CN101899610B - Wet pan gear and manufacturing method thereof - Google Patents
Wet pan gear and manufacturing method thereof Download PDFInfo
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- CN101899610B CN101899610B CN2010102680266A CN201010268026A CN101899610B CN 101899610 B CN101899610 B CN 101899610B CN 2010102680266 A CN2010102680266 A CN 2010102680266A CN 201010268026 A CN201010268026 A CN 201010268026A CN 101899610 B CN101899610 B CN 101899610B
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- Prior art keywords
- gear
- wet pan
- blank
- manufacture
- wet
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 238000003723 Smelting Methods 0.000 claims abstract description 16
- 238000005496 tempering Methods 0.000 claims abstract description 14
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 9
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 9
- 230000003746 surface roughness Effects 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 20
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims description 13
- 238000007669 thermal treatment Methods 0.000 claims description 13
- 229910052804 chromium Inorganic materials 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 206010039509 Scab Diseases 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 235000013312 flour Nutrition 0.000 claims description 2
- 229910052845 zircon Inorganic materials 0.000 claims description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 11
- 229910001141 Ductile iron Inorganic materials 0.000 abstract description 2
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 239000010949 copper Substances 0.000 description 11
- 239000011572 manganese Substances 0.000 description 11
- 238000000641 cold extrusion Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007514 turning Methods 0.000 description 3
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
- Gears, Cams (AREA)
Abstract
The invention relates to a long-life wet pan gear and a manufacturing method thereof. The wet pan gear is chemically made from 3.4-3.8% of C, 2.2-2.6% of Si, 0.6-0.9% of Mn, not more than 0.06% of P, not more than 0.03% of S, 0.4-0.7% of Cu, 0.05-0.2% of Mo, 0.4-0.6% of Cr and the balance of Fe. The manufacturing method comprises the following steps of: making a mold, smelting, casting, smelting into an alloy liquid at 1480-1500 DEG C, adding rare earth ferrosilicon magnesium alloy nodulizer, uniformly mixing, and pouring into the mold to cast a gear blank; thermally treating the blank at 900-920 DEG C for 2-4 h, heating the tooth part of the blank to 280-310 DEG C, and tempering for 2-3 h; and processing by a lathe so that the surface roughness Ra of the gear reaches 6.3-12.5. The strength and the wear resistance of the product are increased by 2-3 times higher than those of common spheroidal graphite cast iron, the tensile strength is 780-810 MPa, the yield strength is 580-610 MPa, the hardness HRC of the tooth part reaches 40-48, and the average service life of the product is long.
Description
Technical field
The present invention relates to the Gear Processing field, particularly a kind of high life wet pan gear and method of manufacture thereof.
Background technology
The complete processing of gear is divided into technological processs such as material base moulding, thermal treatment, turning, gear hobbing, shaving or roll flute.Along with Development in Machine Industry, high requirement has been proposed all for intensity, wear resistance and the hardness of gear.In the course of processing, gear material and complete processing have considerable influence to the performance of gear.Mostly gear material is the QT500 magnesium iron at present, is merely the mean life of a gear about 15 days, and the hardness and the impelling strength of gear are lower, and the life-span is shorter, can not satisfy the needs of industrial application.
Application number is the working method that the patent of CN200610026704.1 provides a kind of flange-axis external cylindrical gear of automobile; Comprise following operation: blank forging forming, thermal treatment, turning, outer cylindrical gear wheel shaping, roll flute, the outer cylinder gear molding procedure adopts cold-extrusion molding method.The turning reasonable size precision of the gear blank section before the cold extrusion gear forming operation is a GB1800-78 IT8 level, and surfaceness is Ra 1.25～Ra2; The tooth surface roughness of cold extrusion shaped gear is Ra10～Ra16.This invention does not relate to the material composition problem, awaits work-ing life improving, and this gear is not suitable for wet rolling machine yet.
Summary of the invention
The technical problem that the present invention will solve: a kind of long lifetime wet pan gear with higher-strength, better plasticity and wear resistance is provided, the method for manufacture of this wet pan gear also is provided.
