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

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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 pre

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

Experimental program
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Example Embodiment

[0028] Example 1

[0029] Reference attached figure 1 , This embodiment is to manufacture the Φ460 hot-rolled seamless steel pipe unit two-roll sizing machine or reducer composite particle strengthening roll. Weight 898kg.

[0030] The ratio of the composite strengthening particle elements of the roll in this embodiment adopts: TiC22.5kg, WC22.5kg, Ni powder 5kg, Nb powder 5kg, iron powder 35kg, bismuth powder 0.03kg, and antimony powder 0.015kg. The above-mentioned elements are stirred in a ball mill for 2 hours, mixed evenly, and then compressed into 5-10mm composite reinforced particle blocks for later use.

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

[0032] Conventional smelting ductile iron matrix metal melt, after 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 to strengthen t...

Example Embodiment

[0034] Example 2

[0035] Reference attached figure 2 , This embodiment is to manufacture a Φ250 hot-rolled seamless steel pipe unit three-roll sizing machine or reducer roll composite particle reinforced roll, weight 242kg.

[0036] The ratio of the composite strengthening particle elements of the roller adopts: TiC8kg, WC8kg, B4C8kg, Ni powder 2kg, Nb powder 2kg, industrial reduced iron powder 20kg, bismuth powder 0.03kg, and antimony powder 0.018kg. The above-mentioned elements are stirred in a ball mill for 2 hours to make them evenly mixed, and compressed into a 5-10mm composite reinforced particle block, and preheated to 350-400℃ for use; the chemical composition of the ductile iron matrix adopts: 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 conventional nodular cast iron base metal melt is smelted. After the smelting is completed, put the composite strengthening particle block preheated to 350~400℃ in the ladle, and th...

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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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