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High-temperature-resistant casting cobalt-based alloy and preparation method thereof

A technology of cobalt-based alloy and high temperature resistance, which is applied in the field of high temperature-resistant casting cobalt-based alloy and its preparation, can solve the problems of low production temperature and high cost, and achieves reduction of oxide inclusions, cost reduction, and round and fine grains. Effect

Active Publication Date: 2012-12-05
武钢中冶工业技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these high-temperature alloys used in China are made of alloys with Co50 or higher cobalt content, and the cost is high
Moreover, many developed materials can only meet the needs of lower production temperatures less than 1150°C.

Method used

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  • High-temperature-resistant casting cobalt-based alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] High temperature resistant cast cobalt-based alloy, the chemical composition of the alloy is: Co: 40%, Cr: 27, Ni: 25%, Si: 0.5%, Nb: 1.0%, Mn: 1%, C: 0.05%, RE: 0.01, and the rest is Fe. Among them, the content of Ce and La in RE is 52%.

[0026] 1) Prepare Co, Cr, Ni, Si, Nb, Mn, C, RE and Fe raw materials with corresponding contents according to the weight percentage of the chemical composition of the alloy;

[0027] 2) Put Co, Cr, Ni, Nb and Fe raw materials into the induction furnace, mix and melt them into a cobalt-based alloy melt;

[0028] 3) Superheat the cobalt-based alloy melt to 1600°C, then add ferromanganese and ferrosilicon, perform pre-deoxidation treatment, remove surface slag, and then adjust the temperature of the pre-deoxidized cobalt-based alloy melt to 1550°C;

[0029] 4) Add RE raw materials to the pre-deoxidized cobalt-based alloy melt to refine and modify the melt;

[0030] 5) Remove the slag on the surface of the cobalt-based alloy melt after...

Embodiment 2

[0034] High temperature resistant cast cobalt-based alloy: the chemical composition of the alloy is as follows: Co: 18%, Cr: 32%, Ni: 10%, Si: 2.0%, Nb: 3.0%, Mn: 0.5%, C : 0.12%, RE: 0.1%, and the rest is Fe, among which, the content of Ce and La in RE is 52%.

[0035] 1) Prepare Co, Cr, Ni, Si, Nb, Mn, C, RE and Fe raw materials with corresponding contents according to the weight percentage of the chemical composition of the alloy;

[0036] 2) Put Co, Cr, Ni, Nb and Fe raw materials into the induction furnace, mix and melt them into a cobalt-based alloy melt;

[0037] 3) Superheat the cobalt-based alloy melt to 1650°C, then add ferromanganese and ferrosilicon, perform pre-deoxidation treatment, remove surface slag, and then adjust the temperature of the pre-deoxidized cobalt-based alloy melt to 1600°C;

[0038] 4) Add RE raw materials to the pre-deoxidized cobalt-based alloy melt to refine and modify the melt;

[0039] 5) Remove the slag on the surface of the cobalt-based ...

Embodiment 3

[0042] High temperature resistant cast cobalt-based alloy: the chemical composition of the alloy is as follows: Co: 25%, Cr: 30%, Ni: 15%, Si: 1.0%, Nb: 2.0%, Mn: 0.7%, C : 0.12%, RE: 0.07%, and the rest is Fe, among which, the content of Ce and La in RE is 52%.

[0043] 1) Prepare Co, Cr, Ni, Si, Nb, Mn, C, RE and Fe raw materials with corresponding contents according to the weight percentage of the chemical composition of the alloy;

[0044] 2) Put Co, Cr, Ni, Nb and Fe raw materials into the induction furnace, mix and melt them into a cobalt-based alloy melt;

[0045] 3) Superheat the cobalt-based alloy melt to 1620°C, then add ferromanganese and ferrosilicon for pre-deoxidation treatment to remove surface slag; then adjust the temperature of the pre-deoxidized cobalt-based alloy melt to 1580°C;

[0046] 4) Add RE raw materials to the pre-deoxidized cobalt-based alloy melt to refine and modify the melt;

[0047] 5) Remove the slag on the surface of the cobalt-based alloy ...

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Abstract

The invention discloses a high-temperature-resistant casting cobalt-based alloy and a preparation method thereof. The alloy comprises following chemical compositions by weight percentage: 18 to 40 percent of Co, 27 to 32 percent of Cr, 10 to 25 percent of Ni, 0.5 to 2 percent of Si, 1.0 to 3.0 percent of Nb, 0.5 to 1 percent of Mn, 0.05 to 0.12 percent of C, 0.01 to 0.1 percent of RE, and the rest percent of Fe. The high-temperature-resistant casting cobalt-based alloy and the preparation method thereof have the advantages that through reasonable selection of raw materials, a melting process, a modification treatment process of melt, a pouring process, and the like, the comprehensive performance of the cobalt-based high temperature alloy material is effectively improved; the material can be used for manufacturing parts, such as cobalt-based alloy roll collars of continuous casting and continuous rolling conveyor belts, and the like; good melt treatment measures and a reasonable melting sequence are adopted by the preparation method, and deoxidizers and RE rare earth refining agents with remarkable effects are added, so that oxide inclusions in the melt are greatly reduced and solid solution strengthening effects of alloy elements are greatly improved.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal materials and their preparation and molding, and relates to a high-temperature-resistant casting cobalt-based alloy and a preparation method thereof. technical background [0002] The continuous casting and rolling short-process steel rolling production line is a major high-tech in the development of steel production technology in the world today. A series of high and new technologies such as automatic detection of plate shape and computer process control have led to the continuous and automatic production from molten steel to finished products in tropical production, with compact production process, short cycle, high yield, low energy consumption, low investment and low cost. A series of advantages such as low cost and obvious economic benefits. The continuous casting and rolling production line needs a tunnel-type and roller-hearth heating furnace to heat the steel plate, and the steel plate mo...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/06
Inventor 余光明吴树森卢献忠毛有武吴建鹏胡诚刘龙飞杨书范杜雪唐钟毅
Owner 武钢中冶工业技术服务有限公司
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