CN100491558C - A high-performance yttrium-based heavy rare earth copper alloy mold material and its preparation method - Google Patents

A high-performance yttrium-based heavy rare earth copper alloy mold material and its preparation method Download PDF

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CN100491558C
CN100491558C CNB200710051881XA CN200710051881A CN100491558C CN 100491558 C CN100491558 C CN 100491558C CN B200710051881X A CNB200710051881X A CN B200710051881XA CN 200710051881 A CN200710051881 A CN 200710051881A CN 100491558 C CN100491558 C CN 100491558C
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alloy
yttrium
rare earth
copper
heavy rare
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CN101148717A (en
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陈乐平
周全
庄建平
张剑平
黄松
彭新元
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NANCHANG AVIATION INDUSTRY COLLEGE
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Abstract

The present invention relates to preparation process of high performance copper alloy mold material, and is especially preparation process of high performance yttrium-base heavy RE copper alloy mold material. The high performance yttrium-base heavy RE copper alloy mold material has small amount of yttrium-base heavy RE added into traditional NBC alloy, and is prepared through hot forging, solid solution treatment, cold forging, ageing treatment and other steps. It has balanced comprehensive performance, obviously raised conductivity and wear resistance compared with traditional NBC alloy. It may be applied widely in electronic sealing mold, pressure casting mold, injection molding mold, etc.

Description

一种高性能钇基重稀土铜合金模具材料及其制备方法 A high-performance yttrium-based heavy rare earth copper alloy mold material and its preparation method

所属技术领域Technical field

本发明涉及模具材料,尤其是一种高性能钇基重稀土铜合金及其制备方法。The invention relates to a mold material, in particular to a high-performance yttrium-based heavy rare earth copper alloy and a preparation method thereof.

背景技术 Background technique

目前,国内很多企业仍采用钨铜做封焊材料,而大部分外资和合资企业则依赖于从国外进口高性能铜合金用于封焊模具。另一方面,应用于压铸模头,目前国内压铸模头普遍采用铸铁,其压射寿命不超过3000次。而国外均采用含铍的高性能铜合金,其寿命超过15000次,大大提高了使用寿命,减少更换模头时造成压铸件报废,且因含铍模头表面形成一层致密的润滑层,避免了昂贵压射室的磨损,大大减少了其返修次数,其综合效益也非常显著。在国外,对于高性能铜合金应用于压铸模头有专门的研制、生产企业,如美国SEMCO公司。在国内,90年代才刚起步,其产品使用效果和国外差距还很大,处于低层次,低水平状态。第三方面,国外在精密注塑模中,将高性能铜合金应用于模具材料热节点,因其具有优良特性,增加了模具热节点处的散热速度,保证模具整体冷却均匀,提高了模具的使用效率和寿命,注塑速度提高了2倍,且注塑件表面质量也有所提高。虽然国内在这方面也有所研究和实践,但因材质选择余地少且材质性能上也有些问题,使用效果不太理想。目前国内主要是以一般铍青铜系列作为替代品,但国内铍青铜的品种只有2-3种,实际应用中寿命短,导致设备生产效率低,跟进口同类产品差距很大;国外达20余品种。国外主要生产厂家美国Brushwallman,南韩咏日,日本江户川特殊金属株式会社等,他们专业分工都很细。国内主要生产厂家为水口山矿物局第6冶炼厂,东方钽业有限公司,但他们生产的品种重复,且对那些专业性很强的品种难以组织生产。因此,开发高性能铜合金模具材料以适应市场的需要是有色金属行业发展的方向。At present, many domestic enterprises still use tungsten copper as sealing and welding materials, while most foreign capital and joint ventures rely on importing high-performance copper alloys from abroad for sealing and welding molds. On the other hand, for die-casting dies, cast iron is generally used in domestic die-casting dies at present, and its injection life does not exceed 3000 times. In foreign countries, high-performance copper alloys containing beryllium are used, and their service life exceeds 15,000 times, which greatly improves the service life and reduces the scrapping of die-casting parts when replacing the die head. It reduces the wear of expensive injection chambers, greatly reduces the number of repairs, and its comprehensive benefits are also very significant. In foreign countries, there are special development and production enterprises for high-performance copper alloys used in die-casting dies, such as the US SEMCO company. In China, it just started in the 1990s, and its product use effect is still far behind that of foreign countries, and it is in a low-level and low-level state. In the third aspect, in foreign countries, high-performance copper alloys are applied to hot nodes of mold materials in precision injection molds. Efficiency and life, the injection speed has been increased by 2 times, and the surface quality of injection molded parts has also been improved. Although there are researches and practices in this area in China, the effect of use is not ideal due to the limited choice of materials and some problems in material performance. At present, the domestic beryllium bronze series is mainly used as a substitute, but there are only 2-3 varieties of beryllium bronze in China, and the service life is short in practical applications, resulting in low production efficiency of equipment, which is far behind similar imported products; there are more than 20 varieties in foreign countries. . Major foreign manufacturers include Brushwallman in the United States, Yongil in South Korea, and Edogawa Special Metal Co., Ltd. in Japan. They have a very detailed division of labor. The main domestic manufacturers are the No. 6 smelter of Shuikoushan Mineral Bureau and Dongfang Tantalum Industry Co., Ltd., but the varieties they produce are repeated, and it is difficult to organize the production of those highly specialized varieties. Therefore, the development of high-performance copper alloy mold materials to meet the needs of the market is the development direction of the non-ferrous metal industry.

