Alloy Bainite ductile cast iron roller surface of high-pressure roller mill and preparation method of alloy Bainite ductile cast iron roller surface

A bainite nodular, high-pressure roller mill technology is applied in the field of metal material preparation, which can solve the problems of difficult austempering of large parts, easy environmental pollution by quenching medium, and many heat treatment processes, etc., to achieve stable strength and wear resistance. , not easy to segregate, the effect of uniform organization

Inactive Publication Date: 2015-11-04
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the bainite ductile iron used in the roller surface of high-pressure roller mills currently adopts isothermal quenching method, and there are many steps in the heat treatme

Method used

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  • Alloy Bainite ductile cast iron roller surface of high-pressure roller mill and preparation method of alloy Bainite ductile cast iron roller surface
  • Alloy Bainite ductile cast iron roller surface of high-pressure roller mill and preparation method of alloy Bainite ductile cast iron roller surface

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The alloy bainite ductile iron roll surface of the high pressure roller mill has the following chemical composition by weight percentage: C: 3.20%, Si: 1.85%, Mn: 0.50%, Mo: 0.62%, Ni: 2.80%, Cu: 0.99 %, Cr: 0.65%, V: 0.43%, P: 0~0.02%, S: 0~0.01%, and the rest are Fe and unavoidable impurities. The preparation process is as follows:

[0034] (1) According to weight percentage: C: 3.20%, Si: 1.85%, Mn: 0.50%, Mo: 0.62%, Ni: 2.80%, Cu: 0.99%, Cr: 0.65%, V: 0.43%, P: 0 ~0.02%, S: 0~0.01%, and the rest are Fe and unavoidable impurities. The selected raw materials are melted in an intermediate frequency furnace at 1400-1520°C, and nodulizers and inoculants are added to the ladle before the furnace is released. Nodulizers are Cu-Mg alloy and 6# alloy, wherein the composition of Cu-Mg alloy is: Mg: 13%, the rest is copper, and the composition of 6# alloy is Si: 44%, Re: 4%, Mg: 9%, Mn: 3.5%, Ca: 2.7%, Ti: 1%, and the rest is Fe. The weight ratio of the two in the nodulizer ...

Embodiment 2

[0044] The alloy bainite ductile iron roll surface of the high pressure roller mill has the following chemical composition by weight percentage: C: 3.35%, Si: 1.75%, Mn: 0.45%, Mo: 0.85%, Ni: 3.58%, Cu: 0.71 %, Cr: 0.65%, V: 0.10%, P: 0~0.02%, S: 0~0.01%, and the rest are Fe and unavoidable impurities. The preparation process is as follows:

[0045] (1) According to weight percentage: C: 3.35%, Si: 1.75%, Mn: 0.45%, Mo: 0.85%, Ni: 3.58%, Cu: 0.71%, Cr: 0.65%, V: 0.10%, P: 0 ~0.02%, S: 0~0.01%, and the rest are Fe and unavoidable impurities. The selected raw materials are melted in an intermediate frequency furnace at 1400-1520°C, and nodulizers and inoculants are added to the ladle before the furnace is released. Nodulizers are Cu-Mg alloy and 6# alloy, wherein the composition of Cu-Mg alloy is: Mg: 15%, the rest is copper, and the composition of 6# alloy is Si: 44%, Re: 6%, Mg: 7%, Mn: 2.3%, Ca: 2%, Ti: 1%, and the rest is Fe. The weight ratio of the two in the nodulizer is...

Embodiment 3

[0051] The alloy bainitic ductile iron roll surface of the high pressure roller mill has the following chemical composition by weight percentage: C: 3.45%, Si: 1.75%, Mn: 0.40%, Mo: 0.95%, Ni: 3.80%, Cu: 0.66 %, Cr: 0.73%, V: 0.13%, P: 0~0.02%, S: 0~0.01%, and the rest are Fe and unavoidable impurities. The preparation process is as follows:

[0052] (1) According to weight percentage: C: 3.45%, Si: 1.75%, Mn: 0.40%, Mo: 0.95%, Ni: 3.80%, Cu: 0.66%, Cr: 0.73%, V: 0.13%, P: 0 ~0.02%, S: 0~0.01%, and the rest are Fe and unavoidable impurities. The selected raw materials are melted in an intermediate frequency furnace at 1400-1520°C, and nodulizers and inoculants are added to the ladle before the furnace is released. Nodulizers are Cu-Mg alloy and 6# alloy, wherein the composition of Cu-Mg alloy is: Mg: 14%, the rest is copper, and the composition of 6# alloy is Si: 44%, Re: 4.6%, Mg: 8.1%, Mn: 2.8%, Ca: 1.9%, Ti: 1%, and the rest is Fe. The weight ratio of the two in the nodul...

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Abstract

The invention provides an alloy Bainite ductile cast iron roller surface of a high-pressure roller mill and a preparation method of the alloy Bainite ductile cast iron roller surface. The cast iron roller surface comprises, by weight, 3.20-3.45% of C, 1.60-1.85% of Si, 0.40-0.60% of Mn, 0.50-1.00% of Mo, 1.50-4.00% of Ni, 0.30-1.00% of Cu, 0.30-1.00% of Cr, 0.10-0.60% of V, 0-0.02% of P, 0-0.01% of S and the balance being Fe and inevitable impurities. The preparation method comprises the four steps of smelting, centrifugal casting, aftertreatment and surface machining. The hardness of the cast iron roller surface is 54.8-63.0 HRC, and the compressive strength of the cast iron roller surface is 1990-3010 MPa. Compared with a cast iron roller surface, prepared by the prior art, of a high-pressure roller mill, the hardness is improved by 18%, and the compressive strength is improved by 70%.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular relates to an alloyed bainite ductile iron roll surface of a high-pressure roller mill and a preparation method thereof. Background technique [0002] High-pressure roller mills have been in existence for ten years, and they are mainly used in the cement industry and some non-ferrous metal mines. The cement industry has obtained higher benefits from this energy-saving and steel-consumption efficient equipment. At present, the amount of crushed ore in the metallurgical mining industry is huge, and most of the metal ore is hard and difficult to grind, and the problems of energy consumption, steel consumption and efficiency of the ball mill currently used are relatively prominent. Whether high-pressure roller mills can be widely used in metallurgical mining has always been a concern of researchers. However, in order to widely apply high-pressure roller mills to ...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08C22C37/04B22D13/02C21D5/00C21D1/18
Inventor 陈礼清崔君军何亚民李海智佟伟平左良魏勇徐智平
Owner NORTHEASTERN UNIV
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