CN102747286A - Hypoid gear for sintering copper-steel based on powder metallurgy technology and manufacturing method thereof - Google Patents

Hypoid gear for sintering copper-steel based on powder metallurgy technology and manufacturing method thereof Download PDF

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Publication number
CN102747286A
CN102747286A CN2012102073991A CN201210207399A CN102747286A CN 102747286 A CN102747286 A CN 102747286A CN 2012102073991 A CN2012102073991 A CN 2012102073991A CN 201210207399 A CN201210207399 A CN 201210207399A CN 102747286 A CN102747286 A CN 102747286A
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China
Prior art keywords
powder
parts
sintering
steel
copper
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Pending
Application number
CN2012102073991A
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Chinese (zh)
Inventor
许道生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUBEI HEFENG CLUTCHES CO Ltd
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HUBEI HEFENG CLUTCHES CO Ltd
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Publication date
Application filed by HUBEI HEFENG CLUTCHES CO Ltd filed Critical HUBEI HEFENG CLUTCHES CO Ltd
Priority to CN2012102073991A priority Critical patent/CN102747286A/en
Publication of CN102747286A publication Critical patent/CN102747286A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a hypoid gear for sintering copper-steel based on powder metallurgy technology and a manufacturing method thereof; electrolytic iron powder is used as a substrate, and the other components comprise, by weight: 20-30 parts of atomized iron powder, 2.2-2.8 parts of copper powder, 6-8 parts of martensite valve steel powder, 1.2-1.5 parts of manganese sulfide powder, 0.3-0.5 parts of molybdenum powder, 0.2-0.6 parts of molybdenum disulfide, 1.2-1.5 parts of chromium powder, 0.8-1.2 parts of graphite, 1.2-1.6 parts of acrawax of less than 45 microns, and 1.5-1.8 parts of stearic acid of less than 45 microns. According to the invention, the copper-steel sintering technology is employed; the martensite valve steel powder is combined with alloy materials; compression molding sintering is performed; the produced forklift truck reducer hypoid gear has high tooth surface hardness of HRC=48-55, good wear resistance, high tooth uniform distribution precision, easy machinability, good impact resistance, and high bearing capability, can meet forklift truck manufacturer requirements, and is suitable for rapid mass production.

Description

A kind of hypoid gear based on PM technique sintering copper steel and preparation method thereof
Technical field
The present invention relates to powder metallurgy and make automobile component, be specifically related to a kind of hypoid gear based on PM technique sintering copper steel and preparation method thereof.
Background technology
Fork truck speed reduction unit hypoid gear in the prior art, adopt forges moulding more, and when vehicle carried, strength of gear was bigger, caused gear easy to wear, and is fragile, can not satisfy the work requirements of fork truck speed reduction unit.And processed complex, long flow path can't adapt to fork truck producer supplying need in enormous quantities.
Summary of the invention
In order to improve the quality of hypoid gear, the object of the present invention is to provide a kind of hypoid gear based on PM technique sintering copper steel and preparation method thereof.
The present invention adopts following technical scheme to achieve these goals:
A kind of hypoid gear based on PM technique sintering copper steel; It is characterized in that: be matrix with the electrolytic iron powder, the weight percentage of all the other components is: atomized iron powder 20-30, copper powder 2.2-2.8, martensite valve powdered steel 6-8, sulfuration manganese powder 1.2-1.5, molybdenum powder 0.3-0.5, molybdenumdisulphide 0.2-0.6, chromium powder 1.2-1.5, graphite 0.8-1.2, less than 45 microns Acrawax 1.2-1.6 with less than 45 microns Triple Pressed Stearic Acid 1.5-1.8.
Described hypoid gear based on PM technique sintering copper steel; It is characterized in that: be matrix with the electrolytic iron powder, the weight percentage of all the other components is: atomized iron powder 25, copper powder 2.5, martensite valve powdered steel 7, sulfuration manganese powder 1.4, molybdenum powder 0.4, molybdenumdisulphide 0.4, chromium powder 1.3, graphite 1, less than 45 microns Acrawaxs 1.4 with less than 45 microns Triple Pressed Stearic Acid 1.6.
The making method of described hypoid gear based on PM technique sintering copper steel is characterized in that may further comprise the steps:
(1) weight part by constitutive material takes by weighing each raw material, is crushed to the 300-400 order, mixes, and the mould of packing into then is placed on the press, pressure 7.5T/CM 2Condition under, compression moulding;
(2) pressed compact after the compression moulding is positioned over carries out multi-steps sintering, temperature 600-650 ℃, sintering 30-40 minute in the meshbeltfurnace successively; Temperature 800-850 ℃, sintering 60-90 minute; The temperature temperature is controlled at 1200-1250 ℃, sintering 90-120 minute; Quench treatment: 650-685 ℃ is incubated 30 minutes down then, continues to be warming up to 900-920 ℃ of insulation 2 hours; Tempering: 370-420 ℃ is incubated 1 hour down, and surface carburization is handled, precision work, gets product.
Advantage of the present invention:
The present invention adopts sintering copper steel technology, in conjunction with martensite valve powdered steel material, and alloy material, the compression moulding sintering; The fork truck speed reduction unit hypoid gear of producing, the high HRC=48-55 of tooth face hardness, wear resistance is good; High being prone to of tooth halving precision processed, and shock-resistant ability is good, and supporting capacity is higher.Can satisfy the requirement of fork truck producer, be suitable for production fast in enormous quantities.
Embodiment
Embodiment 1: based on the hypoid gear of PM technique sintering copper steel; With the electrolytic iron powder is matrix, and the weight percentage of all the other components is: atomized iron powder 25, copper powder 2.5, martensite valve powdered steel 7, sulfuration manganese powder 1.4, molybdenum powder 0.4, molybdenumdisulphide 0.4, chromium powder 1.3, graphite 1, less than 45 microns Acrawaxs 1.4 with less than 45 microns Triple Pressed Stearic Acid 1.6.Add up to absolutely.
Making step:
(1) weight part by constitutive material takes by weighing each raw material, is crushed to the 300-400 order, mixes, and the mould of packing into then is placed on the press, pressure 7.5T/CM 2Condition under, compression moulding;
(2) pressed compact after the compression moulding is positioned over carries out multi-steps sintering, temperature 600-650 ℃, sintering 30-40 minute in the meshbeltfurnace successively; Temperature 800-850 ℃, sintering 60-70 minute; The temperature temperature is controlled at 1200-1250 ℃, sintering 90-100 minute; Quench treatment: 650-665 ℃ is incubated 30 minutes down then, continues to be warming up to 900-920 ℃ of insulation 2 hours; Tempering: 370-420 ℃ is incubated 1 hour down, and surface carburization is handled, the precision work shaping, gets product.
The Performance Detection of the fork truck speed reduction unit hypoid gear that makes through the embodiment of the invention 1:
Extract ten samples and detect gear hardness: HRC 48-52; Compressive resistance >=the 5820N of tooth portion, precision can reach H7.Can satisfy the job requirement of fork truck speed reduction unit, the transmission gear halving precision that the present invention simultaneously produces is high, and good processability is easy to processing, labor and material saving, and operation is saved, and process velocity promotes greatly, is fit to produce in batches.

