CN109055803B - 一种高强抗磨铜基复合材料 - Google Patents
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000010949 copper Substances 0.000 title claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 238000005245 sintering Methods 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000011812 mixed powder Substances 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 3
- 230000000630 rising effect Effects 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 239000010963 304 stainless steel Substances 0.000 description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000002490 spark plasma sintering Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
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- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/058—Mixtures of metal powder with non-metallic powder by reaction sintering (i.e. gasless reaction starting from a mixture of solid metal compounds)
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- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0094—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with organic materials as the main non-metallic constituent, e.g. resin
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
- B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
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Abstract
本发明公开了一种高强抗磨铜基复合材料,该复合材料通过以下方法制备得到:按照质量百分比称取80~95wt%的铜粉和5~20wt%的塞隆粉末,将粉末置于球磨机中混合,随后将混合粉末装入石墨模具中,置于放电等离子烧结炉中烧结;烧结参数为:真空度为10‑2~10‑1Pa,升温速度为50~150ºC/min,烧结温度为850~1000ºC,压力为20~35MPa,保温时间5~10min;烧结结束后,随炉冷却至室温得到铜基复合材料。本发明所述铜基复合材料兼具优异的力学性能(高强度)和摩擦学性能(低磨损),特别适用于在服役工况下要求高强度同时保持低磨损的特殊工件。
Description
技术领域
本发明涉及一种高强抗磨铜基复合材料,该材料具有优异机械性能,断裂强度可达400Mpa左右,应变率在15%以上,同时兼具良好的抗磨损性能,其磨损率低至10-6mm3/Nm。
背景技术
结构材料的可靠性和稳定性对于高端装备机械系统的安全、稳定、高效运行起关键因素。铜及铜合金以其良好的导电导热性、优异的抗蚀性及优良的塑形和冷热加工性能,被广泛的应用于电子电力、石油化工、机械、航海造船和低温制冷等领域。但作为结构材料也有其缺点,突出的问题在于强度低,耐磨性能差。紫铜的屈服强度和抗拉强度低,屈服强度不超过70MPa,尽管通过冷加工可提高其强度,但是由于自然时效的作用,强度难以长久的保持。磨损率高、承载能力差是紫铜在摩擦学领域应用中存在的主要问题。因此,如何有效的提高紫铜的强度,改善其抗磨性能,使其获得更广泛的应用,已经成为当前材料科学和摩擦学领域的前沿课题之一。
从材料的强化机理和摩擦学的基本理论出发,通过添加第二相颗粒,来改善材料的强度和摩擦学性能。一方面,第二相的掺杂不仅可以细化晶粒,而且可使复合材料兼具第二相颗粒的高强度来改善机械性能。另一方面,第二相颗粒通过改善机械性能以及摩擦过程中的接触状态来改善材料的抗磨损性能。
发明内容
本发明的目的在于提供一种高强抗磨铜基复合材料,该材料具有优异机械性能同时兼具良好的抗磨性能。
