CN100398682C - Method for preparing micro-grain manganese bronze alloy - Google Patents
Method for preparing micro-grain manganese bronze alloy Download PDFInfo
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- CN100398682C CN100398682C CNB2005101118105A CN200510111810A CN100398682C CN 100398682 C CN100398682 C CN 100398682C CN B2005101118105 A CNB2005101118105 A CN B2005101118105A CN 200510111810 A CN200510111810 A CN 200510111810A CN 100398682 C CN100398682 C CN 100398682C
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Abstract
The present invention relates to a method for preparing micro grain manganese bronze alloy. Raw materials are mixed according to the following mass percentages: 94.5 to 98.8% of copper and 1.2 to 5.5% of manganese. The raw materials are smelted under the vacuum condition and made into a manganese bronze alloy cast blank. After ground, the manganese bronze alloy cast blank is heated to the temperature of 500 to 650 DEG C and rolled in a hot state. The manganese bronze alloy cast blank is made into a rolled manganese bronze alloy plate. Then, the plate is cut into agglomerate blanks, the surfaces of the blanks are treated, and graphite lubricant is applied to the surfaces. An equal channel angular extrusion mould whose extrusion channel angle is between 90 degrees to 120 degrees is adopted, the graphite lubricant is applied to the surface of a mold cavity of the mould, the blanks are put in the mould and heated together, and heat is preserved. The blanks are simultaneously taken out of a heating furnace to carry out equal channel angular extrusion. At last, manganese bronze alloy blocks with high intensity, good plasticity, etc. are obtained. The present invention can obviously improve the mechanical property and the tribological property of manganese bronze alloy, and the application range of the alloy is widened so that the alloy better satisfies the requirements of practical production.
Description
Technical field
The present invention relates to a kind of preparation method of micro-grain manganese bronze alloy, adopt the rolling method that combines with the equal channel angular extruding to prepare the micro-grain manganese bronze alloy bulk, improve the mechanical property and the tribological properties thereof such as plasticity, intensity, hardness of manganese bronze alloy, and then the practical engineering application that improves this alloy is worth.Belong to metallic substance and metallurgical class technical field.
Background technology
Industrial manganese bronze has the favorable mechanical performance, can hot, cold conditions press working, and wear-resisting, anti-corrosion, heat-resisting, be applicable to the part that making is at high temperature worked, as vapour pipe, steam valve, sparking plug etc.Along with further developing of science and technology, to the demands for higher performance of this alloy, need further to improve the mechanical property of this alloy, but it is not remarkable to use ordinary method and technology to improve the effect of this alloy property.
Therefore, how the to adopt new technology performance that further improves the manganese bronze material that combines with common process is the primary problem that solves.Studies show that: crystal grain thinning is a kind of effective ways that improve the material internal structure, improve alloy mechanical performance.When grain refining behind 1 μ m, material will show a series of uncommon physics, chemistry, machinery and tribological property, thereby alloy is carried out the researchdevelopment trend that structure refinement is present high performance material.Traditional alloy grain process for refining generally adopts the plastic deformation method, such as forging method, rolling etc.Though traditional viscous deformation technology can refinement manganese bronze alloy grain, when grain refining requires very big viscous deformation during to micron dimension even nanometer scale, traditional Technology of Plastic Processing is difficult to reach requirement.The equal channel angular extrusion process is new in recent years a kind of large plastometric set technology of rising, and it is that mode with pure shear realizes the violent viscous deformation of material.This method can obtain the superfine crystal particle structure of high-angle boundary at material internal, and the material that is obtained is changed in nature; This method can obtain equally distributed crystal grain thinning in whole sample, make the stable performance that extruding back material obtains, material through extruding repeatedly after progressively refinement can obtain micron order crystal grain.As publication number is that the Chinese invention patent of CN1528930 has been introduced a kind of micro fine-grained titanium-nickel-niobium marmen blocks preparation method, utilize the equal channel angular extrusion technique that as cast condition titanium nickel-niobium shape memory alloy is pushed, with forging, other plastic deformation method such as rolling is compared has two unique advantages: blank produces the intensive plastix strain in plastic history; The cross-sectional dimension of blank remains unchanged in deformation process.Can prepare bigger block grained material by this technology.But equal channel angular extrusion process principle and method are more effective to the grain refining of magnesium with good plasticity, copper base alloy, but the grain refining of the metal alloy of plasticity difference is subjected to the restriction of several factors, and misoperation causes blank surface crackle even fracture to occur easily.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of preparation method of micro-grain manganese bronze alloy is provided, and technology is simple, and is with low cost, can significantly improve the mechanical property such as intensity, hardness of manganese bronze alloy, the manganese bronze alloy material that obtained performance is good.
