CN1059617C - One-step cast shaping appts. and tech. for multi-layer composite material - Google Patents
One-step cast shaping appts. and tech. for multi-layer composite material Download PDFInfo
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- CN1059617C CN1059617C CN98101042A CN98101042A CN1059617C CN 1059617 C CN1059617 C CN 1059617C CN 98101042 A CN98101042 A CN 98101042A CN 98101042 A CN98101042 A CN 98101042A CN 1059617 C CN1059617 C CN 1059617C
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Abstract
The present invention provides a one-step cast shaping method for various multi-layer metal or alloy composite materials and a key technology thereof. The present invention is characterized in that a casting apparatus is composed of 2 to 4 water-cooling crystallizers, 1 to 3 oxidation preventive sleeves, 1 to 3 molten pool induction heaters, an infrared thermoscope, a temperature controller and a dummy ingot machine, wherein all the crystallizers are arranged on the same axial line in the direction of a dummy ingot. The present invention has the advantages that the multi-layer composite materials can be made by one-step cast shaping to realize the shortened composite, and the high-quality composite materials with no mixed oxidized skin dirt or oily dirt on the interface between the layers can be obtained.
Description
The invention provides a kind of method and key technology thereof that various metal or alloy multilayer materials one-step castings are shaped that be used for.
Along with science and technology development, every field such as oil, chemical industry, communications and transportation, building are more and more higher to the instructions for use of material, homogenous material is difficult to satisfy actual the use performance demands in many cases, the material that will have different performance is combined with each other, coming into one's own day by day with the multilayer materials that improves its comprehensive serviceability, is one of the important research direction in 21 century material field.Up to the present, the material method that be combined into one, that be suitable for large-scale industrial production with two or more mainly contains Mechanical Method and plastic deformation method.Mechanical Method is divided edge cover, hydraulic extend pipe, drawing again, and (see: Japan stretches copper association and compiles, copper ぉ ょ び copper alloy basis と industrial technology, (1988), method such as p.190～192), its characteristics are that mechanical bond, interface bond strength are low for the interface of each composite bed, and are not suitable for the preparation of long size composite; The plastic deformation method (see: Chen Yongfu etc., the light-alloy process technology, Vol.24, No.11 (1996), p.37; Wei Yuezhen, composite, China Machine Press, (1987), p.146) though can realize metallurgical binding (or claiming the metallography combination), but obtain non-scale, do not have be mingled with, the compound interface of cleaning is often very difficult fully, and plastic deformation method's production technology is generally very complicated, composite production cost height.These all are unfavorable for the preparation and large-scale commercial Application of high performance composite.
The objective of the invention is to develop a kind of short flow process, energy-conservation, cheap, be applicable to large-scale industrial production, and can obtain to clean fully the multilayer materials one-step casting forming process of compound interface.
Equipment of the present invention constitutes, by water mold (1,5,9), oxidation protection cover (2,6), molten bath (3,8), induction heater (4,7) form, the number of total crystallizer is 2～4, and the number of total protective jacket is 1～3,1～3 of total number side, molten bath, the number of total induction heater is 1～3.It is characterized in that crystallizer (1,5,9) is disposed on the same axis along the dummy ingot direction; Protective jacket (2,6) upper end closely is connected with crystallizer, 1～200mm under the adjacent metal bath surface is stretched in the lower end of protective jacket, the total length of protective jacket is that (corresponding to the lower surface of crystallizer (1) and the lower surface of distance between metal bath (18) liquid level and crystallizer (5) and the distance between metal bath (16) liquid level is 49～999mm) to 50～1000mm, and the internal diameter of protective jacket is than the big 0.1～10mm of internal diameter of the crystallizer that is attached thereto; Metal bath (16,18) in the molten bath (3,8) can pass through induction heater (4,7) and be incubated and heat.
Adopt technical process of the present invention to be: core (10) is solidification forming in crystallizer (1), solidify back core (10) under the protective effect of oxidation protection cover (2), the clean surface that keeps non-scale, no greasy dirt to be mingled with enters metal bath (18), and is compound with first clad (11) in crystallizer (5); The composite of being made up of the core and first clad is under the protective effect of oxidation protection cover (6), and the state that keeps surperficial non-scale, no greasy dirt to be mingled with enters metal bath (16), and is compound with second clad (12) in crystallizer (9) then.Core and the required cooling velocity of each clad are controlled by the dummy ingot speed ν=1～2500mm/min of dummy ingot machine, the water-cooled intensity and the induction heater (4,7) of each crystallizer.In addition, can charge into inert gases such as argon gas as required in the gap between oxidation protection cover (2) and core surface (13), oxidation protection cover (6) and first cover surface (14) protects.Whole cast form process can adopt Artificial Control or computer control.
