A kind of wear-resistant heat-resistant alloy material and preparation method thereof

A heat-resistant alloy and casting technology, which is applied to wear-resistant and heat-resistant alloy materials and their preparation, and the field of wear-resistant and heat-resistant alloys, can solve the problems of difficult control of production process, poor thermal shock resistance, difficult material recovery, etc. The effect of reducing the dendrite structure, improving the properties of heat-resistant steel, and improving heat resistance

Inactive Publication Date: 2015-12-30
GUANGDONG INST OF MATERIALS & PROCESSING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent has many elements, the production process is difficult to control, and it brings difficulties to material recycling
[0008] Patent CN101649424A (a new type of heat-resistant steel) authorized by the State Intellectual Property Office of China, this patent C: 0.65%-0.75%, Si: 0.7%-1.0%, Mn: 1.0%-1.2%, Cr: 18%-29% , Ni: 20.5%-21%, Mo: 0.55%-0.6%, others contain Al, V, Co, Ti, Nb, W, Bi, Ca, B, etc. From the composition, it can be seen that the content of Ni and Mo in this patent is high, High production cost, high C content, poor thermal shock resistance
[0009] Chinese invention patent CN102181746A adopts the vibratory solidification method of lost foam casting to refine the grains of castings, and the effect is good, but the lost foam method needs to prepare foam, etc., the process is long and the cost is high
[0010] Chinese invention patent CN102744367A adopts the vibratory solidification method of lost pattern shell casting to refine the crystal grains, and the effect is good, but the lost foam shell method needs to prepare foam, shell mold, etc., the process is long and the cost is high

Method used

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  • A kind of wear-resistant heat-resistant alloy material and preparation method thereof
  • A kind of wear-resistant heat-resistant alloy material and preparation method thereof
  • A kind of wear-resistant heat-resistant alloy material and preparation method thereof

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preparation example Construction

[0035] The preparation method of the wear-resistant and heat-resistant alloy material of the present invention comprises the following steps:

[0036] 1) Put waste stainless steel, low-carbon ferrochrome, nickel plate, ferrosilicon, ferromanganese, and ferrotungsten in an induction furnace for smelting; use ferrosilicon, ferromanganese, and aluminum precipitation deoxidation, and use silicon-calcium diffusion deoxidation for refining. 1600°C-1650°C, place ferroniobium and Y-based rare earths in a ladle baked to 800°C, the particle size of ferroniobium and Y-based rare earths is 1mm-3mm;

[0037]2) Quartz sand is used for the selection of the mold, and water glass is used as the binder, carbon dioxide is used as the curing agent, and the surface of the mold is painted with zircon powder alcohol-based paint;

[0038] 3) Fix the casting mold to the box and lock the box on the vibration device platform, turn on the vibration device, pour the molten metal, the pouring temperature i...

Embodiment 1

[0043] 1. Composition: C: 0.3%, Cr: 24%, Ni: 11.5%, Si: 2.6%, Mn: 2.0%, P and S≤0.03%, W: 0.6%, Nb: 0.1%, Y-based rare earth 0.2 %.

[0044] 2. Put waste stainless steel, low-carbon ferrochrome, nickel plate, ferrosilicon, ferromanganese, and ferrotungsten in an induction furnace for smelting; use ferrosilicon, ferromanganese, and aluminum precipitation deoxidation, and use silicon-calcium diffusion deoxidation for refining. 1620°C, put ferroniobium and Y-based rare earths in a ladle with a particle size of 1-3mm, and bake the ladle to no less than 800°C.

[0045] 3. The casting mold uses quartz sand and water glass as binder, carbon dioxide solidifies, and the surface of the casting mold is painted with zircon powder, and the box is closed and locked.

[0046] 4. Place the locked mold and the sand box on the platform of the vibrating device, turn on the vibrating equipment, pour molten steel, and turn off the vibration after the solidification is complete. Vibration paramete...

Embodiment 2

[0050] 1. Composition: C: 0.25%, Cr: 25%, Ni: 12%, Si: 2.2%, Mn: 1.8%, P and S≤0.03%, W: 0.7%, Nb: 0.12%, Y-based rare earth 0.25 %.

[0051] 2. Put waste stainless steel, low-carbon ferrochrome, nickel plate, ferrosilicon, ferromanganese, and ferrotungsten in an induction furnace for smelting; use ferrosilicon, ferromanganese, and aluminum precipitation deoxidation, and use silicon-calcium diffusion deoxidation for refining. Place ferroniobium and Y-based rare earths in a ladle at 1610°C to a depth of 1-3mm, and bake the ladle to no less than 800°C.

[0052] 3. The casting mold uses quartz sand and water glass as binder, carbon dioxide solidifies, and the surface of the casting mold is painted with zircon powder, and the box is closed and locked.

[0053] 4. Place the locked mold together with the sand box on the platform of the vibrating device, turn on the vibrating equipment, pour molten steel, and turn off the vibration after the solidification is complete. Vibration par...

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Abstract

The invention discloses a wear-resistant heat-resistant alloy material and a preparation method thereof, and in the material, high wear-resistant hard phase is uniformly distributed on a high temperature oxidation resistant fine-grain austenite matrix. The austenite matrix is obtained by adding Cr and Ni, the Y-based rare earth is added to closely combine with the matrix while oxide compactness is formed, the W is added to form W to displace Fe and Cr elements in (Cr, Fe)7C3 and (Cr, Fe)23C6 and to solid-dissolve in the (Cr, Fe)7C3 and (Cr, Fe)23C6 and improve the (Cr, Fe)7C3 and (Cr, Fe)23C6 hardness; the Nb is added to form a hard spot compound; and meanwhile, the Nb is used as a crystal core to refine the grain, the vibration solidification method is combined to eliminate the dendrite and improve the carbide form so as to further refine the grain. The heat-resistant steel performance can be obviously improved by adopting the invention, wherein the hardness can be improved by 10-15%, the strength can be improved by 10-18%, the oxidation increase is reduced by 18-20%, and the service life is improved by 20-25% at 1000 DEG.C.

Description

technical field [0001] The invention belongs to the field of wear-resistant and heat-resistant steel materials, and relates to wear-resistant and heat-resistant alloys, in particular to a wear-resistant and heat-resistant alloy material and a preparation method thereof. Background technique [0002] Key components of industrial equipment such as electric power, metallurgy, cement, building materials, and chemical industry are subject to high-temperature oxidation and medium erosion and wear conditions. For example, the flame nozzle in the power industry is subjected to coal erosion under high-temperature conditions; The high temperature of 1000 ℃ bears the wear of slag at the same time; the grate plate of cement industry bears the scour and wear of cement under the high temperature condition of 1000 ℃; the chemical petroleum cracking pipe bears the scour of the medium in the high temperature environment of nearly 1000 ℃, etc. The failure mechanism of the above components is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/48
Inventor 郑开宏高义民皇志富邢建东李烨飞徐静
Owner GUANGDONG INST OF MATERIALS & PROCESSING
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