目前高性能铜合金模具材料的制备方法主要有合金化法、复合材料法和快速凝固法。人工复合材料法制备的高性能铜合金,可以使铜的强度获得大大的提高,但是往往由于材料内部缺陷严重,导致导电性能恶化,再加上制备工艺限制,该方法只适用于高强高导铜小型件的制造。内部自生法虽然较好地解决了增强相与基体不润湿的问题,但需要解决增强相的均匀化和粗化问题。快速凝固法工艺复杂,生产成本高。常规合金化法生产的高性能铜合金模具材料,能够直接与常规铸造特别是连续铸造技术相结合,可大幅度地降低铜合金的生产成本,适合规模化生产,其产品不但可以作为功能材料,而且可以作为结构材料,从而仍显示出强大的生命力。目前开发的大多数铜合金模具材料,如强度高则导电导热性欠佳,如导电导热性好则强度不够理想,这是因为材料的强度和导电性是一对矛盾,这就使得制备高强高导性材料的技术难度很大。在冶金工业中,稀土常被称作是金属材料的“维生素”。稀土在铜合金中的作用主要有:脱氧、脱硫、脱氢及脱除铅等有害元素,净化铜合金的成分;消除枝状晶,细化晶粒,提高塑性和强度,减少表面裂纹和缺陷;改善和提高铜及其合金的热加工性能;提高铜及其合金的导电性、热强性、抗氧化性和焊接性能。稀土对铜合金性能的改善已被大量实验所证实,如:在普通电解铜中加入一定量的稀土可生产出高导电率的铜排,其导电率、抗拉强度、延伸率、高温软化温度等指标均优于普通的紫铜排;在铜合金中加入一定量的铈,可明显提高合金的耐腐性和抗局部腐蚀能力;在Cu-Cr合金中加入不超过0.5%的铱、镧等稀土元素可使合金抗拉强度达570Mpa,电导率达90%IACS;在纯铜中加入0.05%左右的稀土可使其导电率达到1031ACS。At present, the preparation methods of high-performance copper alloy mold materials mainly include alloying method, composite material method and rapid solidification method. The high-performance copper alloy prepared by the artificial composite material method can greatly improve the strength of copper, but often due to the serious internal defects of the material, the electrical conductivity deteriorates, and coupled with the limitation of the preparation process, this method is only suitable for high-strength and high-conductivity copper. Manufacture of small parts. Although the internal self-generation method can better solve the problem of non-wetting between the reinforcement phase and the matrix, it needs to solve the problem of homogenization and coarsening of the reinforcement phase. The rapid solidification process is complicated and the production cost is high. The high-performance copper alloy mold material produced by conventional alloying method can be directly combined with conventional casting, especially continuous casting technology, which can greatly reduce the production cost of copper alloy and is suitable for large-scale production. Its products can not only be used as functional materials, And it can be used as a structural material, so it still shows strong vitality. Most of the copper alloy mold materials currently developed, if the strength is high, the electrical and thermal conductivity is not good, and if the electrical and thermal conductivity is good, the strength is not ideal. This is because the strength and electrical conductivity of the material are a pair of contradictions, which makes the preparation of high strength and high Conductive materials are technically difficult. In the metallurgical industry, rare earths are often referred to as the "vitamins" of metal materials. The main functions of rare earths in copper alloys are: deoxidation, desulfurization, dehydrogenation and removal of harmful elements such as lead, purifying the composition of copper alloys; eliminating dendrites, refining grains, improving plasticity and strength, and reducing surface cracks and defects ; Improve and enhance the hot workability of copper and its alloys; improve the electrical conductivity, thermal strength, oxidation resistance and welding performance of copper and its alloys. The improvement of rare earth on the performance of copper alloy has been confirmed by a large number of experiments. For example, adding a certain amount of rare earth to ordinary electrolytic copper can produce a copper bar with high conductivity. Its conductivity, tensile strength, elongation, high temperature softening temperature and other indicators are better than ordinary copper bars; adding a certain amount of cerium to the copper alloy can significantly improve the corrosion resistance and local corrosion resistance of the alloy; adding no more than 0.5% iridium, lanthanum, etc. to the Cu-Cr alloy Rare earth elements can make the tensile strength of the alloy reach 570Mpa, and the electrical conductivity can reach 90% IACS; adding about 0.05% rare earth elements to pure copper can make the electrical conductivity reach 1031ACS.

