CN1307016C - Composite material tup and its casting method - Google Patents
Composite material tup and its casting method Download PDFInfo
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- CN1307016C CN1307016C CNB2005100961480A CN200510096148A CN1307016C CN 1307016 C CN1307016 C CN 1307016C CN B2005100961480 A CNB2005100961480 A CN B2005100961480A CN 200510096148 A CN200510096148 A CN 200510096148A CN 1307016 C CN1307016 C CN 1307016C
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- tup
- particle
- composite material
- molten metal
- vertical centrifugal
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Abstract
The present invention relates to a composite material tup and a casting method thereof. Firstly, a tup mould is arranged on a rotary plate of a vertical centrifugal casting machine; a metal mother body material is smelted by an electric furnace to form a metal liquid; before the metal liquid is taken out of the furnace, the vertical centrifugal casting machine is started, and the rotary speed is controlled to be from 50 to 200 r/min; then, the metal liquid is taken out of the furnace for casting; when the metal liquid is cast, WC particles are simultaneously added into the metal liquid; after casting finishes, the rotary speed of the vertical centrifugal casting machine is enhanced to 500 to 900 r/min; after the vertical centrifugal casting machine rotates for 3 to 10 min, the vertical centrifugal casting machine is stopped for cooling. The composite material tup obtained by the preparation method of the present invention has a tup end, namely a working surface or a striking surface, made from a WC particle reinforced composite material; the hardness of the composite material layer is from HRC55 to 67, and the thickness is from 6 to 20mm; the composite material layer has excellent shock resistance performance and abrasion resistance performance; an interface between the composite material layer and a metal mother body, and an interface between the WC particles in the composite material layer and a substrate are in favorable metallurgical combination, and the combination strength is high. The distribution of the WC particles is uniform, and the adjustable range of the volume fraction of the WC particles is from 18% to 52%.
Description
Technical field
The present invention relates to a kind of manufacture method of grinder hammerhead, particularly a kind of composite material hammer head and casting method thereof.
Background technology
Hammer mill is industries such as metallurgy, mine, building materials and electric power disintegrating apparatus commonly used, tup is wherein main vulnerable part, its operation principle is to rely on the tup of rotation at a high speed to clash into the purpose that enters the material in the cracking cabin and reach comminuting matter, and the main failure forms of tup is wearing and tearing and fracture.For a long time, the wear resistence of grinder hammerhead is poor, and service life is short, changes frequently, is the key factor of restriction material crush efficiency.Therefore development of new hammer head material and shape technology becomes problem demanding prompt solution the service life of improving tup.
The grinder hammerhead of present domestic employing mainly contains the monoblock cast tup: related material has potassium steel (Mn13), medium carbon alloy steel (Chinese invention patent CN1050566A), abrasion resistant Mn-W-Ti casting steel (Chinese invention patent CN1068637C), low-alloy steel (40CrMnSiMoRe), high carbon chromium nickel-molybdenum alloy steel and rich chromium cast iron etc.; Composite hammer head: comprise double-fluid double metal composite casting tup, castingin or inlay or the box-like tup of soldering group (Chinese utility model patent CN2257218Y, CN2564248Y); Surface overlaying or whole built-up welding tup (Chinese invention patent CN1419990A, CN1517173A).For monoblock cast steel alloy tup, although it has high obdurability, is difficult for rupturing in running, because the integral hardness of tup is lower, and no hard exists mutually in the tissue, so wear no resistance, service life is short.Although people attempt to improve the wear resistence of tup by adjusting measures such as alloying component and improvement Technology for Heating Processing, consequently manufacturing cost significantly increases, and the wear resistence raising is very little; For monoblock cast rich chromium cast iron tup, easy fracture in service then is the main cause of its premature failure; So-called composite hammer head, be meant with a kind of material of high rigidity such as rich chromium cast iron or carbide alloy and a kind of steel alloy with obdurability or carbon steel by composite casting, weld or method such as inlay and combine and be made into tup, wherein improving the wear resistence of tup, and the obdurability material prevents the fracture of tup to high hardness material as the hammer handle of tup as the scope of attack of tup.This class tup manufacturing process complexity, cost height (all the more so) for carbide alloy, and technology stability is poor, defective such as easily crack, stress is concentrated at binding site, therefore being in operation tends to take place two kinds of materials and separates from the junction, causes the premature failure of tup; The built-up welding tup is to adopt the special antiwear welding rod to have the wearing course of high rigidity at the end of steel alloy or carbon steel tup (scope of attack or working face) built-up welding one deck, its shortcoming is the bead-welding technology complexity, technique controlling difficulty is big, have a large amount of micro-cracks in the overlay cladding, be mingled with, defective such as pore, therefore overlay cladding in service to peel off and fall piece be its main failure forms.