The invention has the advantages that:
1. water mold (1,5,9) is respectively applied for the solidification forming of core (10), first clad (11), second clad (12), thereby realizes that the multilayer materials one-step casting is shaped.Method of the present invention can be used for the multilayer materials of various metals and metal, Metal and Alloy, alloy and alloy, and the tool and mould of composite roll one class, the cast form of parts, reaches short flow process, energy saving purposes.
2. adopt protective jacket (2,6), the surface (14) that is respectively applied for the surface (13) that prevents core (10), first clad (11) produces oxidation and pollution, thereby obtains non-scale, do not have the compound interface of cleaning fully that is mingled with, and improves the quality of composite greatly.
3. for the metal bath (16,18) of solidify out into clad (11,12), adopt molten bath (3,8) and induction heater (4,7) to be incubated respectively and heat, can realize the setting rate adjusting of core and each clad effectively, to guarantee to stablize cast form.
4. by regulating oxidation protection cover (2,6) length, and utilize induction heater (4,7) Jia Re Kelvin effect, can control clad (11,12) and when solidifying, produce the approximate reverse solidification (liquid-solid boundary (15 in the crystallizer (5,9), 17) with crystallizer (1) in liquid-solid boundary (19) be opposite trend), help preventing produce shrinking cavity and crackle at compound interface.
5. of the present invention applied widely, both can be used for metallurgical industry large-scale production, can be used for the hot investment casting of various special industries and purposes again.
The present invention is further illustrated below in conjunction with accompanying drawing:
Fig. 1 is a kind of layout of equipment of the present invention.Wherein (1,5,9) are water mold; (2,6) are the oxidation protection cover, adopt pottery (containing metal pottery), carbide alloy or high temperature alloy to make; (3,8) are the molten bath, adopt refractory material to make; (4,7) are medium frequency induction heater, have infrared measurement of temperature and temperature controlling instruments; (10) be core; (11,12) are respectively first, second clad; (13,14) are respectively the core and first cover surface, also are compound interfaces simultaneously; (15,17,19) are liquid-solid boundary.As required, the number of general total crystallizer is 2～4, and the number of total protective jacket is 1～3, and total molten bath number is 1～3, and the number of total induction heater is 1～3.The freezing point that the temperature of metal bath (16,18,20) generally is controlled at respective metal or alloy is to 200～500 ℃ scope more than the freezing point.
Embodiment:
1. stainless steel coated carbon steel bar continuous casting is shaped
No. 45 carbon steel core diameter 30mm, 1Cr18Ni9 stainless steel coating layer thickness 5mm.Adopt 2 mould casting to be shaped, its medium carbon steel melt (20) is frozen into core (10) by crystallizer (1), and stainless steel melt (18) is frozen into clad (11) by crystallizer (5).The length of selecting oxidation protection cover (2) for use is 200mm, the internal diameter of oxidation protection cover is than the big 1.0mm of internal diameter of coupled crystallizer, the cooling water flow velocity of crystallization control device (1) is 12m/s, regulate continuous casting casting speed ν=25mm/min, when making the surface temperature of carbon steel core (10) in entering melt (18) than low 100 ℃ of molten stainless steel phase line, regulate the power of medium frequency induction heater (4) simultaneously, the shape and the position of the interior liquid-solid boundary of crystallization control device (5), make interior stainless the solidifying of crystallizer (5) be approximately reverse solidification, can obtain high-quality continuous casting composite bar.