ZL02148648.4公布了一种用于引线框架、电极合金及微电子封装材料等高强度高导电用铜合金及其制造技术。该项发明是在传统的CuCrZr合金的基础上添加微量合金元素La、Zn以及Fe(或Co)和Ti。ZL200510096378.7公开了一种铜基高强高导性材料及其制备工艺,它是以铜为基体,添加铁、磷、硼元素和稀土或稀土混合物,从而制得铜基高强高导性材料。ZL96120446.X公开了一种铜基合金,其化学成中含有RE(La+Ce)0.05-0.25%。虽然有关稀土在铜合金中的应用国内外均有报道,但是关于稀土在高性能铜合金模具材料中的应用,特别是钇基重稀土在高性能铜合金模具材料的应用却未见文献和专利报道。ZL02148648.4 discloses a high-strength and high-conductivity copper alloy used for lead frames, electrode alloys and microelectronic packaging materials and its manufacturing technology. The invention adds trace alloy elements La, Zn, Fe (or Co) and Ti on the basis of traditional CuCrZr alloy. ZL200510096378.7 discloses a copper-based high-strength and high-conductivity material and its preparation process. It uses copper as a matrix and adds iron, phosphorus, boron elements and rare earths or rare earth mixtures to prepare copper-based high-strength and high-conductivity materials. ZL96120446.X discloses a copper-based alloy whose chemical composition contains 0.05-0.25% of RE(La+Ce). Although there are reports on the application of rare earths in copper alloys at home and abroad, there are no literature and patents on the application of rare earths in high-performance copper alloy mold materials, especially the application of yttrium-based heavy rare earths in high-performance copper alloy mold materials. reports.

