Low-temperature superhigh-toughness wear-resistant copper alloy and preparing method thereof

A technology of wear-resistant copper and copper alloy, which is applied in the fields of wear-resistant copper alloy and its preparation, low-temperature ultra-high toughness wear-resistant copper alloy and its preparation, and can solve problems such as poor impact toughness, increased material brittleness, and reduced impact energy. Achieve stable wear resistance, improve wear resistance, and improve the effect of comprehensive mechanical properties

Active Publication Date: 2017-07-04
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, according to foreign data and our recent research, although some wear-resistant copper alloys have good toughness at room temperature, their impact toughness is poor at -196°C
For example, after the wear-resistant tin bronze is cold-worked, the room temperature impact energy A kv2 It can reach 100J, but the impact energy decreases to less than 45J at -196°C; the wear-resistant aluminum bronze alloy with high strength and high hardness has a good wear resistance at room temperature due to the brittle phase of the lamellar structure, but it increases when used at low temperature. The brittleness of the material is improved, and its impact energy is reduced to less than 30J at -196°C; the impact energy of wear-resistant complex brass at -196°C is A kv2 The value is also less than 35J
According to reports in foreign books and materials, the low-temperature impact energy A of copper-nickel alloys kv2 The value can reach up to 100J, but domestic reports on low-temperature impact toughness of copper-nickel alloys have not yet been published.

Method used

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preparation example Construction

[0020] The preparation method of the low-temperature ultra-high toughness wear-resistant copper alloy of the present invention, its specific process steps include:

[0021] (1) Billet melting and casting: use pure copper, pure nickel, pure manganese, pure zinc, pure titanium, pure iron, pure chromium and other metals with a purity greater than 99.9% as raw materials, and carry out smelting in an intermediate frequency induction melting furnace according to the alloy composition. After heat preservation, pour into a Φ200mm copper ingot at a temperature of 1180-1250°C;

[0022] (2) Hot extrusion process: after the copper ingot is peeled, it is hot-extruded at a temperature of 600-700°C, and extruded into a copper rod of Φ50mm;

[0023] (3) Hot forging process: the extruded copper alloy bar is forged and deformed at 500-700 ° C, first forged in one direction, and the pass reduction is 20-30%; then the billet is turned 90 ° , and then perform the same forging as before. Accordin...

Embodiment 1

[0025] Its production process is as follows: ingredients - casting - hot extrusion - hot forging - finished product

[0026] The specific process is as follows: smelting in an intermediate frequency induction melting furnace, the ingredients are distributed as shown in Table 1, and the smelting temperature is 1180°C. Before smelting, copper, nickel, manganese, zinc, titanium, iron and chromium are made into alloy materials. During smelting, the alloy material is added at one time, and cast into a Φ200mm ingot after standing still and removing slag. After the ingot is peeled, it is hot-extruded at a temperature of 600°C and extruded into a Φ50mm copper rod. Then, hot forging the copper alloy bar at 500°C for 4 times, turning the billet 90° after each forging, with a reduction of 20% per pass and a total reduction of 80%, and finally air-cooled to room temperature, Made into a finished product. The mechanical properties of the prepared finished product at a low temperature of...

Embodiment 2

[0028] Its production process is as follows: ingredients - casting - hot extrusion - hot forging - finished product

[0029] The specific process is as follows: smelting in an intermediate frequency induction melting furnace, the ingredients are distributed as shown in Table 1, and the smelting temperature is 1200°C. Before smelting, copper, nickel, manganese, zinc, titanium, iron and chromium are made into alloy materials. During smelting, the alloy material is added at one time, and cast into a Φ200mm ingot after standing still and removing slag. After the ingot is peeled, it is hot-extruded at a temperature of 700°C and extruded into a Φ50mm copper rod. Then, hot forging the copper alloy bar at 700°C for 3 times, turning the billet 90° after each forging, the pass reduction is 30%, the total reduction is 90%, and finally air-cooled to room temperature, Made into a finished product. The mechanical properties of the prepared finished product at a low temperature of -196°C ...

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Abstract

The invention relates to low-temperature superhigh-toughness wear-resistant copper alloy and a preparing method thereof and belongs to the technical fields of metal materials and preparation. The copper alloy consists of the following components in a percent by mass: 25.0-45.0% of nickel, 2-15% of manganese, 1-8% of zinc, 0.1-5.0% of titanium, 0.5-5% of iron, 0.1-3% of chromium and the balance of copper. The preparing method comprises the following preparing steps: preparing materials, carrying out casting, carrying out hot extrusion, carrying out hot forging and obtaining a finished product. The low-temperature comprehensive mechanical properties and the wear resistance of the alloy are improved by adding the elements, such as the manganese, the zinc, the titanium, the iron and the chromium, and at the same time, the alloy is ensured to have great processability. The impact energy of the prepared copper alloy material at the low temperature of -196 DEG C is larger than 170J and is 3-5 times of other common wear-resistant copper alloy materials. The copper alloy material is particularly suitable for manufacturing wear-resistant parts used in low-temperature environments in the fields of aviation, aerospace and the like.

Description

technical field [0001] The invention relates to a low-temperature ultra-high toughness wear-resistant copper alloy and a preparation method thereof, in particular to a wear-resistant copper alloy with ultra-high impact energy at a low temperature of -196°C and a preparation method thereof, belonging to metal materials and their preparation technology field. Background technique [0002] Wear-resistant copper alloy materials are used to make gears, bearing bushes, sealing rings, hydraulic pump friction pairs, etc., and are widely used in aerospace, military, petrochemical, transportation and other fields. There has been a long history of research on wear-resistant copper alloys used at room temperature at home and abroad, and a series of industrial products such as complex brass, tin bronze, and aluminum bronze have been formed. [0003] With the rapid development of modern aerospace and other fields, higher and higher requirements are put forward for the comprehensive mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22F1/08
CPCC22C9/06C22F1/08
Inventor 王强松刘冬梅解国良
Owner GRIMAT ENG INST CO LTD
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