CN101503010A - Steel ring wear-resistant casting parts and method for producing the same - Google Patents
Steel ring wear-resistant casting parts and method for producing the same Download PDFInfo
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- CN101503010A CN101503010A CNA2009100582181A CN200910058218A CN101503010A CN 101503010 A CN101503010 A CN 101503010A CN A2009100582181 A CNA2009100582181 A CN A2009100582181A CN 200910058218 A CN200910058218 A CN 200910058218A CN 101503010 A CN101503010 A CN 101503010A
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Abstract
A steel ring type wear resistance casting and manufacturing method thereof belong to the field of roll casting, aiming to solve the problems of high cost and mass deficiency of roll surface quality existing in the prior art. The casting comprises an inner and an outer layer, wherein the inner layer is a metallic material with low alloy, low rigidity and high strength, and the outer layer is a metallic material with high alloy, high rigidity and high abrasive resistance; the diameter is in the range between phi 1700 mm and phi 2200 mm; the manufacturing method thereof includes the followings: a. a metal casting mold and an upper and a lower end covers are fixed according to the designed diameter on a centrifugal tray; b. fluent metal is injected at the molten metal filling opening of the upper end cover, centrifugation is firstly carried out to pour the outer layer, centrifugation is then carried out to pour the inner layer, and the ring type abrasive resistance casting is manufactured; in step b, the pouring temperature at the outer layer is 1280 to 1450 DEG C, the pouring temperature at the inner layer is 1300 to 1500 DEG C, and the pouring interval between the outer layer and the inner layer is 20 to 60 minutes. The invention can be widely applied to metallurgy and building industries so as to meet the requirements for large abrasive resistance castings.
Description
Technical field
The invention belongs to the roll casting field, particularly a kind of steel ring wear-resistant casting parts and preparation method thereof.
Background technology
The application and the service condition difference of big shaped steel, ferrous metal ring wear-resistant casting parts, its working lining hardness, wearability, resistance to elevated temperatures and matching requirements all there is difference, big shaped steel, iron hoop series products that the horizontal centrifugal composite casting technology of present domestic employing is produced, its diameter are all at Φ below 1500.
Domestic enterprise produces this type of large-scale steel, iron hoop series products at present, all be to select expensive high-alloy metal material for use, adopt traditional well-established law monoblock cast mode, its production material cost height at first, the roll surface dreg defect is comparatively outstanding, and roll surface hardness, uniformity and anti-wear performance thereof are also not as good as centrifugal joint product, its internal layer position hardness height of while, plasticity index is relatively also much lower, can't satisfy the matching requirements of the big magnitude of interference, and the accident of assembling cracking happens occasionally.
Summary of the invention
The objective of the invention is to solve the cost height of prior art existence, the problem of roll surface mass deficiency, a kind of compound steel ring wear-resistant casting parts and preparation method thereof is provided, can realize outer high alloy, high rigidity, high-wear resistance, internal layer low-alloy, soft, high strength, good plasticity and toughness index, effectively reduce production costs, improve wear resistance castings and the assembly performance of forging axle.
Purpose of the present invention realizes by following technical proposals:
Steel ring wear-resistant casting parts, two-layer inside and outside comprising, internal layer is low-alloy, soft, high-intensity metal material, skin is the metal material of high alloy, high rigidity, high-wearing feature.
The diameter range of described foundry goods is Φ 1700～Φ 2200mm.
Described skin is any metal material in rich chromium cast iron, cast steel with high chromium, alloy half steel, the alloy nodular cast iron.
Described internal layer is any metal material in low-alloy spheroidal graphite cast-iron, the spheroidal graphite steel.
The preparation method of steel ring wear-resistant casting parts is characterized in that, comprises the steps:
A. on centrifugal pallet according to the fixed diameter metal mold mould and the end cap up and down of design;
B. the molten metal inlet from upper end cover injects liquid metal, first centrifugal casting skin, and the centrifugal casting internal layer is made ring wear-resistant casting parts again.
Among the described step b, the rotating speed of centrifuge is chosen by following formula:
n
2＝179000×G÷D
Wherein: n---centrifuge speed, i.e. casting mold rotating speed, unit: rev/min
G---gravity coefficient, value 100～140
D---casting mold internal diameter, unit: cm.
Among the described step b, outer field pouring temperature is 1280～1450 ℃.
Among the described step b, the pouring temperature of internal layer is 1300～1500 ℃.
Among the described step b, be 20～60 minutes cast blanking time of outer and internal layer.
Among the described step b, outer and internal layer coagulation forming under the apocarpy of rotation at a high speed, and after step b, also comprise annealing, normalizing, tempering process.
The present invention adopts the composite construction of internal layer, outer different metal material, make skin can satisfy high rigidity, high-wear resistance, internal layer can satisfy soft, high strength, good plasticity and toughness index, and can avoid the whole expensive problem that adopts the high-alloy metal material to be brought of prior art, can make diameter greater than 1500mm, and reach 1700～2200mm; Adopt method of the present invention, can solve the good metallurgical binding of ectonexine metal, prevent the diffusion of outer field high alloy, high carbide simultaneously to the internal layer core, realize outer high alloy, high rigidity, high-wear resistance, internal layer low-alloy, soft, high strength, good plasticity and toughness index, thereby effectively improve service life, reduce production costs.