For realizing this purpose, in the technical scheme of the present invention, adopted the rolling method that combines with the equal channel angular extruding, at first raw material is equipped with, under vacuum condition, carry out melting, make manganese bronze alloy strand, then hot rolling is carried out in as cast condition manganese bronze alloy heating back on milling train, make and roll attitude sheet material, again sheet material is cut into block blank, after blank carried out surface treatment and coated graphite lubricant, adopting the squeezing passage angle was that 90～120 ° equal channel angular extrusion die carries out the equal channel angular extruding, finally obtains intensity, well behaved manganese bronze alloy cube matherial such as plasticity.
Micro-grain manganese bronze alloy preparation method of the present invention is specially: with raw material by mass percentage copper be 94.5～98.8%, manganese is 1.2～5.5% to be equipped with, under vacuum condition, carry out melting, make manganese bronze alloy strand, manganese bronze alloy strand is carried out reconditioning handle, guarantee the hot rolling quality to improve cc billet surface quality.Be placed on then and be heated to 500～650 ℃ in the process furnace, reach and on milling train, carry out hot rolling after the temperature and handle, make and roll attitude manganese bronze sheet alloy, will roll attitude manganese bronze sheet alloy and cut into block blank, and blank surface handled make it smooth smooth.With acetone blank is carried out surface cleaning, preheating is 10～20 minutes under 70～120 ℃ temperature, then at the even coated graphite lubricant of blank surface, is placed under 60～100 ℃ the temperature and dries 8～15 minutes.
It is 90～120 ° that the present invention adopts the squeezing passage angle of equal channel angular extrusion die.With acetone mould is carried out surface and die cavity and clean, preheating is 30～50 minutes under 150 ℃ temperature, coated graphite lubricant then, and coat-thickness is wanted evenly.
Because this alloy has plasticity preferably, thereby its equal channel angular extruding can carry out below 500 ℃, and blank and mould can heat jointly under this temperature.The blank that coats oildag is placed in the mould, and blank and mould be heating jointly in 400 ℃～500 ℃ process furnace, and is incubated 1～1.5 hour.The blank and the mould that heat are taken out simultaneously, on universal hydraulic testing machine, blank is pushed.The blank that squeezes out is carried out surface treatment again make it smooth smooth, and to mold cavity and blank coated graphite lubricant, carry out the 2nd extruding again, can obtain the micro-grain manganese bronze alloy bulk, its microcosmic average grain size is 0.2～0.6 μ m.
The present invention adopts the rolling preparation technology who combines with the equal channel angular extruding, as cast condition manganese bronze alloy is carried out the rolling reason earlier, carry out the equal channel angular extruding again, this technology has significantly improved the performance of manganese bronze alloy, and reduced the extruding number of times, can obtain high performance micro-grain manganese bronze alloy after general 2 extruding.Alloy is through after rolling, and material internal defect disappears, and helps the carrying out of equal channel angular extruding.Sample is size constancy before and after extruding, handles simply, and the lumber recovery height, and can realize big workpiece processing.Before the extruding mold cavity and blank to be extruded are lubricated processing respectively, the rapid temperature drop that both can effectively stop blank, can reduce simultaneously the sliding-frictional resistance between blank and mold work surface significantly, thereby improve the flow uniformity of alloy material effectively, guarantee carrying out smoothly of extrusion process; The swabbing processing method is simple, and cost is low, and after actually operating, blank and mould come off voluntarily, do not bond together good manufacturability mutually.The determining and the blank that heats and mould taken out from process furnace simultaneously of blank, mold heated time and soaking time carries out the equal channel angular extruding, can prevent grain growth, help forming tiny manganese bronze micron crystalline substance, finally obtain well behaved manganese bronze alloy cube matherials such as intensity, plasticity.
The preparation method that the present invention adopts the extruding of rolling and equal channel angular to combine, alloy through rolling processing, has reduced the blank subsurface defect before extruding, help the carrying out pushed, and has improved the success ratio of preparation; Be squeezed under 500 ℃ and operate, mould and blank can adopt with a kind of lubricant and common heating, have improved working efficiency.
