A kind of ultra-high wear-resistant hypereutectic high-chromium cast iron material, preparation method and application thereof

A high-chromium cast iron, hypereutectic technology, applied to the application of slurry pumps, ultra-high wear-resistant hypereutectic high-chromium cast iron materials, in the field of preparation, can solve the problems of insufficient wear resistance and short service life, and achieve Improved wear resistance, improved hardening depth, high carbon and chromium content effects

Active Publication Date: 2020-07-14
SHIJIAZHUANG IND PUMP FACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the flow parts of wear-resistant slurry pumps at home and abroad generally use BTMCr26 and 15CrMo3, etc., which have a good service life in general wear conditions, but in such heavy wear conditions in the metallurgical and mineral processing industry, their insufficient wear resistance leads to the use of Short service life is the bottleneck restricting the development of slurry pumps in this type of industry

Method used

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  • A kind of ultra-high wear-resistant hypereutectic high-chromium cast iron material, preparation method and application thereof
  • A kind of ultra-high wear-resistant hypereutectic high-chromium cast iron material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: 1214.7 kg of steel scrap, 10 kg of recarburizer, 1524.5 kg of ferrochromium, 173.3 kg of ferromolybdenum, 11.1 kg of nickel plate, and 76.5 kg of ferromanganese are added to a 3-ton intermediate frequency furnace for heating and melting; when the molten iron reaches 1540 ℃, add rare earth elements and ferrotitanium into the furnace, and the total amount added is 15 kg. After melting, it comes out of the oven.

[0034] When the temperature in the bag reaches 1420°C, pour the casting. When pouring, add chromium carbide powder or tungsten carbide powder to incubate with the flow, and the addition is 2 kg.

Embodiment 2

[0035] Embodiment 2: 1238.4 kg of steel scrap, 23 kg of recarburizer, 1490.3 kg of ferrochromium, 179 kg of ferromolybdenum, 10.5 kg of nickel plate, and 81.9 kg of ferromanganese are added to a 3-ton intermediate frequency furnace for heating and melting; when the molten iron reaches 1550 ℃, add rare earth elements and ferro-titanium into the furnace, and the total amount added is 12 kg. After melting, it comes out of the oven.

[0036] When the temperature in the bag reaches 1410°C, pour the casting. When pouring, add chromium carbide powder or tungsten carbide powder to incubate with the flow, and the addition is 2 kg.

Embodiment 3

[0037] Embodiment 3: Add 1168.5 kilograms of scrap steel, 25 kilograms of recarburizer, 1556.6 kilograms of ferrochrome, 178.4 kilograms of ferromolybdenum, 12.6 kilograms of nickel plates, and 83.8 kilograms of ferromanganese into a 3-ton intermediate frequency furnace for heating and melting; when the molten iron reaches 1540 °C, add rare earth elements and ferrotitanium into the furnace, the total amount added is 9 kg. After melting, it comes out of the oven.

[0038] When the temperature in the bag reaches 1420°C, pour the casting. When pouring, add chromium carbide powder or tungsten carbide powder to incubate with the flow, and the addition is 2 kg.

[0039] After the castings of the above three embodiments are cooled to 350-400° C. in the sand box, generally 40 hours after pouring, the box is shaken. After cooling to normal temperature, remove the pouring and riser, and then polish it.

[0040] After grinding, the casting is annealed in a heat treatment furnace. The a...

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Abstract

The invention relates to an ultra-high wear-resistant hypereutectic high chromium cast iron material which comprises the following chemical components in percentage by mass: 4.0-5.0% of C, 25-35% of Cr, 0.5-1.0% of Si, 1.5-2.5% of Mn, less than or equal to 1% of Ni, 2-4% of Mo, and the balance Fe. The invention also relates to a preparation method of the ultra-high wear-resistant hypereutectic high chromium cast iron material, and relates to a smelting technology and an application of stable production of slurry pump flowing parts. Compared with BTMCr26 and Cr15Mo3 materials, the ultra-high wear-resistant hypereutectic high chromium cast iron material has a high carbon content and a high chromium content and a large amount of carbides, and the wear resistance of the material can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of cast iron materials, in particular to an ultra-high wear-resistant hypereutectic high-chromium cast iron material, a preparation method and its application in a slurry pump. Background technique [0002] Slurry pumps are widely used in ore dressing, electric power, seawater sand dressing and other fields. The working conditions are complex and harsh, and the causes of wear to the selected materials are also extremely complicated. On the one hand, the flow-passing parts are subject to erosion wear, abrasive wear, and surface fatigue. On the other hand, it is affected by the particle size, shape, hardness of the solid particles in the medium, the concentration of the medium, the flow velocity, and the corrosiveness of the medium. Especially in metallurgical mines, the material has high hardness, large particles, and uneven shape. As the main equipment for transporting ore, the wear and tear of the slurry pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/08C22C33/08C21D5/00C21D1/26C21D1/18
CPCC21D1/18C21D1/26C21D5/00C22C33/08C22C37/08C22C37/10Y02P10/20
Inventor 李春海于延龙路春谦韩跃杨宪明王绍昌刘洪波
Owner SHIJIAZHUANG IND PUMP FACTORY CO LTD
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