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Reinforced wear-resistant roller with in-situ composite carbide granules and preparation method thereof

A technology of carbide particles and in-situ compounding, which is applied in the field of steel rolling, can solve the problems of aggravated roll wear, agglomeration of wear-resistant particles, and insufficient strengthening effect of wear-resistant particles.

Active Publication Date: 2020-10-23
枣庄瑞兴机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, adding wear-resistant particles directly into the molten metal is prone to agglomeration of wear-resistant particles, and the strengthening effect of wear-resistant particles cannot be fully exerted. Although electromagnetic stirring, mechanical vibration or ultrasonic vibration are used, it is expected to make Uniform distribution of wear-resistant particles
However, there is an interface between the added wear-resistant particles and the metal matrix, and the bonding strength between the wear-resistant particles and the metal matrix is ​​low. During use, the wear-resistant particles are prone to peeling off, and the peeled particles adhere to the surface of the roll, which in turn aggravates the wear of the roll. wear and tear

Method used

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  • Reinforced wear-resistant roller with in-situ composite carbide granules and preparation method thereof
  • Reinforced wear-resistant roller with in-situ composite carbide granules and preparation method thereof
  • Reinforced wear-resistant roller with in-situ composite carbide granules and preparation method thereof

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Effect test

Embodiment 1

[0029] An in-situ composite carbide particle reinforced wear-resistant roll and a preparation method thereof, characterized in that (Nb,Ti)C composite carbide particles are generated in-situ in the roll matrix and evenly distributed in the roll matrix to promote the wear resistance of the roll Significantly improved, the specific preparation process steps are as follows:

[0030] ① Melt molten iron containing elements such as niobium, chromium, cobalt, manganese and nickel in a 1000 kg intermediate frequency induction furnace, and control the chemical composition and mass fraction of the molten iron in the furnace to 3.63%C, 4.74%Mn, 2.69%Co, 12.27% Cr, 2.83% Nb, 0.86% Si, 1.16% Al, 3.29% Ni, 0.027% S, 0.030% P, the balance Fe; and the temperature of the molten iron is raised to 1569°C, and then 9.5% of the mass fraction of the molten iron in the furnace is added FeTi70 (the chemical composition and mass fraction of FeTi70 is 70.82% Ti, 1.95% Al, 0.25% Si, and the balance Fe),...

Embodiment 2

[0035] An in-situ composite carbide particle reinforced wear-resistant roll and a preparation method thereof, characterized in that (Nb,Ti)C composite carbide particles are generated in-situ in the roll matrix and evenly distributed in the roll matrix to promote the wear resistance of the roll Significantly improved, the specific preparation process steps are as follows:

[0036] ① Melt molten iron containing elements such as niobium, chromium, cobalt, manganese and nickel in a 1500 kg intermediate frequency induction furnace, and control the chemical composition and mass fraction of the molten iron in the furnace to 3.78%C, 4.51%Mn, 2.79%Co, 12.06% Cr, 2.90% Nb, 0.77% Si, 1.27% Al, 3.07% Ni, 0.025% S, 0.032% P, the balance Fe; and raise the temperature of the molten iron to 1575°C, and then add 10% of the mass fraction of the molten iron in the furnace FeTi70 (the chemical composition and mass fraction of FeTi70 is 70.95% Ti, 0.97% Al, 0.28% Si, and the balance Fe), FeTi70 is...

Embodiment 3

[0041] An in-situ composite carbide particle reinforced wear-resistant roll and a preparation method thereof, characterized in that (Nb,Ti)C composite carbide particles are generated in-situ in the roll matrix and evenly distributed in the roll matrix to promote the wear resistance of the roll Significantly improved, the specific preparation process steps are as follows:

[0042] ① Melt molten iron containing elements such as niobium, chromium, cobalt, manganese and nickel in a 1000kg medium-frequency induction furnace, and control the chemical composition and mass fraction of the molten iron in the furnace to 3.44%C, 4.86%Mn, 2.55%Co, 12.39% Cr, 2.74% Nb, 0.95% Si, 1.27% Al, 3.07% Ni, 0.028% S, 0.031% P, the balance Fe; and the temperature of the molten iron is raised to 1558°C, and then add 9% of the mass fraction of the molten iron in the furnace FeTi70 (the chemical composition and mass fraction of FeTi70 is 70.36%Ti, 2.82%A1, 0.27%Si, the balance Fe), FeTi70 was baked at ...

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Abstract

The invention relates to a reinforced wear-resistant roller with in-situ composite carbide granules and a preparation method thereof, and belongs to the technical field of steel rolling. The preparation method comprises the steps of generating (Nb, Ti) C composite carbide granules in situ in a roller matrix; smelting molten iron containing 3.44-3.78% of C, 12.06-12.39% of Cr, 2.74-2.90% of Nb, 0.77-0.95% of Si, 1.03-1.27% of Al, 2.55-2.79% of Co, 4.51-4.86% of Mn and 3.07-3.38% of Ni in a medium-frequency induction furnace, heating the molten iron to 1558-1575 DEG C, and then adding FeTi70; when the temperature drops to 1447-1466 DEG C, pouring the molten iron into a casting mould; and in the molten iron pouring process, adding silicon calcium barium alloy with the particle size being 2-4mm along with molten iron flow. After casting, processing and heat treatment, the roller has excellent wear resistance and a good use effect.

Description

technical field [0001] The invention discloses a wear-resistant roll and a preparation method thereof, in particular relates to an in-situ composite carbide particle reinforced wear-resistant roll and a preparation method thereof, and belongs to the technical field of steel rolling. Background technique [0002] Rolls are key spare parts in the production process of hot-rolled strip steel. The commonly used types of rolls for hot-rolled strip steel are nickel-chromium-molybdenum infinite chilled cast iron rolls and high-chromium cast iron rolls. Among nickel-chromium-molybdenum infinite chilled cast iron rolls, due to Graphite is in the form of flat strips, and the carbides are in a network structure, so the matrix strength is relatively low and the service life is not long. Secondly, due to the network structure of carbides and the boundary effect of graphite holes, the thermal crack resistance of the material is also low. It is not good. During the rolling process of the s...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08C22C33/08C21D1/607C21D1/30
CPCC21D1/30C21D1/607C21D2211/001C21D2211/008C22C33/08C22C37/08C22C37/10
Inventor 徐继平符寒光
Owner 枣庄瑞兴机械制造有限公司
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