High boron wear-resisting casting steel and preparation process thereof

A cast steel, high boron technology, applied in the direction of manufacturing tools, heat treatment equipment, heat treatment process control, etc., can solve the problem of difficult to resist heavy load and high stress abrasive wear, low bonding strength between the wear-resistant layer and the base material, easy to crack or even peel off and other issues, to achieve the effect of low production cost, sufficient source of raw materials, and improved strength and toughness

Inactive Publication Date: 2007-07-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bonding strength between the boride-containing wear-resistant layer obtained by the surfacing process and the base material is low, and it is easy to crack or even peel off und

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ① Mix and melt common steel scrap, pig iron, ferrochrome and copper plate in a 500 kg intermediate frequency induction furnace, add ferromanganese and ferroboron after the molten steel is melted;

[0036] ② After adjusting the composition before the furnace, the temperature is raised to 1630°C, adding 0.23% of the weight of molten steel to deoxidize aluminum, and then out of the furnace;

[0037] ③ Ferro-titanium, cerium-based rare earth magnesium alloy and nitrogen-containing substances are broken into small pieces with a particle size of less than 15 mm. After drying at 245 ° C, they are placed at the bottom of the ladle, and the molten steel is subjected to compound modification treatment by the method of pouring into the ladle;

[0038] ④ The casting is formed by ordinary clay sand casting, and the pouring temperature of molten steel is 1450°C;

[0039] ⑤ After the casting is austenitized at a high temperature of 1020°C, it is rapidly cooled by oil cooling, and then...

Embodiment 2

[0046] ①Heating and melting ordinary steel scrap, pig iron, ferrochrome and copper plate in a 1500kg intermediate frequency induction furnace, adding ferromanganese and ferroboron after the molten steel is melted;

[0047] ② After adjusting the composition before the furnace, the temperature is raised to 1595°C, adding 0.14% of the weight of molten steel to deoxidize aluminum, and then it is released from the furnace;

[0048] ③Crush ferrotitanium, cerium-based rare earth magnesium alloy, and nitrogen-containing substances into small pieces with a particle size of less than 15mm. After drying at 230°C, place them at the bottom of the ladle, and perform compound modification treatment on molten steel by pouring into the ladle;

[0049] ④ The casting is formed by ordinary resin sand casting, and the pouring temperature of molten steel is 1428°C;

[0050] ⑤ After the casting is austenitized at a high temperature of 915°C, it is rapidly cooled by water cooling, and then kept at 18...

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PUM

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Abstract

The present invention discloses one kind of antiwear high-boron cast steel and its preparation process. The antiwear high-boron cast steel has the chemical components including C 0.10-0.50 wt%, B 0.8-5.0 wt%, Cu 0.3-0.6 wt%, Mn 0.8-2.0 wt%, Cr 1.0-2.5 wt%, Si less than 1.5 wt%, Ti 0.08-0.20 wt%, Ce 0.04-0.12 wt%, Mg 0.02-0.18 wt%, N 0.06-0.18 wt%, S less than 0.05 wt%, P less than 0.05 wt%, and Fe and inevitable impurity for the rest. Its preparation process includes smelting in an electric furnace while adding ferromanganese, frrroboron and Al to deoxidize, composite modification of molten steel, fast cooling, and low temperature tempering to eliminate stress. The present invention has simple production process, low production cost and other advantages.

Description

technical field [0001] The invention belongs to the field of metal wear-resistant material manufacturing, and relates to a cast steel, in particular to a high-boron wear-resistant cast steel and a preparation method thereof. Background technique [0002] Due to the great danger of wear and failure of mechanical products, various industrial sectors have listed their wearable parts as key research topics. Improving the quality of materials resistant to abrasive wear is the key to improving the life of wearable parts. In terms of anti-abrasive wear materials, nickel-hard white cast iron and high-chromium white cast iron are widely used at home and abroad. Chinese invention patent CN1039267 has reported the composition and preparation technology of a kind of wear-resistant high-chromium cast iron, and the specific chemical composition (by weight percentage) of this cast iron is 2.9~3.2%C, 0.4~0.8%Si, 0.4~1.0%Mn , 1.2-2.0% Mo, 18.0-20.0% Cr, 4.0-5.0% V, 0.8-1.2% Cu, 0.05-0.5% RE...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C38/38C22C33/04C21C7/06B22D27/04C21D9/00C21D11/00
Inventor 符寒光邢建东高义民皇志富
Owner XI AN JIAOTONG UNIV
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