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A kind of wear-resistant cast iron material and its preparation method and spiral leaf guard made of it

A technology of wear-resistant cast iron and spiral blades, which is applied in the field of metal materials and preparation, can solve the problems of easy-wear spiral assembly, low wear resistance, complex and harsh, etc., and achieve improved wear resistance, wear resistance and impact toughness , the effect of convenient operation

Active Publication Date: 2017-01-25
SICHUAN HONGJIAN HEAVY MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working conditions of screw mixing and screw conveying are generally complicated and harsh, with both the erosion and wear of sand and the impact of large objects such as stones. Because the screw blades need to be stretched and welded (compared with the rotating Shaft forms a spiral assembly), its material requires a certain elongation and weldability, and the wear resistance of this type of material is relatively low, so that the spiral blade is easy to wear during use and the entire spiral assembly is scrapped

Method used

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  • A kind of wear-resistant cast iron material and its preparation method and spiral leaf guard made of it
  • A kind of wear-resistant cast iron material and its preparation method and spiral leaf guard made of it
  • A kind of wear-resistant cast iron material and its preparation method and spiral leaf guard made of it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Anti-wear cast iron material, composed of the following chemical composition in mass percentage: C 2.1%, Si 0.8%, Mn0.7%, Cr 25.2%, Ni 0.9%, P 0.05%, S 0.05%, Ti 0.08%, V 0.42% , the balance being Fe and unavoidable impurities.

[0037] The preparation method of the anti-wear cast iron material of the present embodiment:

[0038](1) According to the material composition requirements in this embodiment, a batching plan is formulated; various furnace materials are sequentially added to the intermediate frequency furnace for melting according to the requirements of the smelting process, that is, after power-on, pig iron, scrap steel, and ferrochrome are sequentially put into the furnace Heating and melting, adding nickel plate, ferrosilicon and ferromanganese after dissolving; (2), adding fine-grained ferrovanadium and ferrotitanium into the molten iron ladle, adding V and Ti elements by flushing; (3), adjusting Composition to suitable range (mass percentage chemical comp...

Embodiment 2

[0040] Anti-wear cast iron material, composed of the following chemical composition in mass percentage: C 2.2%, Si 0.8%, Mn0.6%, Cr 25.4%, Ni 0.9%, P 0.045%, S 0.049%, Ti 0.10%, V 0.38% , the balance being Fe and unavoidable impurities.

[0041] The preparation method of the anti-wear cast iron material of the present embodiment:

[0042] (1) According to the material composition requirements in this embodiment, a batching plan is formulated; various furnace materials are sequentially added to the intermediate frequency furnace for melting according to the requirements of the smelting process, that is, after power-on, pig iron, scrap steel, and ferrochrome are sequentially put into the furnace Heating and melting, adding nickel plate, ferrosilicon and ferromanganese after dissolving; (2), adding fine-grained ferrovanadium and ferrotitanium into the molten iron ladle, adding V and Ti elements by flushing; (3), adjusting Composition to suitable range (mass percentage chemical c...

Embodiment 3

[0048] The helical leaf guard plate made of a wear-resistant cast iron material is a kind of wear-resistant cast iron material in the present invention, which is composed of the following chemical components in mass percentage: C 2.1%, Si 0.9%, Mn 0.8%, Cr 25.5%, Ni 0.9%, P0.045%, S 0.05%, Ti 0.08%, V 0.44%, the balance is Fe and unavoidable impurities.

[0049] The manufacturing process of a spiral blade guard plate made of anti-wear cast iron material in this embodiment:

[0050] (1) According to the material composition requirements in this embodiment, a batching plan is formulated; various furnace materials are sequentially added to the intermediate frequency furnace for melting according to the requirements of the smelting process, that is, after power-on, pig iron, scrap steel, and ferrochrome are sequentially put into the furnace Heating and melting, adding nickel plate, ferrosilicon and ferromanganese after dissolving; (2), adding fine-grained ferrovanadium and ferroti...

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Abstract

The invention discloses a wear-resistant cast iron material, a preparation thereof and a helical blade guard plate made from the wear-resistant cast iron material. The wear-resistant cast iron material is composed of the following chemical components by mass percent: 2.0-3.3% of C, not larger than 1.2% of Si, not larger than 2.0% of Mn, 23-30% of Cr, 0.8-1.2% of Ni, not larger than 0.05% of P, not larger than 0.05% of S, 0.3-0.5% of V, 0.08-0.12% of Ti and the balance of Fe. The hardenability, toughness and wear resistance of the cast iron material are good, the three alloy elements Ni, V, Ti are added to further improve the wear resistance of the material and enhance the strength, hardenability and toughness of the material. The preparation method of the material is simple and the operation is convenient, thereby being conductive to the production, application and promotion of the material. The helical blade guard plate made from the wear-resistant cast iron material has good impact toughness and wear resistance, if being applied on a helical blade, the integral wear resistance and impact toughness of the helical blade are obviously improved, the service lives of the helical blade and a helical assembly are prolonged, and the cost is saved.

Description

technical field [0001] The invention relates to a metal material and its preparation method and application, in particular to a wear-resistant cast iron material, its preparation method and a helical blade guard made of the same. Background technique [0002] With the continuous improvement of the technical level, people have higher and higher requirements for the wear resistance, strength, toughness and plasticity of wear-resistant cast iron materials. Traditionally, wear-resistant steel has good toughness, but its wear resistance is poor; while high-chromium cast iron materials (such as: [0003] KmTBCr26) has excellent wear resistance, but due to its single chromium (Cr) alloying, the hardenability and toughness of cast iron are insufficient, and the crack tendency is large during casting and heat treatment, and early block and fracture are also prone to occur during use. [0004] In the field of mineral processing, spiral mixing and conveying equipment for materials, es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/08
Inventor 丁春明黄勇蒋兴德邵玉川陈焱
Owner SICHUAN HONGJIAN HEAVY MACHINERY MFG