Technical scheme of the present invention:
A kind of wet pan gear; Represent with weight percentage; The chemical constitution of said wet pan gear alloy is: C 3.4～3.8%, Si 2.2～2.6%, Mn 0.6～0.9%, P≤0.06%, S≤0.03%, Cu 0.4～0.7%, Mo 0.05～0.2%, Cr 0.4～0.6%, surplus is Fe.
A kind of wet pan gear; Represent with weight percentage; The chemical constitution of said wet pan gear alloy is: C 3.4～3.8%, Si 2.2～2.6%, Mn 0.6～0.9%, P 0.02～0.06%, S 0.01～0.03%, Cu 0.4～0.7%, Mo 0.05～0.2%, Cr 0.4～0.6%, surplus is Fe.
The method of manufacture of said wet pan gear may further comprise the steps:
(1) modeling adopts resin sand to make the wet pan gear mould, brushes mould inside with zircon flour coating, guarantees not scab of foundry goods tooth portion, indeformable;
(2) melting, casting are heated melting with raw material, under 1480～1500 ℃, are smelted into alloy liquid, mix behind the adding rare earth magnesium ferrosilicon alloy nodulizing agent, inject said mould and are cast as gear blank; The demoulding behind naturally cooling;
(3) thermal treatment is heat-treated blank at 900～920 ℃ of following insulation 2～4h of temperature, adds the water spray cooling then; Blank tooth portion is heated to 280～310 ℃, carries out tempering 2-3h;
(4) gear blank of machining after with thermal treatment is through machined into, and requiring the gear surface roughness is Ra6.3-12.5.
Said heating smelting temperature is 1490～1500 ℃, and smelting time is 1.5-2h.
Said heating smelting temperature is 1490～1500 ℃.
The add-on of said rare earth magnesium ferrosilicon alloy nodulizing agent is 1.2～1.6% of a weight alloy.
Blank tooth portion hardness is HRC36～40 behind the said tempering heat treatment.
Positive beneficial effect of the present invention:
(1) the present invention is starting material with the common new pig iron and foundry returns, through adding cheap manganese and an amount of copper, reduces the add-on of expensive molybdenum, thereby effectively reduces raw materials cost.
(2) product strength of the present invention, wear resistance have improved 2～3 times than common magnesium iron, its tensile strength (σ
b) be 780-810MPa, ys (σ
p) be 580-610MPa, tooth portion hardness reaches HRC40～48; The grade of the product good manufacturability of quenching, heat treatment deformation is little, and product performance are superior to like product.
(3) the present invention adopts furnace melting, is nodulizing agent with the rare earth magnesium ferrosilicon alloy, and the nodularization rate is the 1-2 level, has deoxidation preferably, sweetening effectiveness, can effectively improve the physical strength of gear.
(4) the present invention is through adjusting and thermal treatment gear material, and service life of gear prolongs greatly, and its mean life is more than 2 months; And original material is the ductile iron gear of QT500, and on average be merely about 15 days its work-ing life.
Four, embodiment:
Embodiment 1: a kind of wet pan gear, its raw alloy composition is: C 3.6%, Si 2.4%, Mn 0.7%, P 0.03%, S 0.02%, Cu 0.6%, Mo 0.1%, Cr 0.5%, surplus is Fe.
The method of manufacture of this wet pan gear is:
(1) modeling adopts resin sand to make gear die, with zirconium English powder (ZrSiO
4) brush mould inside, guarantee not scab of foundry goods tooth portion, indeformable;
(2) melting, casting are heated melting with raw material with electric furnace, at 1480～1500 ℃ of following melting 1.5-2h, obtain alloy liquid; The rare earth magnesium ferrosilicon alloy nodulizing agent that adds weight alloy 1.2～1.6%; Stir then, alloy liquid is injected above-mentioned mould, be cast as gear blank; The demoulding behind naturally cooling, and remove resin sand; Wherein the staple of rare earth magnesium ferrosilicon alloy nodulizing agent is a ferrosilicon, and it is formulated to add rare-earth mineral, MAGNESIUM METAL 99, calcium again.
