CN108588553A - A kind of gear casting production process - Google Patents
A kind of gear casting production process Download PDFInfo
- Publication number
- CN108588553A CN108588553A CN201810261806.4A CN201810261806A CN108588553A CN 108588553 A CN108588553 A CN 108588553A CN 201810261806 A CN201810261806 A CN 201810261806A CN 108588553 A CN108588553 A CN 108588553A
- Authority
- CN
- China
- Prior art keywords
- gear
- parts
- temperature
- finished product
- inovulant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Abstract
A kind of gear casting production process, it is characterised in that：Include the following steps：(1) composition of raw materials：Include the component of following masses percentage：0.04 0.06 parts of 90 110 parts of Fe, 0.50 1.10 parts of C, 1.60 parts of Si0.74,0.80 1.20 parts of Mn, 0.12 0.18 parts of Ni, 0.05 0.07 parts of S and P；(2) composition of raw materials in step (1) is stirred according to the ratio, is uniformly mixed, put into smelting furnace, it is 400 500 DEG C to make each raw material high-temperature fusion, melting temperature；Melting time is 3 6h, primary every 30 45min stirrings, stirs 1 3min every time, inovulant is added after stirring, stand 40 60min.The invention has the advantages that：Tensile strength is up to 480Mpa or more, and shear strength is up to 300Mpa or more, and elongation percentage is more than 8, and wear-resisting property, case hardness is 2000~2500HV, and wearability is good.Process time is short, high in machining efficiency, and production cost is low.
Description
Technical field
The present invention relates to Mechanical processing of casting technical fields, and in particular to a kind of gear casting production process.
Background technology
Gear industry has been obtained for developing rapidly in China.Gear is mutually engageable machine components with teeth, tooth
Take turns application in transmission very early there have been.In machine building industry, the material used in gear is manufactured by many kinds, is had
Steel, iron, copper alloy and nonmetallic materials etc., it is generally maximum with steel gear application, but steel gear is manufactured by being machined
, wear-resisting property is poor, the gear of other materials, due to respectively there is some different and defects, is only applicable to some spies
In the occasion very needed.Currently, the process that traditional mechanical processing makes gear include blanking, forge, be rough turn, normalizing, smart car,
Gear hobbing, gear shaping, chamfering, chamfered edge and grinding out etc., traditional Gear Production process is more, technique is more complex, and the production cycle is long, production effect
Rate is low, and production cost is also relatively high.Gear in the prior art is made of aluminum alloy materials mostly, wearability, tension anterior divisions
East, shear strength and extension property are to be improved.The technique of manufacture gear is mostly now：Stirring-forming-sintering-packet
Dress.In such technique, many companies are in order to reduce cost, using simplifying formula or reduce the modes such as technique, though simplify formula
Cost so is saved, properties of product quality can be lacked and be ensured, the product that can only be directed to some least significant ends uses.
Invention content
Technical problem to be solved by the invention is to provide one kind simply, is easily achieved, and production efficiency is high, has wearability
Good, tensile strength height, good extending performance, the high advantage of shear strength gear casting production process.
In order to solve the above technical problems, technical solution provided by the invention is：A kind of gear casting production process, feature
It is：Include the following steps：
(1) composition of raw materials：Include the component of following masses percentage：Fe90-110 parts, C0.50-1.10 parts, Si0.74-
1.60 parts, Mn0.80-1.20 parts, Ni0.12-0.18 parts, S0.05-0.07 parts and P0.04-0.06 parts；
(2) composition of raw materials in step (1) is stirred according to the ratio, is uniformly mixed, put into smelting furnace, make each raw material high temperature melting
Melt, melting temperature is 400-500 DEG C；Melting time is 3-6h, primary every 30-45min stirrings, stirs 1-3min every time, stirs
Inovulant is added after mixing, stands 40-60min；
(3) strand：Strand process uses conticaster, and the pulling rate of the conticaster is 0.6-0.72m/min, and the strand is adopted
Electric current with M-EMS, the electromagnetic agitation is 400A, frequency 2.5Hz；
(4) it is sintered：Product raw embryo is placed on carbon plate, 3.5-4h is sintered in sintering furnace, is sintered -670 DEG C of furnace temperature -
1140 DEG C, sinter product raw embryo into semi-finished product；
(5) design molding is required according to drawing of rough casting paper size, mold includes upper mold and lower mold, by upper mold and lower die
Tool is assembled into core shooter, is pressed molding sand in full model by core shooter, molding sand is heating and curing under the conditions of temperature is 130-140 DEG C
It is spare after molding；
(6)) inovulant is added under the conditions of temperature is 1420-1560 DEG C in molten liquid made from step (2), stands 40-
60min, then cast into the moulding in step (5), after the completion of casting, water cooling to 430-470 DEG C, obtain gear half at；
(7) by gear semi-finished product through normalizing, tempering and annealing heat-treats；
Polishing：Burr, burr are removed to gear with deburring, burr machine, Boring machine is used in combination to carry out bore hole to gear
Processing, obtains gear finished product.
