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Composite particle reinforced roller of hot-rolling seamless steel pipe sizing mill or reducing mill and preparation method thereof

A technology of composite particles and seamless steel pipes is applied in the field of roll manufacturing to achieve the effects of improving spheroidizing effect, improving service life, and reducing manufacturing and production costs.

Active Publication Date: 2016-06-01
SHANDONG SIFANG STEEL PIPE EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a hot-rolled seamless steel pipe sizing machine or reducing machine composite particle reinforced roll and a preparation method thereof to solve many problems existing in the existing hot-rolled seamless steel pipe sizing machine or reducing machine rolls

Method used

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  • Composite particle reinforced roller of hot-rolling seamless steel pipe sizing mill or reducing mill and preparation method thereof
  • Composite particle reinforced roller of hot-rolling seamless steel pipe sizing mill or reducing mill and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Refer to attached figure 1 , This embodiment is to manufacture Φ460 hot-rolled seamless steel pipe unit two-roller sizing mill or reducing mill compound particle reinforced roll. Weight 898kg.

[0030] The proportions of the composite strengthening particle elements of the roll in this embodiment are as follows: 22.5kg TiC, 22.5kg WC, 5kg Ni powder, 5kg Nb powder, 35kg iron powder, 0.03kg bismuth powder, and 0.015kg antimony powder. The above elements are stirred in a ball mill for 2 hours, mixed evenly, and then pressed into 5-10 mm composite strengthening particle blocks for use.

[0031] The composition of the ductile iron matrix is: C: 3.4%, Si: 1.8%, Mn: 0.30%, P: 0.017%, S: 0.014%, Cu: 0.40%, Mg: 0.06%.

[0032] Conventional smelting of ductile iron matrix metal melt, after the smelting is completed, put the composite strengthening particle block preheated to 350-400 ℃ in the ladle, and then pour the matrix metal melt into the ladle, so that the matrix metal mel...

Embodiment 2

[0035] Refer to attached figure 2 , This embodiment is to manufacture Φ250 hot-rolled seamless steel pipe unit three-roll sizing mill or reducing mill roll compound particle reinforced roll, weighing 242kg.

[0036] The ratio of the composite strengthening particle elements of the roll adopts: TiC8kg, WC8kg, B4C8kg, Ni powder 2kg, Nb powder 2kg, industrial reduced iron powder 20kg, bismuth powder 0.03kg, antimony powder 0.018kg. Stir the above elements in a ball mill for 2 hours to make them evenly mixed, press them into 5-10mm composite reinforced particle blocks, and preheat them to 350-400°C for use; the chemical composition of the ductile iron matrix is: C: 3.6%, Si : 2.1%, Mn: 0.32%, P: 0.017%, S: 0.014%, Cu: 0.25%, Mg: 0.05%.

[0037] After that, the smelting of the conventional nodular cast iron matrix metal melt is carried out. After the smelting is completed, put the composite strengthened particle block preheated to 350-400°C in the ladle, then pour the matrix met...

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Abstract

The invention discloses a composite particle reinforced roller of a hot-rolling seamless steel pipe sizing mill or reducing mill and a preparation method thereof. Composite particles are composed of hardening particles, active wetting agents and matrix reinforcing agents. The composite particle reinforced roller of the sizing mill or reducing mill is cast after nodular cast iron matrix molten metal is reinforced; and the high-strength and high-toughness composite particle reinforced roller is obtained by conducting isothermal quenching and machining on the roller. The composite particle reinforced roller is resistant to abrasion and impact; the service life of the roller is prolonged by over two times; the production cost is lowered; the production efficiency of a steel pipe production enterprise is improved, and economic benefits of the steel pipe production enterprise are increased.

Description

technical field [0001] The invention relates to the technical field of roll manufacturing, in particular to a composite particle reinforced roll for a hot-rolled seamless steel pipe sizing machine or reducing machine and a preparation method thereof. Background technique [0002] my country is the world's largest producer of steel pipes, accounting for 1 / 2 of the world's total output. The sizing and reducing of the steel pipe is the last heat deformation process in the production of hot-rolled seamless steel pipe. Its main function is to eliminate the inconsistency of the outer diameter of the empty tube caused by the rolling process of the previous process, so as to improve the outer diameter accuracy and roundness of the hot-rolled finished tube. The sizing and reducing process of seamless steel pipe is a multi-stand continuous rolling process of steel pipe without mandrel. [0003] Sizing is to roll the steel pipe to a certain required dimensional accuracy and roundness...

Claims

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Application Information

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IPC IPC(8): B21B27/00B23P15/00C22C37/10C21D9/38C21D1/20
CPCB21B27/00B23P15/00C21D1/20C21D9/38C21D2211/002C22C37/10
Inventor 袁厚之张凝刘行一王平
Owner SHANDONG SIFANG STEEL PIPE EQUIP MFG
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