(3) thermal treatment is heated to 900～920 ℃ with gear blank, under this temperature, is incubated 2～4h, adds the water spray cooling then; Blank tooth portion is heated to 280～310 ℃, and tempering 2h makes tooth portion hardness reach HRC40～48;
(4) gear blank of machining after with thermal treatment requires gear surface roughness Ra to reach 6.3-12.5 through machined into.
Embodiment 2: basic identical with embodiment 1, difference is:
Wet pan gear material composition: C 3.4%, Si 2.2%, Mn 0.6%, P 0.06%, S 0.03%, Cu 0.7%, Mo 0.1%, Cr 0.5%, surplus is Fe.
Method of manufacture: 1500 ℃ of smelting temperatures, smelting time 1.5h; 900 ℃ of thermal treatment temps, insulation 4h; 285 ℃ of tempering temperatures, tempering time 2h; Machining gear surface roughness Ra is 7-10.
Embodiment 3: basic identical with embodiment 1, difference is:
Wet pan gear material composition: C 3.8%, Si 2.6%, Mn 0.9%, P 0.05%, S 0.02%, Cu 0.4%, Mo 0.2%, Cr 0.6%, surplus is Fe.
Method of manufacture: 1480 ℃ of smelting temperatures, smelting time 2h; 920 ℃ of thermal treatment temps are incubated 2 hours; 290 ℃ of tempering temperatures, tempering time 2 hours; Machining gear surface roughness Ra is 8-12.
Embodiment 4: basic identical with embodiment 1, difference is:
The wet pan gear material composition is: C 3.6%, Si 2.4%, Mn 0.7%, P 0.04%, S 0.01%, Cu 0.5%, Mo 0.15%, Cr 0.5%, surplus is Fe.
Method of manufacture: 1490 ℃ of smelting temperatures, smelting time 1.8h; 910 ℃ of thermal treatment temps are incubated 3 hours; 300 ℃ of tempering temperatures, tempering time 2 hours; Machining gear surface roughness Ra is 6.3-9.
Embodiment 5: basic identical with embodiment 1, difference is:
Wet pan gear material composition: C 3.7%, Si 2.5%, Mn 0.8%, P 0.06%, S 0.02%, Cu 0.6%, Mo 0.1%, Cr 0.4%, surplus is Fe.
Method of manufacture: 1500 ℃ of smelting temperatures, smelting time 1.6h; 920 ℃ of thermal treatment temps are incubated 3 hours; 280 ℃ of tempering temperatures, tempering time 2 hours; Machining gear surface roughness Ra is 6.3-12.5.
Embodiment 6: basic identical with embodiment 1, difference is:
Wet pan gear material composition: C 3.5%, Si 2.4%, Mn 0.6%, P 0.01%, S 0.02%, Cu 0.7%, Mo 0.15%, Cr 0.4%, surplus is Fe.
Embodiment 7: basic identical with embodiment 1, difference is:
Wet pan gear material composition: C 3.7%, Si 2.6%, Mn 0.6%, P 0.03%, Cu 0.6%, Mo 0.08%, Cr 0.5%, surplus is Fe.
Embodiment 8: basic identical with embodiment 1, difference is:
Wet pan gear material composition: C 3.8%, Si 2.4%, Mn 0.7%, S 0.01%, Cu 0.5%, Mo 0.15%, Cr 0.5%, surplus is Fe.