The steel alloy tup of this company of West Germany uncle power turtledove and the rich chromium cast iron-low-carbon alloy steel composite casting tup of Japanese river island company are arranged in the world, and the former wearability is relatively poor, and the latter is because composite casting is prone to the iron and steel break-off.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of wear resistence height is provided, easy fracture and peeling off not in the use, composite bed and metal carrier body are the composite material hammer head and the casting method thereof of metallurgical binding.
For achieving the above object, the technical solution used in the present invention is: at first the tup mould is installed on the rotating disk of vertical centrifugal casting machine, adopt electro-smelting metal carrier body material to form molten metal, the tapping temperature of molten metal is 1500 ℃～1680 ℃, and pouring temperature is 1380 ℃～1500 ℃; Before molten metal is come out of the stove, start the vertical centrifugal casting machine, the rotating speed of vertical centrifugal casting machine is controlled at 50～200 rev/mins, the molten metal cast of coming out of the stove then, poring rate is 5～28kg/s, the WC particle (tungsten carbide) that with granularity is 300 μ m～750 μ m in casting of molten metal joins in the molten metal with stream, and the flow-control of WC particle is at 20～100g/s;
The addition of WC particle is calculated according to following formula:
W＝S·h·f
v·ρ
In the formula: W is the weight of WC particle, g;
S is the surface area of tup end face (working face or the scope of attack), mm
2
H is the thickness of composite bed, 6～20mm;
f
vBe the volume fraction of WC particle in the composite bed, 18%～52%;
ρ is the density of WC particle, g/mm
3
Rotating speed with the vertical centrifugal casting machine after cast finishes is increased to 500～900r/min, rotates 3～10min, shuts down cooling and gets final product.
Metal carrier body material of the present invention is potassium steel, steel alloy or ordinary carbon steel; The hardness of WC particle is 2500～3000Hv, and density is 15.8～16.5g/mm
3
According to the composite material hammer head of method casting of the present invention, the hammer body of tup is potassium steel, steel alloy or ordinary carbon steel, and the hammer tip of tup is that the working face or the scope of attack are the WC particle reinforced composite, and composite layer hardness is HRC55～67, and thickness is 6-20mm.
The composite material hammer head that adopts preparation method of the present invention to obtain has excellent impact wear resistance; Composite layer hardness is HRC55～67, the composite layer thickness is 6-20mm, WC particle is excellent metallurgical with the interface of matrix and combines in the interface of composite layer and metal carrier body and the composite layer, the bond strength height, WC particle is evenly distributed, and the grain volume fraction adjustable extent is 18%～52%; The hammer head of hammer crusher that the present invention produces, its life-span is 5～10 times of traditional potassium steel tup; The PLJ formula disintegrating machine jet liner plate (a kind of form of tup) that the present invention produces, its life-span is 3～6 times of Cr20 rich chromium cast iron.
