Fe-Cr-B antifriction alloy containing aluminum and preparation method thereof

A wear-resistant alloy, fe-cr-b technology, used in the field of high-temperature wear-resistant materials, can solve the problems of insufficient wear resistance, brittle fracture and peeling of hard phases, and poor high-temperature oxidation resistance, etc. To achieve the effect of good resistance to high temperature wear, good mechanical properties, and low production costs

Inactive Publication Date: 2011-11-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature oxidation resistance of Fe-Cr-B materials is poor, and the hardness of the matrix decreases significantly at high temperatures, resulting in the metal matrix being unable to provide good support for the hard pha

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The present invention contains aluminum-containing Fe-Cr-B wear-resistant alloy and the preparation method thereof adopts smelting in a 500-kilogram medium-frequency induction furnace, and its manufacturing process steps are:

[0036] ① Mix and heat scrap steel and ferrochromium, and add ferrosilicon after molten steel is melted;

[0037] ② Raise the temperature of the molten steel to 1533°C, add ferroboron and metal aluminum, adjust the composition before the furnace and raise the temperature to 1562°C to release the furnace;

[0038] ③Crush ferrotitanium, metal zinc, rare earth magnesium alloy and sodium-containing modifier into small pieces with a particle size of 6-10mm, dry at 180°C for 2 hours, place them at the bottom of the ladle, and use the method of pouring into the ladle to clean the molten steel. Composite metamorphism;

[0039]④ It is formed by ordinary casting method, and the pouring temperature of molten steel is 1445°C;

[0040] ⑤The castings are poli...

Embodiment 2

[0042] The present invention contains aluminum-containing Fe-Cr-B wear-resistant alloy and the preparation method thereof adopts smelting in a 500-kilogram medium-frequency induction furnace, and its manufacturing process steps are:

[0043] ① Mix and heat scrap steel and ferrochromium, and add ferrosilicon after molten steel is melted;

[0044] ② Raise the temperature of molten steel to 1549°C, add ferroboron and metal aluminum, adjust the composition before the furnace, and raise the temperature to 1577°C to release the furnace;

[0045] ③Crush ferrotitanium, metal zinc, rare earth magnesium alloy and sodium-containing modifier into small pieces with a particle size of 6-10mm, dry at 150°C for 3 hours, place them at the bottom of the ladle, and use the method of pouring into the ladle to clean the molten steel. Composite metamorphism;

[0046] ④ It is formed by ordinary casting method, and the pouring temperature of molten steel is 1459°C;

[0047] ⑤ After the casting is p...

Embodiment 3

[0049] The present invention contains aluminum-containing Fe-Cr-B wear-resistant alloy and the preparation method thereof adopts smelting in a 500-kilogram medium-frequency induction furnace, and its manufacturing process steps are:

[0050] ① Mix and heat scrap steel and ferrochromium, and add ferrosilicon after molten steel is melted;

[0051] ②Raise the temperature of molten steel to 1541°C, add ferroboron and metal aluminum, adjust the composition before the furnace, and raise the temperature to 1573°C to release the furnace;

[0052] ③Crush ferro-titanium, metal zinc, rare earth magnesium alloy and sodium-containing modifier into small pieces with a particle size of 6-10mm, dry at 160°C for 3 hours, place them at the bottom of the ladle, and use the method of pouring into the ladle to clean the molten steel. Composite metamorphism;

[0053] ④ It is formed by ordinary casting method, and the pouring temperature of molten steel is 1450°C;

[0054] ⑤ After the casting is p...

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PUM

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Abstract

The invention discloses a Fe-Cr-B antifriction alloy containing aluminum and a preparation method thereof, belonging to the technical field of high-temperature antifriction materials. The alloy comprises the following chemical compositions in percentage by mass: 0.35-0.50 percent of C; 12.0-14.0 percent of Cr; 1.5-1.8 percent of B; 3.0-3.5 percent of Al; 1.2-1.5 percent of Si; 0.08-0.15 percent of La, and 0.08-0.15 percent of Ce, 0.10-0.15 percent of Ti; 0.32-0.38 percent of Na; 0.12-0.20 percent of Zn; 0.16-0.20 percent of Mg not more than 0.50 percent of Mn, not more than 0.035 percent of S, not more than 0.035 percent of P and the balance of Fe, wherein the sum of La and Ce is not less than 0.22 percent and not more than 0.28 percent. After smelting, casting, machining, quenching and tempering treatments, the alloy has high rigidity, good high-temperature antifriction performance, relatively low production cost and relatively high economic benefit in popularization and application.

Description

technical field [0001] The invention relates to an Fe-Cr-B wear-resistant alloy and a preparation method thereof, in particular to an aluminum-containing Fe-Cr-B wear-resistant alloy and a preparation method thereof, belonging to the technical field of high-temperature wear-resistant materials. Background technique [0002] In many industrial sectors such as metallurgy, electric power, machinery, building materials, national defense, military industry, and aerospace, there are high-temperature wear problems of metal materials. Wear failure; during hot forging, high temperature wear of the mold is also one of the main failure forms. There are also some mechanical parts that often fail due to high temperature wear, such as automobile engine exhaust valves and valve seats, piston collars and cylinder liners, etc. [0003] High-temperature wear is a harsh and complex working condition, which has strict requirements on material properties. It must not only have good heat resista...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C33/04
Inventor 符寒光于震雷永平郭红星蒋业华周荣郭长庆岑启宏窦永平
Owner BEIJING UNIV OF TECH
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