CN101899610A - Wet pan gear and manufacturing method thereof - Google Patents
Wet pan gear and manufacturing method thereof Download PDFInfo
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- CN101899610A CN101899610A CN 201010268026 CN201010268026A CN101899610A CN 101899610 A CN101899610 A CN 101899610A CN 201010268026 CN201010268026 CN 201010268026 CN 201010268026 A CN201010268026 A CN 201010268026A CN 101899610 A CN101899610 A CN 101899610A
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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 manufacture method 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.Gear material mostly is the QT500 magnesium iron at present, and only be about 15 days the mean life of a gear, 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 provides a kind of working method of flange-axis external cylindrical gear of automobile for the patent of CN200610026704.1, 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 to be solved in the present invention: a kind of long lifetime wet pan gear with higher-strength, better plasticity and wear resistance is provided, the manufacture method 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 described 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 described 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 manufacture method of described 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, are smelted into alloy liquid under 1480～1500 ℃, mix behind the adding rare earth magnesium ferrosilicon alloy nodulizing agent, inject described 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.
Described heating smelting temperature is 1490～1500 ℃, and smelting time is 1.5-2h.
Described heating smelting temperature is 1490～1500 ℃.
The add-on of described 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 described 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, by 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, yield strength (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 better than 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 by 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 only be 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 manufacture method 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 main component of rare earth magnesium ferrosilicon alloy nodulizing agent is a ferrosilicon, and it is formulated to add rare-earth mineral, MAGNESIUM METAL, calcium again.
(3) thermal treatment is heated to 900～920 ℃ with gear blank, is incubated 2～4h under this temperature, 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.
Manufacture method: 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.
Manufacture method: 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.
Manufacture method: 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.
Manufacture method: 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 (7)
1. wet pan gear, it is characterized in that: represent with weight percentage, the chemical constitution of described 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.
2. wet pan gear, it is characterized in that: represent with weight percentage, the chemical constitution of described 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.
3. the manufacture method of claim 1 or 2 described wet pan gears, 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, are smelted into alloy liquid under 1480～1500 ℃, mix behind the adding rare earth magnesium ferrosilicon alloy nodulizing agent, inject described 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 gear surface roughness Ra is 6.3-12.5.
4. according to the manufacture method of the described wet pan gear of claim 3, it is characterized in that: described heating smelting temperature is 1490～1500 ℃, and smelting time is 1.5-2h.
5. according to the manufacture method of the described wet pan gear of claim 3, it is characterized in that: described heating smelting temperature is 1490～1500 ℃.
6. according to the manufacture method of claim 4 or 5 described wet pan gears, it is characterized in that: the add-on of described rare earth magnesium ferrosilicon alloy nodulizing agent is 1.2～1.6% of a weight alloy.
7. according to the manufacture method of claim 4 or 5 described wet pan gears, it is characterized in that: blank tooth portion hardness is HRC36～40 behind the described tempering heat treatment.
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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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102680266A CN101899610B (en) | 2010-08-31 | 2010-08-31 | Wet pan gear and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN101899610A true CN101899610A (en) | 2010-12-01 |
| CN101899610B CN101899610B (en) | 2012-03-28 |
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| CN2010102680266A Active CN101899610B (en) | 2010-08-31 | 2010-08-31 | Wet pan gear and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950441A (en) * | 2012-10-27 | 2013-03-06 | 富莱茵汽车部件有限公司 | Production method for timing gear for engines |
| CN103056628A (en) * | 2012-10-27 | 2013-04-24 | 富莱茵汽车部件有限公司 | Crankshaft timing gear manufacturing method |
| CN103602882A (en) * | 2013-11-13 | 2014-02-26 | 中国石油集团济柴动力总厂成都压缩机厂 | Pouring molten iron and smelting process of natural gas powered cylinder |
| CN105179230A (en) * | 2015-11-03 | 2015-12-23 | 芜湖环球汽车配件有限公司 | External meshed gear pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064425A (en) * | 1992-02-03 | 1992-09-16 | 大连机车车辆工厂配件分厂 | Alloy cast iron cylinder jacke centre spinning method and equipment |
| 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 |
| CN1243886A (en) * | 1999-08-17 | 2000-02-09 | 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 |
-
2010
- 2010-08-31 CN CN2010102680266A patent/CN101899610B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064425A (en) * | 1992-02-03 | 1992-09-16 | 大连机车车辆工厂配件分厂 | Alloy cast iron cylinder jacke centre spinning method and equipment |
| 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 |
| CN1243886A (en) * | 1999-08-17 | 2000-02-09 | 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950441A (en) * | 2012-10-27 | 2013-03-06 | 富莱茵汽车部件有限公司 | Production method for timing gear for engines |
| CN103056628A (en) * | 2012-10-27 | 2013-04-24 | 富莱茵汽车部件有限公司 | Crankshaft timing gear manufacturing method |
| 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 |
| CN103602882A (en) * | 2013-11-13 | 2014-02-26 | 中国石油集团济柴动力总厂成都压缩机厂 | Pouring molten iron and smelting process of natural gas powered cylinder |
| CN105179230A (en) * | 2015-11-03 | 2015-12-23 | 芜湖环球汽车配件有限公司 | External meshed gear pump |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101899610B (en) | 2012-03-28 |
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Owner name: HENAN RONGJIN HIGH TEMPERATURE MATERIAL CO., LTD. Free format text: FORMER NAME: WEIHUI RONGJIN REFRACTORY CO., LTD. |
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Address after: 453100 No. 76 worker peasant Road, Xinxiang, Henan, Weihui Patentee after: WEIHUI RONGJIN HIGH TEMPERATURE MATERIAL CO., LTD. Address before: 453100 No. 76 worker peasant Road, Xinxiang, Henan, Weihui Patentee before: Weihui Rongjin Refractory Co., Ltd. |