CN102747262A - Preparation method of Al-Cr intermetallic compound/Al in-situ composite material - Google Patents
Preparation method of Al-Cr intermetallic compound/Al in-situ composite material Download PDFInfo
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- CN102747262A CN102747262A CN201210263565XA CN201210263565A CN102747262A CN 102747262 A CN102747262 A CN 102747262A CN 201210263565X A CN201210263565X A CN 201210263565XA CN 201210263565 A CN201210263565 A CN 201210263565A CN 102747262 A CN102747262 A CN 102747262A
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Abstract
The invention discloses a preparation method of an Al-Cr intermetallic compound/Al in-situ composite material. The preparation method comprises the following steps: heating a resistance furnace to 720 DEG C, placing industrial pure aluminum into a crucible, overheating aluminum liquid to 800-950 DEG C, adding metal chromium powder with grain size of 20-250 microns pre-treated at 250 DEG C for 2 hours, wherein the mass of the metal chromium powder is 1-2% of total mass; adopting ultrasonic vibrating stirring at the frequency of 20 KHZ and power of 1KW for 5-30 minutes, casting and forming to obtain the Al-Cr intermetallic compound/Al in-situ composite material. The composite material prepared by the invention has the advantages of high hardness, low wear rate, high compression strength, good corrosion resistance, good damping performance, good application prospect and economic significance.
Description
Technical field
The present invention relates to a kind of Al-Cr intermetallic compound/Al in-situ composite preparation method.
Background technology
Matrix material is by two or more materials with different properties, through the method for physics or chemistry, on macroscopic view, forms the material with new capability.Various materials make up for each other's deficiencies and learn from each other on performance, produce synergistic effect, make the over-all properties of matrix material be superior to former composition material and satisfy various requirement.Because characteristics such as that matrix material has is in light weight, intensity is high, machine-shaping is convenient, excellent spring, resistance to chemical attack and good weatherability; Progressively replace timber and metal alloy; Be widely used in fields such as aerospace, automobile, electric, building, body-building apparatus, obtained develop rapidly in recent years especially; Reaction in, wild phase are not outer to be added, but is reacted by the respective element of matrix alloy and adding, generates the wild phase of one or more disperses, forms the in-situ authigenic matrix material.Adopting this method great advantage is that wild phase forms in matrix, has avoided the pollution of wild phase, is beneficial to form the good interface combination; The ultrasonic vibration stirring casting method prepares matrix material; The acoustic cavitation and the acoustic streaming grade level effect that produce when utilizing high-energy ultrasonic in liquid, to propagate; Change body material and the surface energy that strengthens body, it is wetting that both realizations are forced, and combines good matrix material thereby prepare the interface.In recent years; Chinese scholars proposes high-energy ultrasonic composite algorithm and in-situ compositing are combined the preparation metal-base composites; The generation that purpose is to utilize TRANSIENT HIGH TEMPERATURE that the high-energy ultrasonic cavitation causes and high pressure can promote reaction in, and, do not have the interface reaction with matrix because the enhancing body that this method generated is a growth in situ; In conjunction with firmly, favourable to the performance of mentioning material.
Summary of the invention
The object of the present invention is to provide the preparation method of a kind of Al-Cr intermetallic compound/Al in-situ composite, its prepared material has the hardness height, and wear rate is low, and ultimate compression strength is high, and good corrosion resistance, damping and amortization wait excellent properties well.
The present invention realizes like this; The preparation method of a kind of Al-Cr intermetallic compound/Al in-situ composite; It is characterized in that said preparation method may further comprise the steps: earlier resistance furnace is warmed up to 720 ℃, puts into crucible to commercial-purity aluminium, when aluminium liquid is superheated to 800 ℃～950 ℃; Adding particle diameter is the hafnium metal powfers of 20～250 μ m through 250 ℃ of pre-treatment 2h, and wherein the quality of hafnium metal powfer accounts for 1%～20% of total mass; Adopt ultrasonic vibration to stir then, the frequency of ultrasonic vibration is 20KHZ, and power is 1KW, and the ultrasonic vibration time is 5min～30min, and last cast molding obtains Al-Cr intermetallic compound/Al in-situ composite.