As seen, adopt structure of the present invention and method, can reduce the cost of steel ring wear-resistant casting parts, improve its performance, prolong its service life, can be widely used in metallurgy, building material industry, to satisfy demand to large-scale wear resistance castings.
Description of drawings
Fig. 1 is the structure and the preparation method schematic diagram of medium casting of the present invention;
Number in the figure: the 1st, centrifugal pallet, the 2nd, the metal mold mould, the 3rd, upper end cover, the 4th, outer, the 5th, internal layer, the 6th, bottom end cover, the 7th, molten metal inlet.
The specific embodiment
The present invention is further illustrated below in conjunction with specific embodiments and the drawings.
As shown in Figure 1, it is inside and outside two-layer that steel ring wear-resistant casting parts comprises that described foundry goods comprises, internal layer 5 is made for low-alloy, soft, high-intensity metal material, and skin 4 is made for the metal material of high alloy, high rigidity, high-wearing feature.
The diameter range of above-mentioned foundry goods is Φ 1700～Φ 2200mm, as Φ 1700mm, Φ 1800mm, Φ 1900mm, Φ 2000mm, Φ 2100mm, Φ 2200mm.
Above-mentioned outer 4 is any metal material in rich chromium cast iron, cast steel with high chromium, alloy half steel, the alloy nodular cast iron; Above-mentioned internal layer 5 is any metal material in low-alloy spheroidal graphite cast-iron, the spheroidal graphite steel.
The preparation method of steel ring wear-resistant casting parts comprises the steps:
Earlier with intermediate frequency or line frequency furnace with internal layer and outer field metal material melting.
Adopt van-type mould drying kiln to dry on metal mold mould 2 again, temperature is in 350～500 ℃ of scopes.
On centrifugal pallet 1,, and select a kind of composite layer paint that carries out in zircon sand coating, quartz sand coating, the high alumina coating paint for use according to fixed diameter metal mold mould 2, upper end cover 3 and the bottom end cover 6 of design.
Start centrifuge, determine that by following formula rotating speed drives centrifugal pallet:
n
2＝179000×G÷D
Wherein: n---the casting mold rotating speed, unit: rev/min
G---gravity coefficient, value 100～140
D---casting mold internal diameter, unit: cm.
Inject outer used liquid metal earlier from the molten metal inlet 7 of upper end cover 3, to pour into a mould skin, and control 1280～1450 ℃ of its pouring temperatures, the value of concrete pouring temperature is determined general span: T according to the liquidus temperature difference of the above-mentioned metal material that is adopted
L+ 50～100 ℃, T wherein
LBe liquidus temperature.
20～60 minutes at interval, concrete time value was decided according to the solidus temperature of outer layer thickness and different metal material, general span: T
s-50～100 ℃, T wherein
sBe solidus temperature.
Continuation is from the molten metal inlet 7 of the upper end cover 3 used liquid metal of internal layer that reinjects, with the cast internal layer, and control 1300～1500 ℃ of its pouring temperatures, the value of concrete pouring temperature is determined general span: T according to the liquidus temperature difference of the above-mentioned metal material that is adopted
L+ 50～100 ℃.
Under the apocarpy of rotation at a high speed, make internal layer, outer coagulation forming.
According to different metal material and product design requirement, can also comprise heat treatment and machining steps such as annealing, normalizing, tempering.
Claims (10)
1, steel ring wear-resistant casting parts is characterized in that, described foundry goods comprises inside and outside two-layer, and internal layer is low-alloy, soft, high-intensity metal material, and skin is the metal material of high alloy, high rigidity, high-wearing feature.
2, steel ring wear-resistant casting parts according to claim 1 is characterized in that the diameter range of described foundry goods is Φ 1700～Φ 2200mm.
3, as steel ring wear-resistant casting parts as described in right claim 1 or 2, it is characterized in that described skin is any metal material in rich chromium cast iron, cast steel with high chromium, alloy half steel, the alloy nodular cast iron.
4, as steel ring wear-resistant casting parts as described in the claim 3, it is characterized in that described internal layer is any metal material in low-alloy spheroidal graphite cast-iron, the spheroidal graphite steel.
5, the preparation method of steel ring wear-resistant casting parts is characterized in that, comprises the steps:
A. on centrifugal pallet according to the fixed diameter metal mold mould and the end cap up and down of design;
B. the molten metal inlet from upper end cover injects liquid metal, first centrifugal casting skin, and the centrifugal casting internal layer is made ring wear-resistant casting parts again.
6, as the preparation method of steel ring wear-resistant casting parts as described in the claim 5, it is characterized in that among the described step b, the rotating speed of centrifuge is chosen by following formula:
n
2＝179000×G÷D
Wherein: n---centrifuge speed, i.e. casting mold rotating speed, unit: rev/min
G---gravity coefficient, value 100～140
D---casting mold internal diameter, unit: cm.
