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High-chromium acid-resistant cast iron material as well as preparation method and application thereof

A technology of acid-resistant cast iron and high chromium, applied in the direction of casting molding equipment, molds, mold components, etc., can solve the problems of poor wear resistance and corrosion resistance

Pending Publication Date: 2022-07-22
SHIJIAZHUANG IND PUMP FACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But relatively poor wear and corrosion resistance

Method used

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  • High-chromium acid-resistant cast iron material as well as preparation method and application thereof
  • High-chromium acid-resistant cast iron material as well as preparation method and application thereof
  • High-chromium acid-resistant cast iron material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: 309kg of scrap steel, 600kg of ferrochromium, 22kg of ferromolybdenum, 32kg of nickel plate, 23kg of copper, 5kg of ferrosilicon and 9kg of ferromanganese are added successively in 1 ton of intermediate frequency furnace for heating and melting; when molten iron reaches 1600 ℃, after melting completely To detect the ingredients, add rare earth elements and silicon-aluminum alloys into the ladle, with a total amount of 5kg, and pour them into the ladle after all melting, and pour them into the ladle after all melting.

[0037] When the temperature measurement in the bag reaches 1480℃, the castings are poured, the negative pressure in the sand box is 0.045MPa, and the pouring speed is 1.2t / min. After the pouring is completed, the negative pressure in the sandbox is kept at 0.025MPa, and it is closed after 10 minutes.

Embodiment 2

[0038] Embodiment 2: 260kg of scrap steel, 640kg of ferrochromium, 30kg of ferromolybdenum, 40kg of nickel plate, 12kg of copper, 10kg of ferrosilicon and 9kg of ferromanganese are added successively in 1 ton of intermediate frequency furnace for heating and melting; when molten iron reaches 1590°C, after complete melting To test the ingredients, rare earth elements and silicon-aluminum alloys are added to the ladle, with a total amount of 5kg, and they are all melted and poured into the ladle.

[0039] When the temperature measurement in the bag reaches 1470 ℃, the castings are poured, the negative pressure in the sand box is 0.05MPa, and the pouring speed is 1.2t / min. After the pouring is completed, the negative pressure in the sandbox is kept at 0.026MPa, and it is closed after 10 minutes.

Embodiment 3

[0040]Example 3: 212kg of scrap steel, 680kg of ferrochromium, 46kg of ferromolybdenum, 48kg of nickel plate, 15kg of copper, 11kg of ferrosilicon, and 10kg of ferromanganese were added successively to 1 ton of intermediate frequency furnace for heating and melting; when the molten iron reached 1580°C, after melting completely To test the ingredients, rare earth elements and silicon-aluminum alloys are added to the ladle, with a total amount of 4kg, and they are all melted and poured into the ladle.

[0041] When the temperature measurement in the bag reaches 1450 ℃, the castings are poured, the negative pressure in the sand box is 0.045MPa, and the pouring speed is 1.2t / min. After the pouring is completed, the negative pressure in the sandbox is kept at 0.026MPa, and it is closed after 10 minutes.

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Abstract

The invention relates to a high-chromium acid-resistant cast iron material which comprises the following chemical components in percentage by mass: 1.0-3.0% of C; 35 to 45 parts of Cr; 1.0 to 2.0 parts of Si; mn: < = 1.0; 3.0 to 7.0 parts of Ni; 1.0 to 3.0 parts of Mo; 1.0-3.0% of Cu and the balance of Fe. The invention further relates to a preparation method of the high-chromium acid-resistant cast iron material, and relates to application of smelting, pouring, heat treatment and stable production of slurry pump flow passage components. Compared with austenitic stainless steel 06Cr17Ni12Mo2 (316) and 06Cr19Ni10 (304) materials, the corrosion resistance and the abrasion resistance of the stainless steel material in an oxidizing acid solution containing particulate matter are greatly improved through certain technological treatment.

Description

technical field [0001] The invention relates to the technical field of cast iron materials, in particular to a high-chromium acid-resistant cast iron material, a preparation method and its application in a slurry pump. Background technique [0002] Slurry pumps are widely used in mining, power plants, dredging, metallurgy, chemical industry, building materials and petroleum and other fields for material transportation. Corrosion, impact and other effects are a kind of conventional consumables, and its service life directly restricts the production efficiency and output of production units. Hydrometallurgy is a science and technology that uses leaching agents to dissolve valuable metal components in ores, concentrates, calcines and other materials into solutions or precipitate in new solid phases for metal separation, enrichment and extraction. The relatively cheap sulfuric acid is affected by corrosion. The commonly used materials for slurry pumps in the hydrometallurgical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04C21C1/08C21D1/00C21D5/00C21D6/00C22C30/02C22C33/06C22C33/08C22C37/08C22C37/10C22C38/02C22C38/04C22C38/34C22C38/42C22C38/44C22C38/56
CPCC22C37/08C22C37/10C22C33/08C21C1/08C22C30/02C22C33/06C22C38/02C22C38/04C22C38/34C22C38/56C22C38/44C22C38/42B22C9/04C21D1/00C21D6/004C21D6/005C21D6/008C21D5/00C21D2211/001C21D2211/005
Inventor 于延龙李春海韩跃杨宪明闫龙李启
Owner SHIJIAZHUANG IND PUMP FACTORY CO LTD
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