High-strength copper alloy for thin-belt continuous casting crystallization roller and method for manufacturing same

A technology for continuous casting crystallization and manufacturing method, which is applied in the field of alloys for thin strip continuous casting crystallization rolls, and can solve the problems such as the inability to meet the strength requirements of thin strip continuous casting crystallization rolls, the reduction of strength, and the increase of electrical conductivity.

Active Publication Date: 2007-09-26
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the alloying theory, the higher the degree of alloying, the higher the strength of the alloy, but the poorer thermal conductivity and electrical conductivity; on the contrary, the higher the electrical conductivity, the lower the strength
The strength HBS120-135Mpa of Cu-Ag alloy and Cr-Zr-Cu and other alloy series widely used in continuous casting crystallizers is far from meeting the strength requirements of thin strip continuous casting crystal rolls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Cast an alloy consisting of Ni: 1.5%; Si: 0.1%; Zr: 0.15%; Cr: 0.2%; Sn: 0.08; Fe+Co+Mg<0.1%, and the rest is Cu, into a steel ingot at a temperature of 1100°C In the mold, cast an ingot, heat the ingot in a heating furnace at 880°C for 2 hours, then hot forge, the compression ratio of hot forging is 45%; quench the billet after hot forging; and solid solution treatment at 950°C; The treatment time is 8 hours; the solid solution treated billet is quenched; then subjected to 30% cold deformation; and aged at 450°C for 24 hours; the performance hardness of the alloy is HB: 210, and the electrical conductivity: 50%.

Embodiment 2

[0042] The composition is Ni: 2.5%; Si: 0.05%; Zr: 0.1%; Cr: 0.2%; Sn: 0.05%; The ingot is cast into an ingot in a steel ingot mold, and the ingot is heat-forged in a heating furnace at 950°C for 3 hours and then hot-forged. The compression ratio of hot forging is greater than 40%; the billet after hot forging is quenched; and it is solution treated at 1000°C; The treatment time is 5 hours; the solid solution treated billet is quenched; then it is subjected to cold deformation greater than 20%; then it is aged at 450°C for 12 hours; the cold deformation is greater than 20%; and it is aged at 550°C for 12 hours; The performance hardness HB of the obtained alloy is 212, and the electrical conductivity is 54%.

Embodiment 3

[0044] The composition is Ni: 1%; Si: 0.1%; Zr: 0.2%; Cr: 0.3%; Sn: 0.05%; In the steel ingot mould, the ingot is cast as an ingot, and the ingot is hot-forged in a heating furnace at 900°C for 3 hours, and the compression ratio of the hot forging is greater than 40%; the billet after hot forging is quenched; and solid solution at 980°C Treatment; the treatment time is 5 hours; the solution-treated billet is quenched; at 480°C, heat preservation for 30 hours for aging treatment; then cold deformation of more than 20%; the performance hardness of the alloy is HB: 203, and the electrical conductivity: 56%.

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PUM

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Abstract

The invention discloses a high-strength and high-conductive copper alloy of continuous casting thin-belt crystal roll, which comprises the following parts: 1-2.5% Ni, 0.05-0.2% Si,0.05-0.2% Zr, 0.2-0.4% Cr, 0.05-0.1% Sn, one or more of Fe, Co and Mg with total quantity less than 0.15% and Cu, wherein the rate of Ni and Si is more than 8: 1. The making method comprises the following steps: adding Ni, Zr, Co and Sn to exert alloy element action; heating; obtaining the copper alloy material without beryllium.

Description

technical field [0001] The invention relates to an alloy for thin strip continuous casting crystal rolls. Background technique [0002] Thin strip continuous casting is that molten steel passes through high-speed rotating crystallization rolls, and is solidified into a 1-5mm cast strip under the action of rolling force. The superheat and latent heat of crystallization of the molten steel will be taken away by the water-cooled crystallization roller, and then solidified on the crystallization roller, and the two solidified shells will merge at the "joint point" to form a casting belt. One side of the crystallization roll is in contact with the molten steel; the other side is water-cooled and subjected to the rent of rolling force at the same time. This requires the material of the crystal roller to have: 1) good thermal conductivity; 2) high strength and hardness; 3) resistance to rapid heat and rapid cooling; 4) fatigue resistance to alternating heat. [0003] For the cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C1/02C22F1/08
Inventor 于艳方园秦波崔健
Owner BAOSHAN IRON & STEEL CO LTD
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