Technique effect of the present invention is: (1) this matrix material is to be prepared from through reaction in, and wild phase is uniform distribution in matrix, and good with matrix bond, the interface is clean; (2) preparation technology is simple, easy handling, and good economy performance is beneficial to the realization industrial production automation; (3) performance of composites is excellent, and its Vickers' hardness can arrive 88.3HV, compares fine aluminium and has improved 2.4 times; Wear rate is 0.294%, compares the fine aluminium wear resistance and has improved 64.1 times; At 1mol/L NaHSO
3Behind the corrosion 192h, corrosion weight loss rate is 0.296g/m in the+1mol/L NaCl solution
2, compare fine aluminium and improved 2.21 times; Ultimate compression strength δ
BcCan reach 238MPa; The in-fighting value can reach 0.051084, compares fine aluminium and has improved 25.7 times.The hardness of this matrix material is high, and wear rate is low, and ultimate compression strength is high, good corrosion resistance, and damping and amortization is good etc., has a good application prospect and economic implications.
Description of drawings
Fig. 1 implements the matrix material micro-structure diagram of 1 preparation for the present invention.
Fig. 2 is the XRD analysis collection of illustrative plates of the matrix material material phase analysis of instance 1 preparation of the present invention.
Fig. 3 is the stress-strain diagram of the matrix material compression experiment of instance 2 preparations of the present invention.
Fig. 4 is the matrix material damping property testing result of instance 3 preparations of the present invention.
Embodiment
Earlier the hafnium metal powfer of 38 μ m is put into SX-6-13 molding box formula experimental furnace, under 250 ℃, carry out the 2h pre-treatment, be used for improving the activity of hafnium metal powfer; Again with SQ
2-4-13 type well formula resistance furnace is warmed up to 720 ℃, puts into crucible to the technical pure aluminium block; Aluminium liquid is superheated to 915 ℃, adds through pretreated hafnium metal powfer, mass content is 5% of a matrix material; The probe of KJ-1000 type supersound process appearance is put in about 5mm under the liquid aluminum, and logical water coolant is opened the supersound process appearance, and the power of ultrasonic vibration is 1KW, and frequency is 20KHZ, lets Al and Cr fully react; Ultrasonic vibration 20min, after the completion, casting.
Embodiment 2
Earlier the hafnium metal powfer of 75 μ m is put into SX-6-13 molding box formula experimental furnace, under 250 ℃, carry out the 2h pre-treatment, be used for improving the activity of hafnium metal powfer; Again with SQ
2-4-13 type well formula resistance furnace is warmed up to 720 ℃, puts into crucible to the technical pure aluminium block; Aluminium liquid is superheated to 885 ℃, adds through pretreated hafnium metal powfer, content is 8% of matrix material; The probe of KJ-1000 type supersound process appearance is put in about 5mm under the liquid aluminum, and logical water coolant is opened the supersound process appearance, and the power of ultrasonic vibration is 1KW, and frequency is 20KHZ, lets Al and Cr fully react; Ultrasonic vibration 20min, after the completion, casting.
Embodiment 3
Earlier the hafnium metal powfer of 75 μ m is put into SX-6-13 molding box formula experimental furnace, under 250 ℃, carry out the 2h pre-treatment, be used for improving the activity of hafnium metal powfer; Again with SQ
2-4-13 type well formula resistance furnace is warmed up to 720 ℃, puts into crucible to the technical pure aluminium block; Aluminium liquid is superheated to 915 ℃, adds through pretreated hafnium metal powfer, content is 10% of matrix material; The probe of KJ-1000 type supersound process appearance is put in about 5mm under the liquid aluminum, and logical water coolant is opened the supersound process appearance, and the power of ultrasonic vibration is 1KW, and frequency is 20KHZ, lets Al and Cr fully react; Ultrasonic vibration 10min, after the completion, casting.
The microtexture of the in-situ composite that Fig. 1 prepares for instance 1, the as can be seen from the figure even uniform distribution in matrix of intermetallic compound, good with matrix bond, the interface is clean.
Fig. 2 is the XRD variation diagram of the in-situ composite of instance 1 preparation, and as can be seen from the figure, in-situ composite is mainly by Al
0.983Cr
0.017, AlCr
2Form Deng intermetallic compound wild phase and aluminum substrate.