7, as the preparation method of steel ring wear-resistant casting parts as described in the claim 6, it is characterized in that among the described step b, outer field pouring temperature is 1280～1450 ℃.
8, as the preparation method of steel ring wear-resistant casting parts as described in the claim 7, it is characterized in that among the described step b, the pouring temperature of internal layer is 1300～1500 ℃.
As the preparation method of steel ring wear-resistant casting parts as described in the claim 8, it is characterized in that 9, among the described step b, be 20～60 minutes cast blanking time of outer and internal layer.
10, as the preparation method of steel ring wear-resistant casting parts as described in the claim 9, it is characterized in that, among the described step b, outer and internal layer coagulation forming under the apocarpy of rotation at a high speed, and after step b, also comprise annealing, normalizing, tempering process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910058218A CN101503010B (en) | 2009-01-21 | 2009-01-21 | Steel ring wear-resistant casting parts and method for producing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910058218A CN101503010B (en) | 2009-01-21 | 2009-01-21 | Steel ring wear-resistant casting parts and method for producing the same |
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| CN101503010A true CN101503010A (en) | 2009-08-12 |
| CN101503010B CN101503010B (en) | 2012-10-03 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069152A (en) * | 2010-12-22 | 2011-05-25 | 宁夏共享集团有限责任公司 | Modeling method of large-size ring-structure casting |
| CN102847906A (en) * | 2012-09-29 | 2013-01-02 | 芜湖新兴铸管有限责任公司 | High-quality centrifugal casting method for steel pipe blank |
| CN102912210A (en) * | 2012-11-02 | 2013-02-06 | 徐宏亮 | Production method for multi-element alloy steel |
| CN103934427A (en) * | 2014-04-18 | 2014-07-23 | 辽宁永达有色铸造有限公司 | Centrifugal casting method for asymmetric annular high-lead bronze casting |
| CN105268938A (en) * | 2014-07-04 | 2016-01-27 | 江苏双勤民生冶化设备制造有限公司 | Vertical centrifugal casting device for manufacturing concentric reducers |
| CN105543655A (en) * | 2015-12-24 | 2016-05-04 | 中钢集团邢台机械轧辊有限公司 | High-chromium alloy centrifugal roller ring for universal profile steel and manufacturing method of high-chromium alloy centrifugal roller ring |
| CN109047798A (en) * | 2018-08-06 | 2018-12-21 | 宁波市鄞州兴韩机械实业有限公司 | A kind of mechanical main shaft and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057949C (en) * | 1997-02-05 | 2000-11-01 | 杜永康 | Bimetallic centrifugal casting process for cylindrical casting |
| CN1111609C (en) * | 1999-05-21 | 2003-06-18 | 吴承健 | Centrifugal casting process of producing antiwear composite multicomponent alloy-cast iron roller ring |
| CN1212204C (en) * | 2003-05-29 | 2005-07-27 | 安泰科技股份有限公司 | Composite roll ring of high-speed steel |
-
2009
- 2009-01-21 CN CN200910058218A patent/CN101503010B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069152A (en) * | 2010-12-22 | 2011-05-25 | 宁夏共享集团有限责任公司 | Modeling method of large-size ring-structure casting |
| CN102847906A (en) * | 2012-09-29 | 2013-01-02 | 芜湖新兴铸管有限责任公司 | High-quality centrifugal casting method for steel pipe blank |
| CN102847906B (en) * | 2012-09-29 | 2014-06-11 | 芜湖新兴铸管有限责任公司 | High-quality centrifugal casting method for steel pipe blank |
| CN102912210A (en) * | 2012-11-02 | 2013-02-06 | 徐宏亮 | Production method for multi-element alloy steel |
| CN102912210B (en) * | 2012-11-02 | 2014-12-10 | 徐宏亮 | Production method for multi-element alloy steel |
| CN103934427A (en) * | 2014-04-18 | 2014-07-23 | 辽宁永达有色铸造有限公司 | Centrifugal casting method for asymmetric annular high-lead bronze casting |
| CN103934427B (en) * | 2014-04-18 | 2016-08-24 | 辽宁永达有色铸造有限公司 | A kind of centre spinning method of asymmetric ring-type high-lead bronze foundry goods |
| CN105268938A (en) * | 2014-07-04 | 2016-01-27 | 江苏双勤民生冶化设备制造有限公司 | Vertical centrifugal casting device for manufacturing concentric reducers |
| CN105543655A (en) * | 2015-12-24 | 2016-05-04 | 中钢集团邢台机械轧辊有限公司 | High-chromium alloy centrifugal roller ring for universal profile steel and manufacturing method of high-chromium alloy centrifugal roller ring |
| CN105543655B (en) * | 2015-12-24 | 2018-01-05 | 中钢集团邢台机械轧辊有限公司 | H-Beam Rolling Mill high-chromium alloy anticentripetal roll collar and its manufacture method |
| CN109047798A (en) * | 2018-08-06 | 2018-12-21 | 宁波市鄞州兴韩机械实业有限公司 | A kind of mechanical main shaft and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN101503010B (en) | 2012-10-03 |
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