The specific embodiment
Embodiment 1: the moulding of at first adopting resin sand to carry out tup is the manufacturing of tup mould, then the tup mould is installed on the rotating disk of vertical centrifugal casting machine, adopt 250kg medium-frequency induction furnace melting potassium steel to form molten metal, the tapping temperature of molten metal is 1600 ℃, and pouring temperature is 1500 ℃; Before molten metal is come out of the stove, start the vertical centrifugal casting machine, the rotating speed of vertical centrifugal casting machine is controlled at 200 rev/mins, the molten metal cast of coming out of the stove then, poring rate is 28kg/s, is 2500～3000Hv with hardness in casting of molten metal, and density is 15.8～16.5g/mm
3, granularity is that the WC particle of 300 μ m～750 μ m joins in the molten metal with stream, the flow-control of WC particle is at 50g/s;
The addition W=Shf of WC particle
vρ
In the formula: W is the weight g of WC particle;
S is the surface area mm of tup end face (working face or the scope of attack)
2
H is the thickness 6～20mm of composite bed;
f
vVolume fraction 18%～52% for WC particle in the composite bed;
ρ is the density g/mm of WC particle
3
Rotating speed with the vertical centrifugal casting machine after cast finishes is increased to 800 rev/mins, rotates 4 minutes, shuts down cooling and gets final product.This moment since the density of WC particle much larger than the density of molten metal, under action of centrifugal force, WC particle priority migration to the outer surface (end face of tup) of foundry goods forms surface composite layer.
Embodiment 2: the moulding of at first adopting water-glass sand to carry out tup is the manufacturing of tup mould, then the tup mould is installed on the rotating disk of vertical centrifugal casting machine, adopt 250kg medium-frequency induction furnace molten alloy steel to form molten metal, the tapping temperature of molten metal is 1520 ℃, and pouring temperature is 1420 ℃; Before molten metal is come out of the stove, start the vertical centrifugal casting machine, the rotating speed of vertical centrifugal casting machine is controlled at 160 rev/mins, the molten metal cast of coming out of the stove then, poring rate is 16kg/s, is 2500～3000Hv with hardness in casting of molten metal, and density is 15.8～16.5g/mm
3, granularity is that the WC particle of 300 μ m～750 μ m joins in the molten metal with stream, the flow-control of WC particle is at 70g/s;
The addition W=Shf of WC particle
vρ
In the formula: W is the weight g of WC particle;
S is the surface area mm of tup end face (working face or the scope of attack)
2
H is the thickness 6～20mm of composite bed;
f
vVolume fraction 18%～52% for WC particle in the composite bed;
ρ is the density g/mm of WC particle
3
Rotating speed with the vertical centrifugal casting machine after cast finishes is increased to 600 rev/mins, rotates 8 minutes, shuts down cooling and gets final product.
Embodiment 3: the moulding of at first adopting resin sand to carry out tup is the manufacturing of tup mould, then the tup mould is installed on the rotating disk of vertical centrifugal casting machine, adopt 250kg medium-frequency induction furnace melting ordinary carbon steel to form molten metal, the tapping temperature of molten metal is 1550 ℃, and pouring temperature is 1450 ℃; Before molten metal is come out of the stove, start the vertical centrifugal casting machine, the rotating speed of vertical centrifugal casting machine is controlled at 50 rev/mins, the molten metal cast of coming out of the stove then, and poring rate is 9kg/s, is 2500～3000Hv with hardness in casting of molten metal, density is 15.8～16.5g/mm
3, granularity is that the WC particle of 300 μ m～750 μ m joins in the molten metal with stream, the flow-control of WC particle is at 20g/s;
The addition W=Shf of WC particle
vρ
In the formula: W is the weight g of WC particle;
S is the surface area mm2 of tup end face (working face or the scope of attack);
H is the thickness 6～20mm of composite bed;
f
vVolume fraction 18%～52% for WC particle in the composite bed;
ρ is the density g/mm of WC particle
3
Rotating speed with the vertical centrifugal casting machine after cast finishes is increased to 500 rev/mins, rotates 10 minutes, shuts down cooling and gets final product.
