.3 billion yuan and 40.6 billion yuan respectively (2009 Chinese Academy of Engineering Consulting Research Report). With the advancement of industrial technology, the servi...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C33/06
Inventor 符寒光郭长庆雷永平黎振华田玉铁尹恩生蒋志强
Owner BEIJING UNIV OF TECH
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