Embodiment
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
With raw material by mass percentage copper be 98.8%, manganese is 1.2% to be equipped with, under vacuum condition, carry out melting, make manganese bronze alloy strand, the manganese bronze strand carried out being placed on after ball blast, flaw detection, reconditioning are handled be heated to 500 ℃ in the process furnace, on milling train, carry out the hot rolling processing after reaching temperature, make and roll attitude manganese bronze sheet alloy, to roll attitude manganese bronze alloy wire, to cut into cross section be 9.3 * 9.3mm, length is the block blank of 100mm, blank is carried out surface treatment, make smooth surface smooth.With acetone blank surface is carried out surface cleaning, blank is placed on the clean stainless steel pallet, preheating is 15 minutes under 120 ℃ temperature, adopt the method for brushing at the even coated graphite lubricant of blank surface then, coating back blank was dried 10 minutes under 100 ℃ temperature, if occur falling to being coated with, cut, defective such as peel off, then carry out coating or flush away recoat.Is that 120 degree moulds carry out the surface and die cavity cleans with acetone to the extruding angle, and preheating is 40 minutes under 150 ℃ temperature, even then coated graphite lubricant.
The manganese bronze alloy that coats oildag is placed in the mould, and blank and mould be heating jointly in 400 ℃ process furnace, reaches after the temperature insulation 1 hour; The blank and the mould that heat are taken out simultaneously, push on universal hydraulic testing machine rapidly then, the blank that extruding is come out carries out carrying out the 2nd extruding after the surface treatment again, can obtain the micro-grain manganese bronze alloy bulk.
Embodiment 2:
With raw material by mass percentage copper be 98.45%, manganese is 1.55% to be equipped with, under vacuum condition, carry out melting, make manganese bronze alloy strand, the manganese bronze strand carried out being placed on after ball blast, flaw detection, reconditioning are handled be heated to 550 ℃ in the process furnace, on milling train, carry out the hot rolling processing after reaching temperature, make and roll attitude manganese bronze sheet alloy, to roll attitude manganese bronze alloy wire, to cut into cross section be 9.3 * 9.3mm, length is the block blank of 100mm, blank is carried out surface treatment, make smooth surface smooth.With acetone blank surface is carried out surface cleaning, blank is placed on the clean stainless steel pallet, preheating is 15 minutes under 120 ℃ temperature, and the method that adopts brushing is at the even coated graphite lubricant of blank surface then, and the blank after the coating was dried 10 minutes under 100 ℃ temperature.Is that 90 degree moulds carry out surface and die cavity and clean with acetone to the extruding angle, and preheating is 40 minutes under 150 ℃ temperature, coated graphite lubricant then, and coating is even.
The manganese bronze alloy that coats oildag is placed in the mould, and blank and mould be heating jointly in 450 ℃ process furnace, reaches after the temperature insulation 1 hour; The blank and the mould that heat are taken out simultaneously, push on universal hydraulic testing machine rapidly then, the blank that extruding is come out carries out carrying out the 2nd extruding after the surface treatment again, can obtain the micro-grain manganese bronze alloy bulk.
Embodiment 3:
With raw material by mass percentage copper be 95.0%, manganese is 5.0% to be equipped with, under vacuum condition, carry out melting, make manganese bronze alloy strand, the manganese bronze strand carried out being placed on after ball blast, flaw detection, reconditioning are handled be heated to 650 ℃ in the process furnace, on milling train, carry out the hot rolling processing after reaching temperature, make and roll attitude manganese bronze sheet alloy, to roll attitude manganese bronze alloy wire, to cut into cross section be 9.3 * 9.3mm, length is the block blank of 100mm, blank is carried out surface treatment, make smooth surface smooth.With acetone blank surface is carried out surface cleaning, blank is placed on the clean stainless steel pallet, preheating is 15 minutes under 120 ℃ temperature, and the method that adopts brushing is at the even coated graphite lubricant of blank surface then, and the blank after the coating was dried 10 minutes under 100 ℃ temperature.Is that 90 degree moulds carry out the surface and die cavity cleans with acetone to the extruding angle, and preheating is 40 minutes under 150 ℃ temperature, and then even coated graphite lubricant.
The manganese bronze alloy that coats oildag is placed in the mould, and blank and mould be heating jointly in 500 ℃ process furnace, reaches after the temperature insulation 1 hour; The blank and the mould that heat are taken out simultaneously, push on universal hydraulic testing machine rapidly then, the blank that extruding is come out carries out carrying out the 2nd extruding after the surface treatment again, can obtain the micro-grain manganese bronze alloy bulk.