Claims (6)
1. the method for manufacture of a wet pan gear, it is characterized in that: this method may further comprise the steps:
(1) modeling adopts resin sand to make the wet pan gear mould, brushes mould inside with zircon flour coating, guarantees not scab of foundry goods tooth portion, indeformable;
(2) melting, casting are heated melting with raw material, under 1480～1500 ℃, are smelted into alloy liquid, mix behind the adding rare earth magnesium ferrosilicon alloy nodulizing agent, inject said mould and are cast as gear blank; The demoulding behind naturally cooling;
Said raw material is represented with weight percentage; Its chemical constitution is: C 3.4～3.8%, Si 2.2～2.6%, Mn 0.6～0.9%, P≤0.06%, S≤0.03%, Cu 0.4～0.7%, Mo 0.05～0.2%, Cr 0.4～0.6%, and surplus is Fe;
(3) thermal treatment is heat-treated blank at 900～920 ℃ of following insulation 2～4h of temperature, adds the water spray cooling then; Blank tooth portion is heated to 280～310 ℃, carries out tempering 2-3h;
(4) gear blank of machining after with thermal treatment is through machined into, and requiring the gear surface roughness is 6.3-12.5 μ m.
2. according to the method for manufacture of the said wet pan gear of claim 1, it is characterized in that: said heating smelting temperature is 1490～1500 ℃, and smelting time is 1.5-2h.
3. according to the method for manufacture of the said wet pan gear of claim 1, it is characterized in that: said heating smelting temperature is 1490～1500 ℃.
4. according to the method for manufacture of claim 2 or 3 said wet pan gears, it is characterized in that: the add-on of said rare earth magnesium ferrosilicon alloy nodulizing agent is 1.2～1.6% of a weight alloy.
5. according to the method for manufacture of claim 2 or 3 said wet pan gears, it is characterized in that: blank tooth portion hardness is HRC36～40 behind the said tempering heat treatment.
6. according to the method for manufacture of the said wet pan gear of claim 1; It is characterized in that: the chemical constitution of said raw material is: C 3.4～3.8%, Si 2.2～2.6%, Mn 0.6～0.9%, P 0.02～0.06%, S 0.01～0.03%, Cu 0.4～0.7%, Mo 0.05～0.2%, Cr 0.4～0.6%, surplus is Fe.
?
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102680266A CN101899610B (en) | 2010-08-31 | 2010-08-31 | Wet pan gear and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102680266A CN101899610B (en) | 2010-08-31 | 2010-08-31 | Wet pan gear and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101899610A CN101899610A (en) | 2010-12-01 |
| CN101899610B true CN101899610B (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102680266A Expired - Fee Related CN101899610B (en) | 2010-08-31 | 2010-08-31 | Wet pan gear and manufacturing method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056628B (en) * | 2012-10-27 | 2016-09-28 | 富莱茵汽车部件有限公司 | A kind of crankshaft timing gear preparation method |
| CN102950441B (en) * | 2012-10-27 | 2016-10-19 | 富莱茵汽车部件有限公司 | A kind of electromotor timing gears preparation method |
| CN103602882B (en) * | 2013-11-13 | 2015-08-05 | 中国石油集团济柴动力总厂成都压缩机厂 | The pouring molten iron of natural aerodynamic cylinder and melting technology thereof |
| CN105179230B (en) * | 2015-11-03 | 2018-12-07 | 芜湖环球汽车配件有限公司 | A kind of external gear rotary pump |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1022810C (en) * | 1992-02-03 | 1993-11-24 | 大连机车车辆工厂配件分厂 | Centrifugal casting method and equipment for alloy cast iron cylinder jacke |
| CN1034230C (en) * | 1992-12-30 | 1997-03-12 | 华东工学院 | Low-alloy spheroidal graphite cast-iron and process for heat-treatment of casting thereof |
| CN1102179C (en) * | 1999-08-17 | 2003-02-26 | 浙江春晖集团公司 | Alloyed cast iron for cam axle |
| JP2002129276A (en) * | 2000-10-31 | 2002-05-09 | Yanmar Diesel Engine Co Ltd | Cast iron material having excellent machinability and thermal fatigue resistance |
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Address after: 453100 No. 76 worker peasant Road, Xinxiang, Henan, Weihui Patentee after: HENAN RONGJIN HIGH TEMPERATRUE MATERIALS Co.,Ltd. Address before: 453100 No. 76 worker peasant Road, Xinxiang, Henan, Weihui Patentee before: Weihui Rongjin High Temperature Material Co.,Ltd. |
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Granted publication date: 20120328 |