Abrasion-resistant alloy cast iron material with high hardness for chute lining plate, and preparation method thereof

A wear-resistant alloy, high-hardness technology, applied in the field of metal wear-resistant materials, can solve the problem of not being able to meet high hardness and high impact toughness at the same time, and achieve the effects of increasing hardness, enhancing stability, and improving red hardness

Inactive Publication Date: 2013-05-08

驻马店市三山耐磨材料有限公司

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AI-Extracted Technical Summary

Problems solved by technology

Cast iron with this chemical composition is used for subsequent heat treatment, and the maximum hardness can r...

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Method used

As can be seen from table 1, the present invention does not add Ni element, by controlling the add-on of elements such as Mo, Cu, V, Ti, and adds B element, adopts light ...

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Abstract

The invention discloses an abrasion-resistant alloy cast iron material with high hardness for a chute lining plate, and a preparation method thereof. The abrasion-resistant alloy cast iron material comprises the following chemical components in percentage by weight: 2.6-3.0% of C, 0.3-1.0% of Si, 0.5-1.0% of Mn, 21-23% of Cr, 0.8-1.2% of Mo, 0.8-1.2% of Cu, 0.6-0.9% of W, 0.1-0.2% of V, 0.06-0.12% of Ti, 0.001-0.003% of B, 0.04-0.08% of RE, 0.04-0.08% of Y, 0.04-0.08% of Al, less than or equal to 0.06% of S, less than or equal to 0.06% of P and the balance of Fe. According to the abrasion-resistant alloy cast iron material provided by the invention, the hardness of the abrasion-resistant alloy cast iron material is improved by controlling the content of chromium element and the proportion of Cr/C. Noble metal elements such as Mo, W, V, Ti and Cu are added into the cast iron, and through complex use of the noble metal elements, the stability of austenite is enhanced, grains are refined, and the high temperature stability and red hardness of carbides are improved, so that the hardness of the cast iron material provided by the invention is further improved, and the abrasive resistance is correspondingly improved. The average hardness of the alloy cast iron material provided by the invention can reach over HRC63, and the impact toughness aK of the alloy cast iron material can reach 5J/cm<2>.

Technology Topic

CrystalliteCast iron +10

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Examples

Experimental program(9)
Comparison scheme(1)

Example Embodiment

[0033] Example 1

[0034] The high-hardness wear-resistant alloy cast iron material for the chute liner of this embodiment is composed of the following mass fractions of chemical composition: C2.7%, Si0.4%, Mn0.9%, Cr21.5%, Mo1.0%, Cu1.1%, W0.6%, V0.2%, Ti0.07%, B0.001%, RE0.05%, Y0.05%, Al0.07%, S≤0.06%, P≤0.06%, The rest is Fe.

[0035] The preparation method of the high hardness and wear-resistant alloy cast iron material for the chute liner of this embodiment includes the following steps:

[0036] 1) Add scrap steel, ferrochrome, ferromolybdenum, ferro tungsten, waste brass, ferromanganese, ferrovanadium, ferro-titanium, and ferro-boron to the furnace according to the formula to smelt into molten iron. The smelting temperature is 1520℃;

[0037] 2) Add rare earth silicon with a particle size of 5mm to the molten iron according to the formula for a one-time modification treatment, and pour out the molten iron when the temperature measured by the thermometer is 1520-1560℃;

[0038] 3) Add the heavy rare earth Y with a particle size of 5mm to the molten iron according to the formula amount for secondary modification, calm, and cast when the temperature measured by the thermometer is 1520-1560°C, and the casting temperature is 1400°C.

[0039] A set of standard chute liners are poured along with the furnace, and a Y-shaped test block attached is poured. Open the box after 8h, cut off the riser and gate of the casting, and clean up flash and burrs. Heat the casting to 700°C for 2h, then heat it to 1000°C for 6h, and then cool it to room temperature. Then temper the cooling casting with a tempering temperature of 350°C, tempering holding time for 6h, and then air cooling out of the furnace.

Example Embodiment

[0040] Example 2

[0041] The high-hardness and wear-resistant alloy cast iron material for the chute liner of this embodiment is composed of the following mass fractions of chemical components: C2.6%, Si0.65%, Mn1.0%, Cr22.5%, Mo1.1%, Cu1.0%, W0.8%, V0.1%, Ti0.09%, B0.003%, RE0.07%, Y0.07%, Al0.04%, S≤0.06%, P≤0.06%, the rest For Fe.

[0042] The preparation method of the high hardness and wear-resistant alloy cast iron material for the chute liner of this embodiment includes the following steps:

[0043] 1) Add scrap steel, ferrochrome, ferromolybdenum, ferro tungsten, waste brass, ferromanganese, ferro-vanadium, ferro-titanium, and ferro-boron to the furnace according to the formula to smelt into molten iron. The melting temperature is 1540℃;

[0044] 2) Add rare earth silicon with a particle size of 8mm to the molten iron according to the formula for a one-time modification treatment, and pour out the molten iron when the temperature measured by the thermometer is 1520-1560°C;

[0045] 3) Add heavy rare earth Y with a particle size of 3mm to the molten iron according to the formula amount for secondary modification, calm, and cast when the temperature measured by the thermometer is 1520-1560°C, and the casting temperature is 1380°C.

[0046] A set of standard chute liners are poured along with the furnace, and a Y-shaped test block attached is poured. Open the box after 7 hours, cut off the riser and gate of the casting, and clean up flash and burrs. Heat the casting to 650°C for 3 hours, then heat to 1025°C for 7 hours, and then air-cooled to room temperature; then temper the cooled casting with a tempering temperature of 400°C, tempering holding time for 5 hours, and then air cooling out of the furnace.

Example Embodiment

[0047] Example 3

[0048] The high-hardness wear-resistant alloy cast iron material for the chute liner of this embodiment is composed of the following mass fractions of chemical composition: C3.0%, Si1.0%, Mn0.75%, Cr23%, Mo1.2%, Cu0. 8%, W0.75%, V0.19%, Ti0.12%, B0.0028%, RE0.04%, Y0.04%, Al0.08%, S≤0.06%, P≤0.06%, the rest are Fe.

[0049] The preparation method of the high hardness and wear-resistant alloy cast iron material for the chute liner of this embodiment includes the following steps:

[0050] 1) Add scrap steel, ferrochrome, ferromolybdenum, ferro tungsten, waste brass, ferromanganese, ferrovanadium, ferro-titanium, and ferro-boron to the furnace according to the formula to smelt into molten iron at a smelting temperature of 1560℃;

[0051] 2) Add rare earth silicon with a particle size of 6mm to the molten iron according to the formula amount for a one-time modification treatment, and pour out the molten iron when the temperature measured by the thermometer is 1520-1560°C;

[0052] 3) Add heavy rare earth Y with a particle size of 4mm to the molten iron according to the formula amount for secondary modification, calm, and cast when the temperature measured by the thermometer is 1520-1560°C, and the casting temperature is 1400°C.

[0053] A set of standard chute liners are poured along with the furnace, and a Y-shaped test block attached is poured. Open the box after 6h, cut off the riser and gate of the casting, and clean up flash and burrs. Heat the casting to 750°C for 1 hour, then heat it to 1050°C for 5 hours, and then air-cool it to room temperature; then temper the cooled casting with a tempering temperature of 250°C, tempering holding time for 7 hours, and then air cooling out of the furnace.

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Abrasion-resistant alloy cast iron material with high hardness for chute lining plate, and preparation method thereof

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Example Embodiment

Example Embodiment

Example Embodiment

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