Embodiment 4: the moulding of at first adopting water-glass sand to carry out tup is the manufacturing of tup mould, then the tup mould is installed on the rotating disk of vertical centrifugal casting machine, adopt 250kg medium-frequency induction furnace melting potassium steel to form molten metal, the tapping temperature of molten metal is 1500 ℃, and pouring temperature is 1380 ℃; Before molten metal is come out of the stove, start the vertical centrifugal casting machine, the rotating speed of vertical centrifugal casting machine is controlled at 80 rev/mins, the molten metal cast of coming out of the stove then, and poring rate is 20kg/s, is 2500～3000Hv with hardness in casting of molten metal, density is 15.8～16.5g/mm
3, granularity is that the WC particle of 300 μ m～750 μ m joins in the molten metal with stream, the flow-control of WC particle is at 40g/s;
The addition W=Shf of WC particle
vρ
In the formula: W is the weight g of WC particle;
S is the surface area mm of tup end face (working face or the scope of attack)
2
H is the thickness 6～20mm of composite bed;
f
vVolume fraction 18%～52% for WC particle in the composite bed;
ρ is the density g/mm of WC particle
3
Rotating speed with the vertical centrifugal casting machine after cast finishes is increased to 750 rev/mins, rotates 5 minutes, shuts down cooling and gets final product.
Embodiment 5: the moulding of at first adopting resin sand to carry out tup is the manufacturing of tup mould, then the tup mould is installed on the rotating disk of vertical centrifugal casting machine, adopt 250kg medium-frequency induction furnace molten alloy steel to form molten metal, the tapping temperature of molten metal is 1680 ℃, and pouring temperature is 1460 ℃; Before molten metal is come out of the stove, start the vertical centrifugal casting machine, the rotating speed of vertical centrifugal casting machine is controlled at 120 rev/mins, the molten metal cast of coming out of the stove then, and poring rate is 5kg/s, is 2500～3000Hv with hardness in casting of molten metal, density is 15.8～16.5g/mm
3, granularity is that the WC particle of 300 μ m～750 μ m joins in the molten metal with stream, the flow-control of WC particle is at 100g/s;
The addition W=Shf of WC particle
vρ
In the formula: W is the weight g of WC particle;
S is the surface area mm of tup end face (working face or the scope of attack)
2
H is the thickness 6～20mm of composite bed;
f
vVolume fraction 18%～52% for WC particle in the composite bed;
ρ is the density g/mm of WC particle
3
Rotating speed with the vertical centrifugal casting machine after cast finishes is increased to 900 rev/mins, rotates 3 minutes, shuts down cooling and gets final product.
Hammer body according to the composite material hammer head that preparation method of the present invention obtained is potassium steel, steel alloy or ordinary carbon steel, the hammer tip of tup is that the working face or the scope of attack are the WC particle reinforced composite, composite layer hardness is HRC55～67, thickness is 6-20mm, has excellent impact wear resistance; WC particle is excellent metallurgical with the interface of matrix and combines in the interface of composite layer and metal carrier body and the composite layer, the bond strength height, and WC particle is evenly distributed, and the grain volume fraction adjustable extent is 18%～52%; The hammer head of hammer crusher that the present invention produces, its life-span is 5～10 times of traditional potassium steel tup; The PLJ formula disintegrating machine jet liner plate of producing (a kind of form of tup), its life-span is 3～6 times of Cr20 rich chromium cast iron.
Claims (4)
1, a kind of casting method of composite material hammer head is characterized in that:
1) at first the tup mould is installed on the rotating disk of vertical centrifugal casting machine, adopts electro-smelting metal carrier body material to form molten metal, the tapping temperature of molten metal is 1500 ℃～1680 ℃, and pouring temperature is 1380 ℃～1500 ℃;
2) before molten metal is come out of the stove, start the vertical centrifugal casting machine, the rotating speed of vertical centrifugal casting machine is controlled at 50～200 rev/mins, the molten metal cast of coming out of the stove then, poring rate is 5～28kg/s, the WC particle that with granularity is 300 μ m～750 μ m in casting of molten metal joins in the molten metal with stream, and the flow-control of WC particle is at 20～100g/s;
The addition of WC particle is calculated according to following formula:
W＝
S·
h·f
v·
ρ
In the formula:
WBe the weight of WC particle, g;
SFor the tup end face is the surface area of the working face or the scope of attack, mm
2
hBe the thickness of composite bed, 6～20mm;
f
vBe the volume fraction of WC particle in the composite bed, 18%～52%;
ρBe the density of WC particle, g/mm
3
Rotating speed with the vertical centrifugal casting machine after cast finishes is increased to 500～900r/min, rotates 3～10min, shuts down cooling and gets final product.