本发明掺杂与基体结合良好且分布均匀的塞隆陶瓷粉末,利用了铜跟塞隆粉末在制备过程中可以发生反应,生成结合良好的过渡层,对改善材料强度及其抗磨损性能具有重要的意义。
一种高强抗磨铜基复合材料,其特征在于该复合材料通过以下方法制备得到:按照质量百分比称取80~95wt%的铜粉和5~20wt%的塞隆粉末,将粉末置于球磨机中混合,随后将混合粉末装入石墨模具中,置于放电等离子烧结炉中烧结;烧结参数为:真空度为10-2~10-1Pa,升温速度为50~150ºC/min,烧结温度为850~1000ºC,压力为20~35MPa,保温时间5~10min;烧结结束后,随炉冷却至室温得到铜基复合材料。
所述混合粉末的粒径为0.55~15μm。
所述塞隆的组成为Si4Al2O2N6。
采用DY35万能试验机测试合金的室温压缩强度。压缩试样尺寸为φ3mm×6mm,压头下移速度为0.1mm/min。摩擦磨损实验采用HT-1000高温摩擦磨损试验机进行评价,对偶球为304不锈钢球,载荷为5N,滑动线速度为0.10m/s,摩擦半径为4mm,行程为200m,测试温度为25ºC。压缩实验、摩擦系数和磨损率为3次试验平均值。
本发明所述高强抗磨铜基复合材料具有以下优点:
1、铜基复合材料由结合良好的铜、塞隆和两者反应的过渡层组成。这种材料的制备不仅是基于第二相颗粒可以细化晶粒来改善材料的强度,而且充分考虑到塞隆可与铜在高温烧结时发生反应,生成结合良好的铜-塞隆复合材料,进而赋予铜基复合材料优异的机械性能。该材料经压缩试验测试发现,在室温下具有优异的机械性能,其断裂强度可达400Mpa左右,应变率在15%以上。
2、通过掺杂塞隆,铜基复合材料在室温时具有优异的抗磨损性能,其磨损率低至10-6mm3/ Nm,实现了铜基复合材料的结构/抗磨功能一体化设计。
本发明所制备的铜基复合材料兼具优异的力学性能和摩擦学性能,特别适用于在服役工况下要求高强度同时保持低磨损的特殊工件。
附图说明
图1为本发明所述铜基复合材料CS1的压缩应力-应变曲线。
图2为本发明所述铜基复合材料CS3的压缩应力-应变曲线。
具体实施方式
实施例1:
按照质量百分比,分别称取95wt%的铜粉和5wt%的塞隆粉末,其中塞隆粉末的组成为Si4Al2O2N6;然后将粉末置于球磨机中混合,得到粒径为0.55~15μm的混合粉末。随后将混合粉末装入石墨模具中,置于等离子体烧结炉中烧结。烧结参数为:真空度低于5×10- 1Pa,升温速率100ºC/min,烧结温度950ºC,压力30MPa,保温时间7min。烧结结束后,随炉冷却至室温得到铜基复合材料CS1。然后采用DY35万能试验机测试合金的室温压缩强度。压缩试样尺寸为φ3mm×6mm,压头下移速度为0.1mm/min。其铜基复合材料压缩应力-应变曲线如图1所示。
实施例2:
按照质量百分比,分别称取90wt%的铜粉和10wt%的塞隆粉末,其中塞隆粉末的组成为Si4Al2O2N6;然后将粉末置于球磨机中混合,得到粒径为0.55~15μm的混合粉末。随后将混合粉末装入石墨模具中混合,置于放电等离子烧结炉中烧结。烧结参数为:真空度低于5×10-1Pa,升温速率100ºC/min,烧结温度950ºC,压力30 MPa,保温时间7 min。烧结结束后,随炉冷却至室温得到铜基复合材料。摩擦磨损实验采用HT-1000高温摩擦磨损试验机进行评价,对偶球为304不锈钢球,载荷为5N,滑动线速度为0.10m/s,摩擦半径为4mm,行程为200m,测试温度为25ºC。其磨损率见表1。
实施例3:
按照质量百分比,分别称取80wt%的铜粉和20wt%的塞隆粉末,其中塞隆粉末的组成为Si4Al2O2N6;然后将粉末置于球磨机中混合,得到粒径为0.55~15μm的混合粉末。随后将混合粉末装入石墨模具中,置于放电等离子烧结炉中烧结。烧结参数为:真空度低于5×10-1Pa,升温速率100ºC/min,烧结温度950ºC,压力30MPa,保温时间7min。烧结结束后,随炉冷却至室温得到铜基复合材料CS3。采用DY35万能试验机测试合金的室温压缩强度。压缩试样尺寸为φ3mm×6mm,压头下移速度为0.1mm/min。其铜基复合材料压缩应力-应变曲线如图2所示。摩擦磨损实验采用HT-1000高温摩擦磨损试验机进行评价,对偶球为304不锈钢球,载荷为5N,滑动线速度为0.10m/s,摩擦半径为4mm,行程为200m,测试温度为25ºC,其磨损率见表1。
表1:实施例2和实施例3的铜基复合材料与304不锈钢球配副的磨损率。
Claims (2)
1.一种高强抗磨铜基复合材料,其特征在于该复合材料通过以下方法制备得到:按照质量百分比称取80~95wt%的铜粉和5~20wt%的塞隆粉末,将粉末置于球磨机中混合,随后将混合粉末装入石墨模具中,置于放电等离子烧结炉中烧结;烧结参数为:真空度为10-2~10-1Pa,升温速度为50~150ºC/min,烧结温度为850~1000ºC,压力为20~35MPa,保温时间5~10min;烧结结束后,随炉冷却至室温得到铜基复合材料;所述混合粉末的粒径为0.55~15μm。
2.如权利要求1所述的复合材料,其特征在于所述塞隆的组成为Si4Al2O2N6。
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