发明内容 Contents of the invention

本发明的目的是提出一种具有高性能铜合金模具材料及其制备方法,在传统的NBC(含镍、铍和钴的铍青铜)合金的基础上添加微量钇基重稀土,并通过热锻、固溶处理、冷锻、时效等工艺,使其合金的综合性能达到平衡,其电导率和耐磨性与传统的NBC合金相比,有明显提高。其制备方法简单,原料成本低,使用寿命高,从而实现其在电子封焊模具、压铸模头、注塑模具热节点等领域的广泛应用。The purpose of this invention is to propose a kind of high-performance copper alloy mold material and its preparation method, on the basis of traditional NBC (containing nickel, beryllium and cobalt beryllium bronze) alloy, add trace yttrium-based heavy rare earth, and through hot forging , solid solution treatment, cold forging, aging and other processes, the comprehensive properties of the alloy are balanced, and its electrical conductivity and wear resistance are significantly improved compared with traditional NBC alloys. The preparation method is simple, the cost of raw materials is low, and the service life is long, so that it can be widely used in the fields of electronic sealing and welding molds, die-casting dies, hot nodes of injection molds, and the like.

本发明提出的高性能铜合金模具材料是在NBC合金的基础上添加0.01~3%重量比的钇基重稀土,钇基重稀土以铜-钇中间合金的形式加入,传统的NBC含镍、铍和钴的铍青铜的具体成份为:1.8%-2.0%Ni,0.9%-1.0%Co,0.45%-0.5%Be,其余为Cu。中间合金的成分的重量比为:ReO1-11%,Cu15-30%,Si30-35%,Fe20-25%,Mg0-5%,B0-5%。The high-performance copper alloy mold material proposed by the present invention is to add 0.01 to 3% by weight of yttrium-based heavy rare earth on the basis of NBC alloy, and the yttrium-based heavy rare earth is added in the form of copper-yttrium intermediate alloy. Traditional NBC contains nickel, The specific composition of beryllium and cobalt beryllium bronze is: 1.8%-2.0% Ni, 0.9%-1.0% Co, 0.45%-0.5% Be, and the rest is Cu. The weight ratio of the composition of the master alloy is: ReO1-11%, Cu15-30%, Si30-35%, Fe20-25%, Mg0-5%, B0-5%.

本发明提出的高性能铜合金模具材料的制备方法是在NBC合金的基础上添加0.01~3%的钇基重稀土,包括如下步骤:The preparation method of the high-performance copper alloy mold material proposed by the present invention is to add 0.01 to 3% yttrium-based heavy rare earth on the basis of NBC alloy, including the following steps:

(1)熔炼:采用传统的铜合金熔炼工艺。NBC合金熔炼完毕,添加0.01~3%重量比的钇基重稀土,钇基重稀土以铜-钇中间合金的形式加入,中间合金的成分的重量比为:ReO1-11%,Cu15-30%,Si30-35%,Fe20-25%,Mg0-5%,B0-5%。熔炼1~4分钟后进行浇注。(1) Smelting: The traditional copper alloy smelting process is adopted. After the NBC alloy is smelted, 0.01-3% by weight of yttrium-based heavy rare earth is added, and the yttrium-based heavy rare earth is added in the form of copper-yttrium master alloy. The weight ratio of the master alloy is: ReO1-11%, Cu15-30% , Si30-35%, Fe20-25%, Mg0-5%, B0-5%. Cast after melting for 1 to 4 minutes.

(2)热锻:将上述浇注的合金锭在850~950℃保温0.5~4小时,然后在热锻机上进行40~80%变形锻造。(2) Hot forging: heat the cast alloy ingot at 850-950° C. for 0.5-4 hours, and then carry out 40-80% deformation forging on a hot forging machine.

(3)固溶处理:将热锻后的板材装入热处理炉中,在950~1050℃下保温2~5小时,使其合金元素充分溶入铜基体中,然后进行淬火处理。(3) Solution treatment: put the hot-forged plate into a heat treatment furnace, and keep it warm at 950-1050°C for 2-5 hours to fully dissolve the alloy elements into the copper matrix, and then perform quenching treatment.

(4)冷锻:将淬火后的合金进行40~90%的冷变形处理。(4) Cold forging: subject the quenched alloy to 40-90% cold deformation treatment.

