CN105734250A - Heat treatment process for 20CrMnMo gear - Google Patents

Heat treatment process for 20CrMnMo gear Download PDF

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Publication number
CN105734250A
CN105734250A CN201410744585.8A CN201410744585A CN105734250A CN 105734250 A CN105734250 A CN 105734250A CN 201410744585 A CN201410744585 A CN 201410744585A CN 105734250 A CN105734250 A CN 105734250A
Authority
CN
China
Prior art keywords
gear
heat treatment
furnace
20crmnmo
carry
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.)
Pending
Application number
CN201410744585.8A
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Chinese (zh)
Inventor
喻富春
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.)
Reach Clouds Tools Co Ltd In Chongqing
Original Assignee
Reach Clouds Tools Co Ltd In Chongqing
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Reach Clouds Tools Co Ltd In Chongqing filed Critical Reach Clouds Tools Co Ltd In Chongqing
Priority to CN201410744585.8A priority Critical patent/CN105734250A/en
Publication of CN105734250A publication Critical patent/CN105734250A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a heat treatment process for a 20CrMnMo gear. The heat treatment process is characterized by including the following steps of (1) forging, specifically, external force is exerted on a metal billet to cause plastic deformation of the metal billet; (2) rough machining; (3) normalizing, specifically, the gear is preheated in a heating furnace with the furnace temperature being increased to 900-950 DEG C, and heat is preserved for 5 hours after carbon dioxide is introduced into the furnace as protective gas; (4) tempering, specifically, the gear is preheated in the heating furnace with the furnace temperature of 550-600 DEG C and heat is preserved for 120 minutes; (5) semi-finishing; (6) gear hobbing; (7) carburizing at the temperature of 900-920 DEG C, cooling to 800 DEG C and air cooling; (8) quenching in quenching oil; and (9) cleaning.

Description

20CrMnMo gear heat treatment technique
Technical field
The present invention relates to 20CrMnMo gear heat treatment technique.
Background technology
The Technology for Heating Processing that current gear adopts is more complicated, also without unified specification, it does not have unified standard, the steel part quality causing production is uneven, a lot of operations that repeat also make under production efficiency, increase the work burden of workman, make the competitiveness of product in market not high simultaneously.For some operators just entered a profession, it does not have a clear and definite method technique, cause, when operation, mistakes and omissions often occur, in some instances it may even be possible to cause serious consequence.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of 20CrMnMo gear heat treatment technique, and this process is simple, eliminates a lot of repeatability operation, improves work efficiency.
For achieving the above object, the invention provides a kind of 20CrMnMo gear heat treatment technique, it is characterised in that comprise the steps, 1) forging: metal stock is applied external force so that it is produce plastic deformation;
2) roughing;
3) normalizing: being put into by gear and carry out the pre-heat treatment in heating furnace, furnace temperature rises to 900-950 DEG C, passes into carbon dioxide as protective gas, is incubated 5 hours;
4) tempering: put into by gear and carry out the pre-heat treatment in heating furnace, furnace temperature 550-600 DEG C, temperature retention time is 120 minutes;
5) semifinishing;
6) gear hobbing process;
7) Carburization Treatment: carry out Carburization Treatment at 900-920 DEG C, then cools to 800 DEG C and air-cooled;
8) quenching: quench in quenching oil;
9) clean.
The invention has the beneficial effects as follows: the present invention improves working (machining) efficiency, yield rate, reduce production cost, achieve the unforeseeable technique effect of those skilled in the art, overcome design set for a long time, provide a kind of new design and processing thought, and achieve more better processing effect than prior art.
Detailed description of the invention
Technical scheme provided by the invention is a kind of 20CrMnMo gear heat treatment technique, it is characterised in that comprise the steps, 1) forging: metal stock is applied external force so that it is produce plastic deformation;
2) roughing;
3) normalizing: being put into by gear and carry out the pre-heat treatment in heating furnace, furnace temperature rises to 900-950 DEG C, passes into carbon dioxide as protective gas, is incubated 5 hours;
4) tempering: put into by gear and carry out the pre-heat treatment in heating furnace, furnace temperature 550-600 DEG C, temperature retention time is 120 minutes;
5) semifinishing;
6) gear hobbing process;
7) Carburization Treatment: carry out Carburization Treatment at 900-920 DEG C, then cools to 800 DEG C and air-cooled;
8) quenching: quench in quenching oil;
9) clean.
The present invention improves working (machining) efficiency, yield rate, reduce production cost, achieve the unforeseeable technique effect of those skilled in the art, overcome design set for a long time, provide a kind of new design and processing thought, and achieve more better processing effect than prior art
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (1)

1. a 20CrMnMo gear heat treatment technique, it is characterised in that comprise the steps, 1) forging: metal stock is applied external force so that it is produce plastic deformation;
2) roughing;
3) normalizing: being put into by gear and carry out the pre-heat treatment in heating furnace, furnace temperature rises to 900-950 DEG C, passes into carbon dioxide as protective gas, is incubated 5 hours;
4) tempering: put into by gear and carry out the pre-heat treatment in heating furnace, furnace temperature 550-600 DEG C, temperature retention time is 120 minutes;
5) semifinishing;
6) gear hobbing process;
7) Carburization Treatment: carry out Carburization Treatment at 900-920 DEG C, then cools to 800 DEG C and air-cooled;
8) quenching: quench in quenching oil;
9) clean.
CN201410744585.8A 2014-12-09 2014-12-09 Heat treatment process for 20CrMnMo gear Pending CN105734250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410744585.8A CN105734250A (en) 2014-12-09 2014-12-09 Heat treatment process for 20CrMnMo gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410744585.8A CN105734250A (en) 2014-12-09 2014-12-09 Heat treatment process for 20CrMnMo gear

Publications (1)

Publication Number Publication Date
CN105734250A true CN105734250A (en) 2016-07-06

Family

ID=56236969

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410744585.8A Pending CN105734250A (en) 2014-12-09 2014-12-09 Heat treatment process for 20CrMnMo gear

Country Status (1)

Country Link
CN (1) CN105734250A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107227431A (en) * 2017-07-27 2017-10-03 陈海燕 A kind of heat treatment method of high-strength gear
CN107253024A (en) * 2017-06-14 2017-10-17 康为同创集团有限公司 Barreled tooth flank processing technology
CN109628726A (en) * 2017-10-09 2019-04-16 徐州东鹏工具制造有限公司 A kind of heat treatment process of gear
CN109628718A (en) * 2017-10-09 2019-04-16 徐州东鹏工具制造有限公司 A kind of heat treatment process of bolt
CN111571156A (en) * 2020-05-29 2020-08-25 全椒县众联机械有限公司 Cylindrical gear machining method with high impact resistance

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107253024A (en) * 2017-06-14 2017-10-17 康为同创集团有限公司 Barreled tooth flank processing technology
CN107227431A (en) * 2017-07-27 2017-10-03 陈海燕 A kind of heat treatment method of high-strength gear
CN109628726A (en) * 2017-10-09 2019-04-16 徐州东鹏工具制造有限公司 A kind of heat treatment process of gear
CN109628718A (en) * 2017-10-09 2019-04-16 徐州东鹏工具制造有限公司 A kind of heat treatment process of bolt
CN111571156A (en) * 2020-05-29 2020-08-25 全椒县众联机械有限公司 Cylindrical gear machining method with high impact resistance

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Application publication date: 20160706