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High-speed steel roll ring for hot-rolled seamless steel pipe and preparation method thereof

A seamless steel pipe and high-speed steel technology, applied in the field of steel pipe manufacturing, can solve the problems of affecting the appearance quality of seamless steel pipes, sticking together, and low hardness of roll rings, and achieve good economic and social benefits, increased production costs, and low The effect of production costs

Active Publication Date: 2020-05-15
安徽环渤湾高速钢轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the various roll rings developed at present generally have low hardness, poor wear resistance, and the roll ring is easy to adhere to the seamless steel pipe during the hot rolling process, which seriously affects the appearance quality of the seamless steel pipe.

Method used

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  • High-speed steel roll ring for hot-rolled seamless steel pipe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-speed steel roll ring for hot-rolled seamless steel pipes and a preparation method thereof are characterized in that they are smelted in a 500-kg medium-frequency induction furnace, and the specific preparation process steps are as follows:

[0021] ① Melt high-speed steel molten steel in an intermediate frequency induction furnace first, and control the chemical composition and mass fraction of high-speed steel molten steel at 3.22%C, 1.22%W, 2.39%Mo, 1.86%V, 12.44%Cr, 0.37%Mn, 0.87% Si, 0.29% Al, 0.032% S, 0.034% P, and the balance Fe. When the temperature of the molten steel reaches 1586°C, the molten steel is taken out of the furnace into a ladle, and multi-element alloy particles are pre-added in the ladle. The size of the multi-element alloy particles is 4- 6mm, the chemical composition and mass fraction of multi-element alloy particles are 6.04% Ce, 7.48% La, 10.10% Bi, 5.31% Sb, 3.54% Mg, 26.59% Si, the balance is Fe and unavoidable trace impurities, multi...

Embodiment 2

[0025] A high-speed steel roll ring for hot-rolled seamless steel pipes and a preparation method thereof are characterized in that they are smelted in a 1,000-kg medium-frequency induction furnace, and the specific preparation process steps are as follows:

[0026] ① Melt high-speed steel molten steel in an intermediate frequency induction furnace first, and control the chemical composition and mass fraction of high-speed steel molten steel at 3.45%C, 1.07%W, 2.61%Mo, 1.55%V, 12.67%Cr, 0.54%Mn, 0.63% Si, 0.41% Al, 0.028% S, 0.033% P, and the balance Fe. When the temperature of the molten steel reaches 1609°C, the molten steel is taken out of the furnace to the ladle, and multi-element alloy particles are pre-added in the ladle. The size of the multi-element alloy particles is 4- 6mm, the chemical composition and mass fraction of multi-element alloy particles are 7.71% Ce, 6.15% La, 11.29% Bi, 5.02% Sb, 4.25% Mg, 22.07% Si, the balance is Fe and unavoidable trace impurities, mul...

Embodiment 3

[0030] The high-speed steel roll ring for hot-rolled seamless steel pipes and its preparation method is characterized in that it is smelted in a 1500-kg medium-frequency induction furnace, and the specific preparation process steps are as follows:

[0031]① Melt high-speed steel molten steel in an intermediate frequency induction furnace first, and control the chemical composition and mass fraction of high-speed steel molten steel at 3.37%C, 1.17%W, 2.48%Mo, 1.69%V, 12.50%Cr, 0.46%Mn, 0.69% Si, 0.35% Al, 0.031% S, 0.025% P, and the balance Fe. When the temperature of the molten steel reaches 1597°C, the molten steel is released into the ladle, and multi-element alloy particles are pre-added in the ladle. The size of the multi-element alloy particles is 4- 6mm, the chemical composition and mass fraction of multi-element alloy particles are 6.93% Ce, 6.84% La, 10.79% Bi, 5.08% Sb, 3.74% Mg, 24.06% Si, the balance is Fe and unavoidable trace impurities, multi-element alloy The am...

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Abstract

The invention discloses a high-speed steel roller ring for hot-rolled seamless steel pipes and a preparation method of the high-speed steel roller ring, and belongs to the technical field of steel pipe manufacturing. High-speed molten steel is molten in a medium-frequency induction electric furnace, the chemical ingredients of the high-speed molten steel are adjusted to comprise 3.22-3.45% of C, 1.07-1.22% of W, 2.39-2.61% of Mo, 1.55-1.86% of V, 12.44-12.67% of Cr, 0.37-0.54% of Mn, 0.63-0.87% of Si, 0.29-0.41% of Al, less than 0.035% of S, less than 0.035% of P and the balance Fe, the moltensteel is discharged from the furnace into a steel ladle when the temperature of the molten steel reaches 1586-1609 DEG C, multicomponent alloy particles are added into the steel ladle in advance, particles containing silicon, calcium, barium and zinc are added along with the flow during molten steel casting, and the high-speed steel roller ring with the excellent performance can be obtained aftera casting is subjected to heat treatment and machined. The high-speed steel roller ring has good economic and social benefits when applied and popularized.

Description

technical field [0001] The invention discloses a high-speed steel roll ring and a preparation method thereof, in particular to a high-speed steel roll ring for hot-rolled seamless steel pipes and a preparation method thereof, and belongs to the technical field of steel pipe manufacturing. Background technique [0002] Seamless steel pipes play an important role in industrial and agricultural production and construction. Seamless steel pipes are steel pipes made of a single piece of metal with no seams on the surface, called seamless steel pipes. According to the production method, seamless steel pipes are divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, and jacking pipes. According to the cross-sectional shape, seamless steel tubes are divided into two types: round and special-shaped, and special-shaped tubes have various complex shapes such as square, oval, triangular, hexagonal, melon-shaped, star-shaped, and finned tubes. Among them, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C21D9/40C21D1/18C22C38/36C22C38/22C22C38/24C22C38/04C22C38/02C22C38/06C22C38/60
CPCC21D1/18C21D9/40C21D2211/008C22C33/06C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/36C22C38/60
Inventor 张政龙
Owner 安徽环渤湾高速钢轧辊有限公司