(5)时效处理:将合金在450~480℃保温0.5~3小时或采用分级时效工艺。(5) Aging treatment: heat the alloy at 450-480°C for 0.5-3 hours or adopt a graded aging process.

本发明的高性能铜合金模具材料及其制备方法具有下列优点:1)采用稀土微合金化法生产的高性能铜合金模具材料,能够直接与常规铸造特别是连续铸造技术相结合,可大幅度地降低铜合金模具材料的生产成本,适合规模化生产,其产品不但可以作为功能材料,而且可以作为结构材料。2)铜合金模具材料的综合性能好。铜合金模具材料都存在增加合金元素加入量,能大幅度提高合金的综合性能,但都会大大降低导电性能;而减少合金元素加入量,导电性能则可变好,但其综合性能就差的问题。钇基重稀土能够同时提高铜合金模具材料的力学性能、导电性能和使用寿命。3)采用铜-钇中间合金的方式加入钇基重稀土,可以防止稀土的偏析和烧损严重。The high-performance copper alloy mold material of the present invention and its preparation method have the following advantages: 1) the high-performance copper alloy mold material produced by the rare earth microalloying method can be directly combined with conventional casting, especially continuous casting technology, and can be greatly improved. It can greatly reduce the production cost of copper alloy mold materials, and is suitable for large-scale production. Its products can be used not only as functional materials, but also as structural materials. 2) The overall performance of the copper alloy mold material is good. Copper alloy mold materials have the problem that increasing the amount of alloying elements can greatly improve the overall performance of the alloy, but will greatly reduce the electrical conductivity; while reducing the amount of alloying elements, the electrical conductivity can be improved, but its overall performance is poor. . Yttrium-based heavy rare earth can simultaneously improve the mechanical properties, electrical conductivity and service life of copper alloy mold materials. 3) Adding yttrium-based heavy rare earths in the form of a copper-yttrium master alloy can prevent serious segregation and burning loss of rare earths.

具体实施方式 Detailed ways

下面结合具体的实施例对本发明的实施方式做进一步说明:Below in conjunction with specific embodiment the embodiment of the present invention will be further described:

实施例1:Example 1:

高性能铜合金模具材料是在NBC合金的基础上添加2%重量比的钇基重稀土,NBC含镍、铍和钴的铍青铜的具体成分的重量比为:1.8%的Ni,0.9%的Co,0.45%的Be,其余为Cu。钇基重稀土以铜-钇中间合金的形式加入,中间合金的成分的重量比为:ReO10%,Cu30%,Si35%,Fe25%。The high-performance copper alloy mold material is based on NBC alloy with 2% yttrium-based heavy rare earth added by weight. The specific composition of NBC beryllium bronze containing nickel, beryllium and cobalt is: 1.8% Ni, 0.9% Co, 0.45% Be, the balance Cu. The yttrium-based heavy rare earth is added in the form of copper-yttrium master alloy, and the weight ratio of the master alloy is: ReO10%, Cu30%, Si35%, Fe25%.

实施例1高性能铜合金模具材料的制备方法是如下The preparation method of embodiment 1 high-performance copper alloy mold material is as follows

1)熔炼:采用传统的铜合金熔炼工艺将NBC合金熔炼完毕,加入铜-钇中间合金2%,熔炼2分钟后进行浇注。1) Smelting: The NBC alloy is smelted using a traditional copper alloy smelting process, and 2% of the copper-yttrium master alloy is added, and poured after 2 minutes of smelting.

2)热锻:将上述浇注的合金锭在850℃保温2小时,然后在热锻机上进行40%变形锻造。2) Hot forging: heat the cast alloy ingot at 850° C. for 2 hours, and then perform 40% deformation forging on a hot forging machine.

3)固溶处理:将合金锭装入热处理炉中,在980℃下保温3小时,然后进行淬火处理。3) Solution treatment: the alloy ingot is put into a heat treatment furnace, kept at 980° C. for 3 hours, and then quenched.

