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Cr-free high boron iron-based wear-resisting dual-liquid dual-metal compound hammerhead and manufacturing method thereof

A composite hammer head and bimetallic technology, applied in grain processing, etc., can solve the problems of weak market competitiveness, high Cr content, high production cost, etc., and achieve the effects of easy promotion and application, increased service life, and low price

Inactive Publication Date: 2012-01-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hammer head is made of high chromium cast iron with high Cr content, which also increases the cost
[0006] It can be seen that the wear-resistant part of the bimetallic composite hammer head is based on the addition of Cr, the production cost is high, and the market competitiveness is weak

Method used

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  • Cr-free high boron iron-based wear-resisting dual-liquid dual-metal compound hammerhead and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of the hammer head wear-resistant layer: Put the scrap steel into an intermediate frequency induction furnace for smelting. After the molten steel is melted, add ferro-boron to continue smelting, and control the chemical composition of the molten steel to C 0.3%, B 4.5%, Si 0.4%, Mn 0.2 %, S 0.03%, P 0.01%, the rest is Fe (weight percentage); after re-dissolving, add 0.3% of the molten steel weight Al for deoxidation, slag off the furnace at 1600°C, and let stand and cool to 1480°C after leaving the furnace ; Pouring the sand mold through the runner 5, stop pouring after the molten steel flows out of the overflow port 3.

[0021] (2) Preparation of the toughness layer of the hammer handle: the scrap steel is used as a raw material to be smelted in an intermediate frequency furnace. The test found that the carbon content of the molten steel is 0.2%, and pig iron is added to adjust the carbon content to 0.3%. After the molten steel is melted, add 0.1% of the m...

Embodiment 2

[0023] (1) Preparation of the hammer head wear-resistant layer: Put the scrap steel into an intermediate frequency furnace for smelting. After the molten steel is melted, add ferroboron to continue smelting, and control the composition of the molten steel to C 0.7%, B 2.1%, Si 0.2%, Mn 0.4%, S 0.04%, the rest is Fe (weight percentage); after re-dissolving, add 0.2% Al of molten steel for deoxidation, slag off the furnace at 1573°C, and let it stand and cool to 1480°C after leaving the furnace; pouring through runner 5 In the sand mold, after the molten steel flows out of the overflow port 3, stop pouring.

[0024] (2) Preparation of the toughness layer of the hammer shank: use scrap steel as the raw material and put it into the melting furnace to smelt. The carbon content of the molten steel is determined to be 0.45%. After the molten steel is melted, 0.2% of the molten steel weight is added for deoxidation, and the slag is removed at 1565 ℃ out of the furnace; after the hammer h...

Embodiment 3

[0026] (1) Preparation of the hammer head wear-resistant layer: Put the scrap steel into an intermediate frequency induction furnace for smelting. After the molten steel is melted, add ferroboron to continue smelting, and control the chemical composition of the molten steel to C 1.0%, B 1.0%, Si 0.3%, Mn 0.3 %, P 0.02%, the rest is Fe (weight percentage); after re-dissolving, add 0.1% of the molten steel weight Al for deoxidation, slag off the furnace at 1600°C, and stand still to 1500°C after leaving the furnace; pouring through runner 5 In the sand mold, after the molten steel flows out of the overflow port 3, stop pouring.

[0027] (2) Preparation of the toughness layer of the hammer handle: use scrap steel as the raw material to put it in the melting furnace for smelting, check that the carbon content of the molten steel is 0.7%, add low-carbon steel to adjust the carbon content to 0.55%, and after the molten steel is melted, add the molten steel 0.3% Al is deoxidized, and th...

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Abstract

The invention relates to a Cr-free high boron iron-based wear-resisting dual-liquid dual-metal compound hammerhead and a manufacturing method thereof, belonging to the technical field of manufacturing of metal wear-resisting materials. In the invention, a Cr-free high boron iron-based wear-resisting alloy is taken as a wear-resisting layer of the hammerhead, carbon steel is taken as a tough layer of a hammer handle, and the wear-resisting layer of the dual-liquid dual-metal compound hammerhead comprises the following chemical components in percentage by weight: 0.3-1.0 percent of C, 1.0-4.5 percent of B, 0.3-0.4 percent of Si, 0.2-0.4 percent of Mn, less than 0.05 percent of S, less than 0.05 percent of P and the balance of Fe. In the method, dual-liquid dual pouring gates are adopted for pouring, the wear-resisting layer of the hammerhead is poured firstly, the tough layer of the hammer handle is poured secondly, and the size ratio of the hammerhead to the hammer handle is controlled through an overflow port. The dual-metal compound hammerhead has high integral associativity, long service life, low production cost and simple process.

Description

Technical field [0001] The invention relates to a two-liquid bimetal composite hammer head of Cr-free high-boron iron-based wear-resistant alloy and carbon steel and a preparation method thereof, and belongs to the field of metal wear-resistant material manufacturing. Background technique [0002] Crushers are widely used in mining, metallurgy, cement and other industries. The hammer is the main wear-resistant part in the crusher and consumes a lot of money. With the soaring prices of alloying elements of Cr, Mo, and V, the use cost of the hammer is increased. [0003] Patent CN86106682A discloses the bimetal composite casting of white cast iron and cast steel. It adopts two composite casting methods of "inlaid casting" and "dual liquid", and adopts self-made SIV bimetallic bonding site protective agent, which protects the bonding site. Cleaning at high temperature prevents high-temperature oxidation and promotes heat exchange between the two materials, facilitating the firm combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C13/28C22C38/04C22C33/04B22D19/16
Inventor 何正员刘美红蒋业华黎振华周荣锋周荣
Owner KUNMING UNIV OF SCI & TECH
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