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Composite roller of particle-reinforced hot-rolled seamless steel pipe tandem mill and preparing method thereof

A technology of composite rolls and seamless steel pipes is applied in the field of roll manufacturing to meet the requirements of service conditions, improve service life, and improve the effect of spheroidization.

Active Publication Date: 2016-05-04
SHANDONG PROVINCE SIFANG TECHN DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a particle reinforced hot-rolled seamless steel pipe continuous rolling mill composite roll and its preparation method to solve many problems existing in the existing hot-rolled seamless steel pipe continuous rolling mill rolls

Method used

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  • Composite roller of particle-reinforced hot-rolled seamless steel pipe tandem mill and preparing method thereof
  • Composite roller of particle-reinforced hot-rolled seamless steel pipe tandem mill and preparing method thereof

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Experimental program
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Embodiment 1

[0022] Refer to the attached figure 1 and attached figure 2 , This embodiment is for the manufacture of Φ250 hot-rolled seamless steel pipe unit with three-roller G1 continuous rolls. The slab weight is 854kg, and the theoretical casting weight of the working layer of the roll body is 314kg.

[0023] The matrix composition of this embodiment is: C: 3.6%, Si: 2.1%, Mn: 0.32%, P: 0.017%, S: 0.014%, Cu: 0.25%, Mg: 0.05%; the ratio of composite particles is: TiC16kg, WC16kg, Ni powder 2kg, Nb powder 2kg, industrial reduced iron powder 28kg, bismuth powder 0.02kg, antimony powder 0.012kg. Put the above materials in a ball mill and stir for 2 hours to mix them uniformly to form a mixed material, press the mixed material into a 5-10mm composite particle block, and preheat it to 350-400°C for use.

[0024] A steel parting ring 3 is designed to separate the mold cavity of the composite roll billet, and is prepared into two parts: the roll body working layer 1 and the mandrel 4, and...

Embodiment 2

[0029] refer to figure 1 and figure 2 , This embodiment is to use different proportions of matrix components to manufacture Φ250 hot-rolled seamless steel pipe unit three-roller G3 continuous rolls. The weight of the slab is 845kg, and the theoretical casting weight of the first part of the working layer of the roll body is 310kg.

[0030] The matrix components in this embodiment are: C: 3.7%, Si: 1.8%, Mn: 0.35%, P: 0.015%, S: 0.010%, Cu: 0.20%, Mg: 0.045%; the composite particles are respectively: TiC8kg, WC8kg, Ni powder 1kg, Nb powder 1kg, industrial reduced iron powder 14kg, bismuth powder 0.018kg, antimony powder 0.014kg; the above-mentioned raw materials were put into a ball mill and stirred for 2 hours to make them evenly mixed, and pressed into a compound of 5-10 mm. The particles are small pieces, and these small pieces are preheated to 350-400 ℃ for use.

[0031] A steel parting ring 3 is used to separate the casting billet cavity into two parts, the roll body w...

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Abstract

The invention discloses a composite roller of a particle-reinforced hot-rolled seamless steel pipe tandem mill and a preparing method thereof. Composite particles adopted by the composite roller consist of reinforcing particles, an active wetting agent and a matrix reinforcer. Through reinforcing nodular cast iron matrix metal melt and adopting a technical method separately casting two parts, the composite roller of the particle-reinforced hot-rolled seamless steel pipe tandem mill is cast. Through carrying out isothermal quenching and processing on the composite roller, the composite roller of the seamless steel pipe tandem mill, which is high in strength and high in tenacity, is obtained. The composite roller is resistant to wear and resistant to impact, the service life of the roller is prolonged by more than 1.5 times, the production cost is reduced, and the production efficiency and the economic benefit of steel pipe production enterprises are improved.

Description

technical field [0001] The invention relates to a roll manufacturing technology, in particular to a composite roll of a particle-strengthened hot-rolled seamless steel pipe continuous rolling mill and a preparation method thereof. Background technique [0002] Rolls are an important bulk consumption tool in steel rolling production. The quality and service life of the rolls are the prerequisites that restrict the development level of a country's steel rolling technology. In the foreseeable future, the continuous deformation steel rolling technology characterized by rolling will still be the core technology of steel forming. my country has become the world's largest producer of seamless steel pipes, and the quality and service life of seamless steel pipe continuous rolling mill rolls are also a major bottleneck restricting the production of seamless steel pipes. [0003] Hot continuous rolling seamless steel pipe is to roll the perforated thick-walled capillary into a thin-w...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/04C21D1/607C21D1/613B22D25/00
CPCB22D25/00C21D1/607C21D1/613C22C37/04C22C37/10
Inventor 袁厚之张凝刘行一王平
Owner SHANDONG PROVINCE SIFANG TECHN DEV
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