4)冷锻:将淬火后的合金进行40%的冷变形处理。4) Cold forging: subject the quenched alloy to 40% cold deformation treatment.

5)时效处理:将合金在480℃保温3小时。5) Aging treatment: heat the alloy at 480° C. for 3 hours.

稀土铜合金与普通NBC合金相比,性能提高如下:材料的导电率提高了19.4%,电子封焊模具的使用寿命提高了21%,材料的封焊合格率提高了0.3%。Compared with common NBC alloy, rare earth copper alloy has the following performance improvements: the electrical conductivity of the material is increased by 19.4%, the service life of the electronic sealing and welding mold is increased by 21%, and the qualified rate of sealing and welding of the material is increased by 0.3%.

实施例2:Example 2:

高性能铜合金模具材料是在NBC合金的基础上添加1%重量比的钇基重稀土,NBC含镍、铍和钴的铍青铜的具体成分的重量比为:1.9%的Ni,0.9%的Co,0.5%的Be,其余为Cu。钇基重稀土以铜-钇中间合金的形式加入,中间合金的成分的重量比为:ReO11%,Cu30%,Si35%,Fe24%。The high-performance copper alloy mold material is based on NBC alloy with 1% yttrium-based heavy rare earth added by weight. The specific composition of NBC beryllium bronze containing nickel, beryllium and cobalt is: 1.9% Ni, 0.9% Co, 0.5% Be, the balance Cu. The yttrium-based heavy rare earth is added in the form of copper-yttrium master alloy, and the weight ratio of the master alloy is: ReO11%, Cu30%, Si35%, Fe24%.

实施例2高性能铜合金模具材料的制备方法是如下:The preparation method of embodiment 2 high-performance copper alloy mold material is as follows:

1)熔炼:采用传统的铜合金熔炼工艺将NBC合金熔炼完毕,加入铜-钇中间合金1%,熔炼1分钟后进行浇注。1) Smelting: After the NBC alloy is smelted using a traditional copper alloy smelting process, 1% of the copper-yttrium master alloy is added and poured after smelting for 1 minute.

2)热锻:将上述浇注的合金锭在900℃保温2小时,然后在热锻机上进行60%变形锻造。2) Hot forging: heat the cast alloy ingot at 900° C. for 2 hours, and then perform 60% deformation forging on a hot forging machine.

3)固溶处理:将合金锭装入热处理炉中,在980℃下保温3小时,然后进行淬火处理。3) Solution treatment: the alloy ingot is put into a heat treatment furnace, kept at 980° C. for 3 hours, and then quenched.

4)冷锻:将淬火后的合金进行50%的冷变形处理。4) Cold forging: subject the quenched alloy to 50% cold deformation treatment.

5)时效处理:将合金在480℃保温3小时。5) Aging treatment: heat the alloy at 480° C. for 3 hours.

稀土铜合金与普通NBC合金相比,性能提高如下:导电率提高了14.6%,电子封焊模具的使用寿命提高了19%,材料的封焊合格率提高了0.25%。Compared with common NBC alloys, rare earth copper alloys have improved properties as follows: electrical conductivity increased by 14.6%, service life of electronic sealing and welding molds increased by 19%, and sealing and welding pass rate of materials increased by 0.25%.

实施例3:Example 3:

高性能铜合金模具材料是在NBC合金的基础上添加0.5%重量比的钇基重稀土,NBC含镍、铍和钴的铍青铜的具体成分的重量比为:2%的Ni,01%的Co,0.45%的Be,其余为Cu。钇基重稀土以铜-钇中间合金的形式加入,中间合金的成分的重量比为:ReO5%,Cu30%,Si35%,Fe25%,Mg2%,B3%。The high-performance copper alloy mold material is based on NBC alloy with 0.5% yttrium-based heavy rare earth added by weight. The specific composition of NBC beryllium bronze containing nickel, beryllium and cobalt is: 2% Ni, 01% Co, 0.45% Be, the balance Cu. The yttrium-based heavy rare earth is added in the form of copper-yttrium master alloy, and the weight ratio of the master alloy is: ReO5%, Cu30%, Si35%, Fe25%, Mg2%, B3%.

