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Metal material used for preparing flow passage component of slurry pump and preparation method of metal material

A technology of flow parts and metal materials, which is applied in the field of metal materials for the flow parts of slurry pumps, can solve the problems of high cost, achieve good support, high hardness, and avoid breaking and peeling effects

Active Publication Date: 2013-04-03
SHIJIAZHUANG IND PUMP FACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

KmTBCr26 material has excellent wear resistance, but the cost is high

Method used

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  • Metal material used for preparing flow passage component of slurry pump and preparation method of metal material
  • Metal material used for preparing flow passage component of slurry pump and preparation method of metal material
  • Metal material used for preparing flow passage component of slurry pump and preparation method of metal material

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Embodiment Construction

[0022] The present invention will be described in further detail below in combination with specific embodiments.

[0023] According to the chemical composition requirements of the material of the present invention, a reasonable batching plan is formulated, see Examples 1-6; various furnace materials are sequentially added to the intermediate frequency furnace for melting according to the requirements of the smelting process, and the molten iron is released when it reaches 1520°C to 1580°C Pouring, resin sand molding, the pouring temperature is 1400 ℃ ~ 1450 ℃. After the casting is cooled, remove the sprue and riser. Castings are heated up to 930-950°C at a certain speed in the heat treatment furnace, kept warm for 4-7 hours and then air-cooled, and then tempered at 200-220°C in time.

[0024] The chemical composition results are shown in Table 1.

[0025] The chemical composition of each embodiment of table 1, content in the table is weight percent composition

[0026]

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Abstract

The invention discloses a metal material used for preparing a flow passage component of a slurry pump, which comprises the following components in percentage by weight: 2.2-2.8% of C, 13-20% of Cr, 0.5-1.0% of Si, 1.0-1.5% of Mn, 0.3-0.8% of Mo, 0.1-0.4% of B, 0.2-0.5% of Ti, less than 0.1% of S, less than 0.1% of P, and the balance of iron. The invention also provides a method for preparing the flow passage component by using the materials. The method comprises the following steps of: melting pig iron, waste steel and the like in a furnace; after melting clearly, adding ferromolybdenum and the like; regulating the components and heating, adding ferrotitanium and ferroboron, discharging and casting; shaping and machining; performing thermal treatment to the cast, cooling in air, and tempering. The metal material contains a large amount of alloy elements, the base rigidity is improved, the carbide is protected against untimely breaking and stripping; and the ratio of the alloy-alloy carbide is enhanced, and the alloy carbide is high in rigidity, excellent in wearing resistance effect and low in cost.

Description

technical field [0001] The invention relates to a metal material with high wear resistance, in particular to a metal material used to manufacture flow-passing parts of a slurry pump. Background technique [0002] Slurry pumps are widely used in electric power, metallurgy, coal, building materials and other industries to transport slurry containing solid particles. Such as hydraulic ash removal in thermal power plants, slurry transportation in metallurgical beneficiation plants, coal slurry and heavy medium transportation in coal washing plants, etc. The maximum slurry weight concentration Cw allowed to be transported is: 45% for ash (slag) slurry and coal slurry; 60% for ore slurry and heavy medium. Therefore, the flow-passing parts of the slurry pump, such as the impeller, volute, guard plate and other parts, have relatively high requirements on the wear resistance of the material, and KmTBCr26 (anti-wear white cast iron) is mostly used in China. KmTBCr26 material has exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/36C22C38/32
Inventor 李春海苏进于延龙路春谦冯卫红何彦书曹金燕刘洪波韩跃张杨杨
Owner SHIJIAZHUANG IND PUMP FACTORY CO LTD
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