Preferably, the inovulant is silicon strontium inovulant, and the addition of the inovulant is the 2-4% of mother liquor weight.
Preferably, the normalizing is gear semi-finished product to be kept the temperature 30-40min under the conditions of temperature is 640-660 DEG C, then rise
Temperature keeps the temperature 40-60min to 780-810 DEG C；Tempering is that gear semi-finished product are cooled to 430-470 DEG C, keeps the temperature 40-50min, then
It rises again to 540-560 DEG C, keeps the temperature 40-60min；Annealing is that gear semi-finished product are cooled to 490-530 DEG C, keeps 1-2h.
The present invention has the following advantages：Gear surface hardness level be positively retained at 60HRC or more, inner hardness grade is protected
It holds in 40HRC or more, case-hardening layer thickness is 1.5-1.7mm.The above product gear parameter makes gear in use
Cementation zone is not easily disconnected from, gear impact resistance, wearability and intensity are suitable, and the service life of gear is same use now
There is 10-20 times of the gear that heat treatment process obtains；Gear made from production technology, tensile strength are up to through the invention
480Mpa or more, shear strength are up to 300Mpa or more, and elongation percentage is more than 8, wear-resisting property, and case hardness is 2000~
2500HV, wearability are good.Process time is short, high in machining efficiency, and production cost is low.
Specific implementation mode
A kind of gear casting production process, it is characterised in that：Include the following steps：
(1) composition of raw materials：Include the component of following masses percentage：90-110 parts of Fe, 0.50-1.10 parts of C,
0.04-0.06 parts of Si0.74-1.60 parts, 0.80-1.20 parts of Mn, 0.12-0.18 parts of Ni, 0.05-0.07 parts of S and P；
(2) composition of raw materials in step (1) is stirred according to the ratio, is uniformly mixed, put into smelting furnace, make each raw material high temperature melting
Melt, melting temperature is 400-500 DEG C；Melting time is 3-6h, primary every 30-45min stirrings, stirs 1-3min every time, stirs
Inovulant is added after mixing, stands 40-60min；
(3) strand：Strand process uses conticaster, and the pulling rate of the conticaster is 0.6-0.72m/min, and the strand is adopted
Electric current with M-EMS, the electromagnetic agitation is 400A, frequency 2.5Hz；
(4) it is sintered：Product raw embryo is placed on carbon plate, 3.5-4h is sintered in sintering furnace, is sintered -670 DEG C of furnace temperature -
1140 DEG C, sinter product raw embryo into semi-finished product；
(5) design molding is required according to drawing of rough casting paper size, mold includes upper mold and lower mold, by upper mold and lower die
Tool is assembled into core shooter, is pressed molding sand in full model by core shooter, molding sand is heating and curing under the conditions of temperature is 130-140 DEG C
It is spare after molding；
(6)) inovulant is added under the conditions of temperature is 1420-1560 DEG C in molten liquid made from step (2), stands 40-
60min, then cast into the moulding in step (5), after the completion of casting, water cooling to 430-470 DEG C, obtain gear half at；
(7) by gear semi-finished product through normalizing, tempering and annealing heat-treats；
Polishing：Burr, burr are removed to gear with deburring, burr machine, Boring machine is used in combination to carry out bore hole to gear
Processing, obtains gear finished product.
The inovulant is silicon strontium inovulant, and the addition of the inovulant is the 2-4% of mother liquor weight.