The stress-strain diagram of the compression experiment of the in-situ composite that Fig. 3 prepares for instance 2, δ
BcCan reach 238MPa.
The damping and amortization test result of the in-situ composite that Fig. 4 prepares for instance 3, in-fighting value are 0.051084.
In a word, by the Al-Cr intermetallic compound/Al base in-situ composite of the inventive method preparation, intermetallic compound wild phase original position generates, and with the basal body interface cleaning, consistency is good; Its hardness is high, and wear rate is low, and ultimate compression strength is high, good corrosion resistance, and damping and amortization is good; Preparation technology is simple, cost is low, is beneficial to the realization industrial production automation.
Claims (1)
1. the preparation method of Al-Cr intermetallic compound/Al in-situ composite; It is characterized in that said preparation method may further comprise the steps: earlier resistance furnace is warmed up to 720 ℃; Put into crucible to commercial-purity aluminium; When aluminium liquid was superheated to 800 ℃～950 ℃, adding particle diameter was the hafnium metal powfers of 20～250 μ m through 250 ℃ of pre-treatment 2h, and wherein the quality of hafnium metal powfer accounts for 1%～20% of total mass; Adopt ultrasonic vibration to stir then, the frequency of ultrasonic vibration is 20KHZ, and power is 1KW, and the ultrasonic vibration time is 5min～30min, and last cast molding obtains Al-Cr intermetallic compound/Al in-situ composite.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210263565.XA CN102747262B (en) | 2012-07-28 | 2012-07-28 | A kind of preparation method of Al-Cr intermetallic/Al in-situ composite |
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| CN201210263565.XA CN102747262B (en) | 2012-07-28 | 2012-07-28 | A kind of preparation method of Al-Cr intermetallic/Al in-situ composite |
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| CN102747262A true CN102747262A (en) | 2012-10-24 |
| CN102747262B CN102747262B (en) | 2016-08-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2620405C1 (en) * | 2016-03-24 | 2017-05-25 | Открытое акционерное общество "Композит" | Chromating alloy and method of alloy melting |
| CN110964951A (en) * | 2019-12-27 | 2020-04-07 | 成都航空职业技术学院 | Fe-C-Ti/ZL108 composite material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60106931A (en) * | 1983-11-15 | 1985-06-12 | Showa Alum Corp | Production of fiber reinforced metallic material |
| US5228494A (en) * | 1992-05-01 | 1993-07-20 | Rohatgi Pradeep K | Synthesis of metal matrix composites containing flyash, graphite, glass, ceramics or other metals |
-
2012
- 2012-07-28 CN CN201210263565.XA patent/CN102747262B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60106931A (en) * | 1983-11-15 | 1985-06-12 | Showa Alum Corp | Production of fiber reinforced metallic material |
| US5228494A (en) * | 1992-05-01 | 1993-07-20 | Rohatgi Pradeep K | Synthesis of metal matrix composites containing flyash, graphite, glass, ceramics or other metals |
Non-Patent Citations (6)
| Title |
|---|
| 刘劲松等: "固液均和铸造Al-Cr合金的耐蚀性能研究", 《化学工业与工程技术》 * |
| 林冲等: "超声振动对Al-17Si-xFe合金富铁相形貌的影响", 《特色铸造及有色合金》 * |
| 程兆虎等: "高能超声细化对Al/Si复合材料组织的影响", 《中国铸造装备与技术》 * |
| 郑梦等: "超声化学原位合成纳米Al2O3颗粒增强铝基复合材料的微观组织与力学行为", 《热加工工艺》 * |
| 陈小会: "原位合成Al-Ti金属间化合物增强铝基复合材料制备研究", 《南昌大学2011年硕士学位论文》 * |
| 陈振华等: "Al-10%Cr，Al-20%Mn合金的固液混合铸造", 《湖南大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2620405C1 (en) * | 2016-03-24 | 2017-05-25 | Открытое акционерное общество "Композит" | Chromating alloy and method of alloy melting |
| CN110964951A (en) * | 2019-12-27 | 2020-04-07 | 成都航空职业技术学院 | Fe-C-Ti/ZL108 composite material and preparation method thereof |
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| CN102747262B (en) | 2016-08-31 |
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