实施例3高性能铜合金模具材料的制备方法是如下The preparation method of embodiment 3 high-performance copper alloy mold material is as follows

1)熔炼:采用传统的铜合金熔炼工艺将NBC合金熔炼完毕,加入铜-钇中间合金0.5%,熔炼2分钟后进行浇注。1) Smelting: After the NBC alloy is smelted using the traditional copper alloy smelting process, 0.5% copper-yttrium master alloy is added, and poured after 2 minutes of smelting.

2)热锻:将上述浇注的合金锭在950℃保温3小时,然后在热锻机上进行80%变形锻造。2) Hot forging: heat the cast alloy ingot at 950° C. for 3 hours, and then perform 80% deformation forging on a hot forging machine.

3)固溶处理:将合金锭装入热处理炉中,在980℃下保温3小时,然后进行淬火处理。3) Solution treatment: the alloy ingot is put into a heat treatment furnace, kept at 980° C. for 3 hours, and then quenched.

4)冷锻:将淬火后的合金进行80%的冷变形处理。4) Cold forging: 80% cold deformation treatment is performed on the quenched alloy.

5)时效处理:440℃时效处理1h30min+480℃时效处理1h30min稀土铜合金与普通NBC合金相比,性能提高如下:硬度提高了11.93%,耐磨性能提高了15倍,耐腐蚀性能提高了29.6%,导电率提高了11.55%。5) Aging treatment: 440°C aging treatment for 1h30min+480°C aging treatment for 1h30min Compared with ordinary NBC alloy, the performance of rare earth copper alloy is improved as follows: the hardness is increased by 11.93%, the wear resistance is increased by 15 times, and the corrosion resistance is increased by 29.6% %, the conductivity increased by 11.55%.

Claims (2)

1. high-performance yttrium-base heavy rare earth copper alloy is characterized in that: include the yttrium-base heavy rare earth of 0.01~3% weight ratio in the beraloy of nickeliferous, beryllium and cobalt, the weight ratio of the concrete composition of the berylliumbronze of nickeliferous, beryllium and cobalt is:
1.8%-2.0%Ni, 0.9%-1.0%Co, 0.45%-0.5%Be, all the other are Cu; Yttrium-base heavy rare earth adds with the form of copper-yttrium master alloy, and the composition of master alloy is: ReO1-11%, Cu15-30%, Si30-35%, Fe20-25%, Mg0-5%, B0-5%.
2, a kind of preparation method of high-performance yttrium-base heavy rare earth copper alloy is to prepare as follows:
(1) melting: adopt traditional smelting copper alloy technology; The beraloy melting of nickeliferous, beryllium and cobalt finishes, add the yttrium-base heavy rare earth of 0.01~3% weight ratio, yttrium-base heavy rare earth adds with the form of copper-yttrium master alloy, the weight ratio of the composition of master alloy is: ReO1-11%, Cu15-30%, Si30-35%, Fe20-25%, Mg0-5%, B0-5%, melting was poured into a mould after 1~4 minute;
(2) forge hot: the alloy pig of above-mentioned cast is incubated 0.5~4 hour at 850~950 ℃, on warm forming machine, carries out 40~80% distortion then and forge;
(3) solution treatment: the sheet material after the forge hot is packed in the heat treatment furnace,, its alloying element is fully dissolved in the copper matrix, carry out quench treatment then 950~1050 ℃ of insulations 2~5 hours down;
(4) cold forging: the alloy after will quenching carries out 40~90% cold deformation processing;
(5) ageing treatment: alloy is incubated 0.5~3 hour or adopts interrupted aging technology at 450~480 ℃.
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CN101333609B (en) * 2007-06-28 2011-03-16 周水军 Low copper beryllium mold material for gravitation and low-pressure casting and production process thereof
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