Claims (1)
1. the preparation method of a micro-grain manganese bronze alloy, it is characterized in that: adopt the rolling method that combines with the equal channel angular extruding, with raw material by mass percentage copper be 94.5～98.8%, manganese is 1.2～5.5% to be equipped with, under vacuum condition, carry out melting, make manganese bronze alloy strand, manganese bronze alloy strand is carried out reconditioning to be handled, hot rolling ℃ is carried out in reheat to 500～650, make and roll attitude manganese bronze sheet alloy, to roll attitude manganese bronze sheet alloy and cut into block blank, and blank surface handled make it smooth smooth, with acetone blank is carried out surface cleaning, preheating is 10～20 minutes under 70～120 ℃ temperature, then at the even coated graphite lubricant of blank surface, be placed under 60～100 ℃ the temperature and dried 8～15 minutes; Employing squeezing passage angle is 90～120 ° a equal channel angular extrusion die, with acetone mould is carried out surface and die cavity cleaning, at the even coated graphite lubricant after 30～50 minutes of preheating under 150 ℃ the temperature, then blank is placed in the mould common heating and be incubated 1～1.5 hour in 400 ℃～500 ℃ process furnace, then blank and the mould that heats taken out simultaneously, on universal hydraulic testing machine, blank is pushed; The blank that squeezes out is carried out surface treatment again make it smooth smooth, and to mold cavity and blank coated graphite lubricant, carry out the 2nd extruding again, can obtain the micro-grain manganese bronze alloy bulk, its microcosmic average grain size is 0.2～0.6 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101118105A CN100398682C (en) | 2005-12-22 | 2005-12-22 | Method for preparing micro-grain manganese bronze alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101118105A CN100398682C (en) | 2005-12-22 | 2005-12-22 | Method for preparing micro-grain manganese bronze alloy |
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| CN1789452A CN1789452A (en) | 2006-06-21 |
| CN100398682C true CN100398682C (en) | 2008-07-02 |
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| CNB2005101118105A Expired - Fee Related CN100398682C (en) | 2005-12-22 | 2005-12-22 | Method for preparing micro-grain manganese bronze alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2778130C1 (en) * | 2021-12-21 | 2022-08-15 | Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") | Method for thermomechanical processing of promising copper alloys |
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| JP2003019532A (en) * | 2001-07-02 | 2003-01-21 | Mitsubishi Heavy Ind Ltd | Method and device for manufacturing metallic material of micro-structure |
| CN1425785A (en) * | 2003-01-08 | 2003-06-25 | 华南理工大学 | Magnesium-aluminium-zinc alloy containing rare earth and its preparing method |
| CN1528535A (en) * | 2003-10-16 | 2004-09-15 | 上海交通大学 | Micron fine-grained titanium-nickel-copper alloy block constant-diameter corner extrusion preparation method |
| US20050016243A1 (en) * | 2003-07-25 | 2005-01-27 | Segal Vladimir M. | Method and apparatus for equal channel angular extrusion of flat billets |
| US20050126666A1 (en) * | 2003-12-15 | 2005-06-16 | Zhu Yuntian T. | Method for preparing ultrafine-grained metallic foil |
| CN1681960A (en) * | 2002-07-16 | 2005-10-12 | 霍尼韦尔国际公司 | Copper sputtering targets and methods of forming copper sputtering targets |
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2005
- 2005-12-22 CN CNB2005101118105A patent/CN100398682C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003019532A (en) * | 2001-07-02 | 2003-01-21 | Mitsubishi Heavy Ind Ltd | Method and device for manufacturing metallic material of micro-structure |
| CN1681960A (en) * | 2002-07-16 | 2005-10-12 | 霍尼韦尔国际公司 | Copper sputtering targets and methods of forming copper sputtering targets |
| CN1425785A (en) * | 2003-01-08 | 2003-06-25 | 华南理工大学 | Magnesium-aluminium-zinc alloy containing rare earth and its preparing method |
| US20050016243A1 (en) * | 2003-07-25 | 2005-01-27 | Segal Vladimir M. | Method and apparatus for equal channel angular extrusion of flat billets |
| CN1528535A (en) * | 2003-10-16 | 2004-09-15 | 上海交通大学 | Micron fine-grained titanium-nickel-copper alloy block constant-diameter corner extrusion preparation method |
| US20050126666A1 (en) * | 2003-12-15 | 2005-06-16 | Zhu Yuntian T. | Method for preparing ultrafine-grained metallic foil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2778130C1 (en) * | 2021-12-21 | 2022-08-15 | Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") | Method for thermomechanical processing of promising copper alloys |
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| CN1789452A (en) | 2006-06-21 |
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