Claims (3)

1. hypoid gear based on PM technique sintering copper steel; It is characterized in that: be matrix with the electrolytic iron powder, the weight percentage of all the other components is: atomized iron powder 20-30, copper powder 2.2-2.8, martensite valve powdered steel 6-8, sulfuration manganese powder 1.2-1.5, molybdenum powder 0.3-0.5, molybdenumdisulphide 0.2-0.6, chromium powder 1.2-1.5, graphite 0.8-1.2, less than 45 microns Acrawax 1.2-1.6 with less than 45 microns Triple Pressed Stearic Acid 1.5-1.8.
2. the hypoid gear based on PM technique sintering copper steel according to claim 1; It is characterized in that: be matrix with the electrolytic iron powder, the weight percentage of all the other components is: atomized iron powder 25, copper powder 2.5, martensite valve powdered steel 7, sulfuration manganese powder 1.4, molybdenum powder 0.4, molybdenumdisulphide 0.4, chromium powder 1.3, graphite 1, less than 45 microns Acrawaxs 1.4 with less than 45 microns Triple Pressed Stearic Acid 1.6.
3. the making method of the hypoid gear based on PM technique sintering copper steel as claimed in claim 1 is characterized in that may further comprise the steps:
(1) weight part by constitutive material takes by weighing each raw material, is crushed to the 300-400 order, mixes, and the mould of packing into then is placed on the press, pressure 7.5T/CM 2Condition under, compression moulding;
(2) pressed compact after the compression moulding is positioned over carries out multi-steps sintering, temperature 600-650 ℃, sintering 30-40 minute in the meshbeltfurnace successively; Temperature 800-850 ℃, sintering 60-90 minute; The temperature temperature is controlled at 1200-1250 ℃, sintering 90-120 minute; Quench treatment: 650-685 ℃ is incubated 30 minutes down then, continues to be warming up to 900-920 ℃ of insulation 2 hours; Tempering: 370-420 ℃ is incubated 1 hour down, and cooling, surface carburization are handled, precision work, get product.
CN2012102073991A 2012-06-21 2012-06-21 Hypoid gear for sintering copper-steel based on powder metallurgy technology and manufacturing method thereof Pending CN102747286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012102073991A CN102747286A (en) 2012-06-21 2012-06-21 Hypoid gear for sintering copper-steel based on powder metallurgy technology and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012102073991A CN102747286A (en) 2012-06-21 2012-06-21 Hypoid gear for sintering copper-steel based on powder metallurgy technology and manufacturing method thereof

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CN102747286A true CN102747286A (en) 2012-10-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103831990A (en) * 2012-11-21 2014-06-04 中核建中核燃料元件有限公司 Device and method for adding Akko wax into UO2 powder for pellet pressing
CN106086727A (en) * 2016-07-27 2016-11-09 黄宇 A kind of high-performance powder metallurgy gear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103831990A (en) * 2012-11-21 2014-06-04 中核建中核燃料元件有限公司 Device and method for adding Akko wax into UO2 powder for pellet pressing
CN103831990B (en) * 2012-11-21 2016-01-20 中核建中核燃料元件有限公司 Acrawax is added into UO by one 2the device and method of powder compaction pellet
CN106086727A (en) * 2016-07-27 2016-11-09 黄宇 A kind of high-performance powder metallurgy gear

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Application publication date: 20121024

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