2, the casting method of composite material hammer head according to claim 1 is characterized in that: said metal carrier body material is potassium steel, steel alloy or ordinary carbon steel.
3, the casting method of composite material hammer head according to claim 1 is characterized in that: the hardness of said WC particle is 2500～3000Hv, and density is 15.8～16.5g/mm
3
4, a kind of composite material hammer head of casting according to the casting method of the described composite material hammer head of claim 1, it is characterized in that: the hammer body of tup is potassium steel, steel alloy or ordinary carbon steel, the hammer tip of tup is that the working face or the scope of attack are the WC particle reinforced composite, composite layer hardness is HRC55～67, and thickness is 6-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100961480A CN1307016C (en) | 2005-10-13 | 2005-10-13 | Composite material tup and its casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100961480A CN1307016C (en) | 2005-10-13 | 2005-10-13 | Composite material tup and its casting method |
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| CN1748910A CN1748910A (en) | 2006-03-22 |
| CN1307016C true CN1307016C (en) | 2007-03-28 |
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| CNB2005100961480A Expired - Fee Related CN1307016C (en) | 2005-10-13 | 2005-10-13 | Composite material tup and its casting method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134232B (en) * | 2006-08-28 | 2011-01-19 | 赤峰市恒泰特种钢铸造有限责任公司 | Technique for producing anticentripetal composite abrasion-proof hammer tools |
| CN101338708B (en) * | 2008-08-27 | 2010-06-02 | 重庆大学 | Local granule reinforced piston and its manufacture method |
| CN101530905B (en) * | 2009-04-03 | 2011-02-09 | 西安交通大学 | Composite material hammer head of crusher and method for casting same |
| CN103736955B (en) * | 2013-12-19 | 2016-06-29 | 宁国市东渡铸业有限公司 | A kind of die spinning composite hammer head device |
| CN113523243B (en) * | 2021-07-09 | 2022-05-27 | 邯郸慧桥复合材料科技有限公司 | Solid-liquid composite casting method for bent plate-shaped bimetal wear-resistant part |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291972Y (en) * | 1997-01-23 | 1998-09-23 | 西安建筑科技大学 | Double-metal combined beater head |
| AU5654300A (en) * | 1999-09-17 | 2001-03-22 | Magazine Hill Pty Ltd | Method of manufacturing a wear component and wear components manufactured by that method |
| CN1676652A (en) * | 2005-04-01 | 2005-10-05 | 攀枝花市白云铸造有限责任公司 | Wear-resistant hammer head and its manufacturing process |
-
2005
- 2005-10-13 CN CNB2005100961480A patent/CN1307016C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291972Y (en) * | 1997-01-23 | 1998-09-23 | 西安建筑科技大学 | Double-metal combined beater head |
| AU5654300A (en) * | 1999-09-17 | 2001-03-22 | Magazine Hill Pty Ltd | Method of manufacturing a wear component and wear components manufactured by that method |
| CN1676652A (en) * | 2005-04-01 | 2005-10-05 | 攀枝花市白云铸造有限责任公司 | Wear-resistant hammer head and its manufacturing process |
Non-Patent Citations (4)
| Title |
|---|
| 超高锰钢锤头的生产 沈卫东等，机械工人(热加工) 第2期 2004 * |
| 超高锰钢锤头的生产 沈卫东等，机械工人(热加工) 第2期 2004;锤头的双金属复合铸造工艺 程红晓等，中国铸造装备与技术 第2期 2004;高钒高速钢/碳钢双金属复合锤头铸造工艺的改进 邵抗振等，铸造 第154卷 第8期 2005 * |
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| 高钒高速钢/碳钢双金属复合锤头铸造工艺的改进 邵抗振等，铸造 第154卷 第8期 2005 * |
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