The normalizing is gear semi-finished product to be kept the temperature 30-40min under the conditions of temperature is 640-660 DEG C, then be warming up to
780-810 DEG C, keep the temperature 40-60min；Tempering is that gear semi-finished product are cooled to 430-470 DEG C, keeps the temperature 40-50min, then rise again
To 540-560 DEG C, 40-60min is kept the temperature；Annealing is that gear semi-finished product are cooled to 490-530 DEG C, keeps 1-2h.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features.All essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (3)
1. a kind of gear casting production process, it is characterised in that：Include the following steps：
(1) composition of raw materials：Include the component of following masses percentage：90-110 parts of Fe, 0.50-1.10 parts of C, Si0.74-
0.04-0.06 parts of 1.60 parts, 0.80-1.20 parts of Mn, 0.12-0.18 parts of Ni, 0.05-0.07 parts of S and P；
(2) composition of raw materials in step (1) is stirred according to the ratio, is uniformly mixed, put into smelting furnace, make each raw material high-temperature fusion,
Melting temperature is 400-500 DEG C；Melting time is 3-6h, primary every 30-45min stirrings, 1-3min is stirred every time, after stirring
Inovulant is added, stands 40-60min；
(3) strand：Strand process uses conticaster, and the pulling rate of the conticaster is 0.6-0.72m/min, and the strand is using knot
The electric current of brilliant device electromagnetic agitation, the electromagnetic agitation is 400A, frequency 2.5Hz；
(4) it is sintered：Product raw embryo is placed on carbon plate, 3.5-4h, -670 DEG C -1140 of sintering furnace temperature are sintered in sintering furnace
DEG C, sinter product raw embryo into semi-finished product；
(5) design molding is required according to drawing of rough casting paper size, mold includes upper mold and lower mold, by upper mold and lower set of molds
It is attached to core shooter, is pressed molding sand in full model by core shooter, molding sand is heating and curing molding under the conditions of temperature is 130-140 DEG C
Afterwards, spare；
(6)) inovulant is added under the conditions of temperature is 1420-1560 DEG C in molten liquid made from step (2), stands 40-
60min, then cast into the moulding in step (5), after the completion of casting, water cooling to 430-470 DEG C, obtain gear half at；
(7) by gear semi-finished product through normalizing, tempering and annealing heat-treats；
(8) it polishes：Burr, burr are removed to gear with deburring, burr machine, is used in combination Boring machine to carry out bore hole to gear and adds
Work obtains gear finished product.
2. a kind of gear casting production process according to claim 1, it is characterised in that：The inovulant is that silicon strontium is bred
Agent, the addition of the inovulant are the 2-4% of mother liquor weight.
3. a kind of gear casting production process according to claim 1, it is characterised in that：The normalizing be by gear half at
Product keep the temperature 30-40min under the conditions of temperature is 640-660 DEG C, then are warming up to 780-810 DEG C, keep the temperature 40-60min；Tempering be by
Gear semi-finished product are cooled to 430-470 DEG C, keep the temperature 40-50min, then rise again to 540-560 DEG C, keep the temperature 40-60min；Annealing is
Gear semi-finished product are cooled to 490-530 DEG C, keep 1-2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810261806.4A CN108588553A (en) | 2018-03-28 | 2018-03-28 | A kind of gear casting production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810261806.4A CN108588553A (en) | 2018-03-28 | 2018-03-28 | A kind of gear casting production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108588553A true CN108588553A (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810261806.4A Pending CN108588553A (en) | 2018-03-28 | 2018-03-28 | A kind of gear casting production process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070650A (en) * | 2021-03-18 | 2021-07-06 | 重庆市永和直锥齿有限公司 | Zero-degree arc tooth production process and gear manufacturing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089846A (en) * | 2001-09-17 | 2003-03-28 | Nkk Corp | High carbon steel sheet for working having reduced plane anisotropy, and production method therefor |
| CN104439993A (en) * | 2014-11-24 | 2015-03-25 | 青岛海日升精密机械有限公司 | Gear casting production process |
| CN107287521A (en) * | 2017-06-28 | 2017-10-24 | 安徽华飞机械铸锻有限公司 | A kind of gear casting production process |
-
2018
- 2018-03-28 CN CN201810261806.4A patent/CN108588553A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089846A (en) * | 2001-09-17 | 2003-03-28 | Nkk Corp | High carbon steel sheet for working having reduced plane anisotropy, and production method therefor |
| CN104439993A (en) * | 2014-11-24 | 2015-03-25 | 青岛海日升精密机械有限公司 | Gear casting production process |
| CN107287521A (en) * | 2017-06-28 | 2017-10-24 | 安徽华飞机械铸锻有限公司 | A kind of gear casting production process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070650A (en) * | 2021-03-18 | 2021-07-06 | 重庆市永和直锥齿有限公司 | Zero-degree arc tooth production process and gear manufacturing device |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180928 |
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| RJ01 | Rejection of invention patent application after publication |