2. three layers of composite roll D.C.casting are shaped
Three floor composite roll are made up of cover (11) and rich chromium cast iron overcoat (12) in spheroidal graphite cast-iron roller core (10), No. 45 steel, and the diameter of roller core (10) is 350mm, middle cover (11) thickness 25mm, overcoat (12) thickness 50mm.Adopt 3 mould casting to be shaped, wherein spheroidal graphite cast-iron melt (20) is frozen into roller core (10) by crystallizer (1), No. 45 steel melts (18) are frozen into middle cover (11) by crystallizer (5), and rich chromium cast iron melt (16) is frozen into overcoat (12) by crystallizer (9).Select oxidation protection cover (2 for use, 6) length is respectively 300mm and 200mm, the internal diameter of oxidation protection cover is than each big 2.0mm of internal diameter of coupled crystallizer, crystallization control device (1,5) cooling water flow velocity is 12m/s, regulate continuous casting casting speed ν=25mm/min, make the surface temperature of spheroidal graphite cast-iron roller core (10) than low 200 ℃ of its solidus temperature, the surface temperature of overlapping clad (11) in No. 45 steel is than low 250 ℃ of its solidus temperature, regulate medium frequency induction heater (4 simultaneously, 7) power, crystallization control device (5,9) shape of interior liquid-solid boundary and position, make interior the solidifying of metal of each crystallizer be approximately reverse solidification, can obtain to have three layers of composite roll of high-quality of complete clean interface.
Claims (2)
1. multilayer materials one-step casting former, by water mold (1,5,9), oxidation protection cover (2,6), molten bath (3,8), induction heater (4,7) form, the number of total crystallizer is 2～4, and the number of total protective jacket is 1～3, total molten bath number is 1～3, and the number of total induction heater is 1～3; It is characterized in that crystallizer (1,5,9) is disposed on the same axis along the dummy ingot direction; Protective jacket (2,6) upper end closely is connected with crystallizer, 1～200mm under the adjacent metal bath surface is stretched in the lower end of protective jacket, the total length of protective jacket is 50～1000mm, corresponding to the lower surface of crystallizer (1) and the lower surface of distance between metal bath (18) liquid level and crystallizer (5) and the distance between metal bath (16) liquid level is 49～999mm, and the internal diameter of protective jacket is than the big 0.1～10mm of internal diameter of the crystallizer that is attached thereto; Metal bath (16,18) in the molten bath (3,8) can pass through induction heater (4,7) and be incubated and heat.
2. multilayer materials one-step casting forming technology, it is characterized in that core (10) solidification forming in crystallizer (1), solidify back core (10) under the protective effect of oxidation protection cover (2), the clean surface that keeps non-scale, no greasy dirt to be mingled with enters metal bath (18), and is compound with first clad (11) in crystallizer (5); The state that the composite of being made up of the core and first clad keeps surperficial non-scale, no greasy dirt to be mingled with under the protective effect of oxidation protection cover (6) enters metal bath (16), and is compound with second clad (12) in crystallizer (9) then; Core and the required cooling velocity of each clad are controlled by the dummy ingot speed ν=1～2500mm/min of dummy ingot machine, the water-cooled intensity and the induction heater (4,7) of each crystallizer; Can charge into inert gases such as argon gas as required in the gap between oxidation protection cover (2) and core surface (13), oxidation protection cover (6) and first cover surface (14) protects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101042A CN1059617C (en) | 1998-03-20 | 1998-03-20 | One-step cast shaping appts. and tech. for multi-layer composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101042A CN1059617C (en) | 1998-03-20 | 1998-03-20 | One-step cast shaping appts. and tech. for multi-layer composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1229703A CN1229703A (en) | 1999-09-29 |
| CN1059617C true CN1059617C (en) | 2000-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN98101042A Expired - Fee Related CN1059617C (en) | 1998-03-20 | 1998-03-20 | One-step cast shaping appts. and tech. for multi-layer composite material |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1538993A1 (en) * | 1987-12-01 | 1990-01-30 | Институт Электросварки Им.Е.О.Патона | Method of producing multilayer ingot |
| SU1748931A1 (en) * | 1990-09-07 | 1992-07-23 | Институт проблем литья АН УССР | Casting mould for manufacture of multilayer castings |
-
1998
- 1998-03-20 CN CN98101042A patent/CN1059617C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1538993A1 (en) * | 1987-12-01 | 1990-01-30 | Институт Электросварки Им.Е.О.Патона | Method of producing multilayer ingot |
| SU1748931A1 (en) * | 1990-09-07 | 1992-07-23 | Институт проблем литья АН УССР | Casting mould for manufacture of multilayer castings |
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| CN1229703A (en) | 1999-09-29 |
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