Process for producing and machining ausferrite nodular cast iron lining plate

A technology of ductile cast iron and processing technology, which is applied in the field of cast iron lining board, can solve the problems of poor wear resistance and easy fracture, and achieve the effects of uniform distribution, improved mechanical properties and fine distribution

Inactive Publication Date: 2019-07-16
NINGGUO HUAFENG WEAR RESISTANT MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the sake of scientific and technological innovation and social development, paying attention to environmental protection and construction, and promoting the continuous replacement of old and new ball mill facilities, there have been theoretical changes to the lining medium requirements of the manufacturing industry, which must adapt to high-power physical impact grinding operations. The current cast iron lining The wear resistance of the board is poor, and it is easy to break, which needs to be solved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A production and processing technology of ausferitic nodular cast iron lining plate, comprising the following steps:

[0018] S1. Put the raw materials into a melting furnace and heat until they are completely melted, then smelt them into ausferitic nodular cast iron raw iron liquid, and take it out of the furnace at a temperature of 1600°C.

[0019] C 2.8%, Si 2%, Mn 0.6%, Cr 0.2%, Mo 0.2%, B 0.08%, Ti 0.02%, V0.01%, P 0.01%, S 0.01%, Mg 0.01%, the balance is Fe;

[0020] S2. Spheroidizing, inoculating, and microalloying the raw iron in sequence, and then pouring it into a sand-coated metal mold, heating it to 1000°C, keeping it warm for 30 minutes, and quenching it into a nitrate solution at a temperature of 140°C. Let it stand for 2 hours, take it out and cool it to room temperature to obtain an ausferitic ductile iron liner.

Embodiment 2

[0022] A production and processing technology of ausferitic nodular cast iron lining plate, comprising the following steps:

[0023] S1. Put the raw materials into a melting furnace and heat until they are completely melted, smelt them into ausferitic nodular cast iron raw iron liquid, and take out the furnace at a temperature of 1600-1680°C. The components of the raw iron liquid include:

[0024] C 3.4%, Si 2.6%, Mn 1.2%, Cr 0.8%, Mo 0.6%, B 0.12%, Ti 0.08%, V0.08%, P 0.04%, S 0.04%, Mg 0.04%, the balance is Fe;

[0025] S2. Spheroidizing, inoculating, and micro-alloying the original molten iron in sequence, and then poured into a sand-coated metal mold, heated to 1090°C, kept for 60 minutes, and quenched into a nitrate solution at a temperature of 180°C. Let it stand for 4 hours, take it out and cool it to room temperature to obtain an ausferitic ductile iron liner.

Embodiment 3

[0027] A production and processing technology of ausferitic nodular cast iron lining plate, comprising the following steps:

[0028] S1. Put the raw materials into a melting furnace and heat until they are completely melted, then smelt them into ausferitic nodular cast iron raw iron liquid, and take out the furnace at a temperature of 1620°C.

[0029] C 3.0%, Si 2.3%, Mn 0.9%, Cr 0.4%, Mo 0.4%, B 0.00%, Ti 0.05%, V0.04%, P 0.02%, S 0.02%, Mg 0.02%, the balance is Fe;

[0030] S2. Spheroidizing, inoculating, and micro-alloying the raw molten iron in sequence, pouring it into a sand-coated metal mold, heating it to 1020°C, keeping it warm for 40 minutes, and quenching it into a nitrate solution at a temperature of 145°C. Let it stand for 3 hours, take it out and cool it to room temperature to obtain an ausferitic ductile iron liner.

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PUM

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Abstract

The invention discloses a process for producing and machining an ausferrite nodular cast iron lining plate. The process comprises the following steps that raw materials are placed into a melting furnace to be heated till being completely molten, and the raw materials are molten into ausferrite nodular cast iron base iron melt and discharged from a furnace, wherein the base iron melt comprises, byweight, 2.8-3.4% of C, 2-2.6% of Si, 0.6-1.2% of Mn, 0.2-0.8% of Cr, 0.2-0.6% of Mo, 0.08-0.12% of B, 0.02-0.08% of Ti, 0.01-0.08% of V, 0.01-0.04% of P, 0.01-0.04% of S, 0.01-0.04% of Mg and the balance Fe; and the base iron melt is subjected to spheroidizing treatment, inoculation treatment and microalloying treatment in sequence, poured into a sand-coated metal mold, heated, insulated, quenchedinto a nitrate solution, placed for standing, and cooled to room temperature to obtain the ausferrite nodular cast iron lining plate. The process is simple, the cost is low, the product is good in wear resistance and not likely to be fractured, the volume hardness HRC can reach 61.42, the impact toughness can reach 9.12J/cm<2>, and the falling body impact fatigue life can reach 15000 times.

Description

technical field [0001] The invention relates to the technical field of cast iron lining boards, in particular to a production and processing technology for ausferitic nodular cast iron lining boards. Background technique [0002] For the sake of scientific and technological innovation and social development, paying attention to environmental protection and construction, and promoting the continuous replacement of old and new ball mill facilities, there have been theoretical changes to the lining medium requirements of the manufacturing industry, which must adapt to high-power physical impact grinding operations. The current cast iron lining The wear resistance of the board is poor, and it is easy to break, which needs to be solved urgently. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a production and processing process for ausferitic nodular cast iron liners. The process of the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/06C22C37/10C22C33/08C22C37/04C21D1/18C21D5/00
CPCC21D1/18C21D5/00C22C33/08C22C37/04C22C37/06C22C37/10
Inventor 陈全心姚永茂吴明忠周峰陈灿光
Owner NINGGUO HUAFENG WEAR RESISTANT MATERIAL
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