CN105710618A - 20CrMnTi gear machining process - Google Patents

20CrMnTi gear machining process Download PDF

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Publication number
CN105710618A
CN105710618A CN201410723950.7A CN201410723950A CN105710618A CN 105710618 A CN105710618 A CN 105710618A CN 201410723950 A CN201410723950 A CN 201410723950A CN 105710618 A CN105710618 A CN 105710618A
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CN
China
Prior art keywords
conducted
cooling
temperature
carburizing
air cooling
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
CN201410723950.7A
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Chinese (zh)
Inventor
张刚
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.)
Chongqing Ling Yi Machinery Co Ltd
Original Assignee
Chongqing Ling Yi Machinery Co Ltd
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 Chongqing Ling Yi Machinery Co Ltd filed Critical Chongqing Ling Yi Machinery Co Ltd
Priority to CN201410723950.7A priority Critical patent/CN105710618A/en
Publication of CN105710618A publication Critical patent/CN105710618A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a 20CrMnTi gear machining process. The 20CrMnTi gear machining process is characterized by comprising the following steps that (1) materials are prepared; (2) forging is conducted; (3) preheating treatment (normalizing) is conducted, specifically, a heat furnace is adopted for charging, a workpiece is put into the heat furnace when the temperature reaches 960 DEG C, the heating medium is air, the heating time is 30 min, and the cooling mode is air cooling; (4) rough machining is conducted, specifically, a normalized gear semi-finished product is machined according to requirements to reach the specified shape and size; (5) final heat treatment (carburization+quenching+tempering) is conducted, specifically, the carburization temperature is 925 +/-25 DEG C, the carburization media are methanol and kerosene, the heat preservation time is 2-4 h, the gear semi-finished product is subjected to slow furnace cooling to 850 DEG C and then discharged from the furnace, and air cooling is conducted; after carburization, pre-cooling is conducted to 840 DEG C, direct quenching is conducted, the preservation time is 1 h, then low-temperature tempering at the temperature of 150-250 DEG C is conducted, the heating time is 35 DEG C, the preservation time is 40 min, and then air cooling is conducted; (6) shot blasting is conducted; and (7) grinding is conducted.

Description

20CrMnTi Gearmaking Technology
Technical field
The present invention relates to a kind of 20CrMnTi Gearmaking Technology.
Background technology
20CrMnTi is middle quenching degree steel, and this steel is due to Cr, Mn, Ti multiple elements design alloying action, and quenching degree is good, and oil quenching cut off diameter is about 40mm;After carburizing and quenching, having higher wearability and high toughness, particularly Low temperature impact toughness is relatively good;The carburization process of steel is better, and Grain growth trend is little, can direct quenching, deform also smaller.20CrMnTi steel is typically used for manufacturing cross section at below 30mm, bears high speed, medium load or heavy load, and has the heavily loaded carburized parts impacted and rub, such as gear, gear shaft, gear ring, cross in circle, dog-clutch, worm screw etc..Current 20CrMnTi Gearmaking Technology is complicated, and after heat treatment, various aspects of performance can not meet requirement.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of 20CrMnTi Gearmaking Technology, and this technological method for processing is simple, can improve 20CrMnTi Gear Processing performance and service life.
For achieving the above object, the invention provides a kind of 20CrMnTi Gearmaking Technology, it is characterised in that comprise the steps: 1) get the raw materials ready;
2) forging;
3) conditioning treatment (normalizing): adopt hot stove to feed, loads workpiece when temperature reaches 960 DEG C, and adding thermal medium is air, and heat time heating time is 30min, and the type of cooling is air cooling;
4) roughing: the gear semi-finished product after normalizing are carried out machining as requested, reaches the shape and size of regulation;
5) finished heat treatment (carburizing+quenching+tempering): carburizing temperature 925 ± 25 DEG C, carburizing medium: methanol and kerosene, temperature retention time 2-4h, air cooling of coming out of the stove after slowly cooling to 850 DEG C with stove;Being pre-chilled to 840 DEG C of direct quenchings, temperature retention time 1h after carburizing, then carry out lonneal at 150 ~ 250 DEG C, take 35min heat time heating time, temperature retention time takes 40min, afterwards air cooling;
6) shot-peening;
7) grinding.
The invention has the beneficial effects as follows: technological method for processing of the present invention is simple, can improve 20CrMnTi Gear Processing performance and service life.
Detailed description of the invention
Technical scheme disclosed by the invention is a kind of 20CrMnTi Gearmaking Technology, it is characterised in that comprise the steps: 1) get the raw materials ready;
2) forging;
3) conditioning treatment (normalizing): adopt hot stove to feed, loads workpiece when temperature reaches 960 DEG C, and adding thermal medium is air, and heat time heating time is 30min, and the type of cooling is air cooling;
4) roughing: the gear semi-finished product after normalizing are carried out machining as requested, reaches the shape and size of regulation;
5) finished heat treatment (carburizing+quenching+tempering): carburizing temperature 925 ± 25 DEG C, carburizing medium: methanol and kerosene, temperature retention time 2-4h, air cooling of coming out of the stove after slowly cooling to 850 DEG C with stove;Being pre-chilled to 840 DEG C of direct quenchings, temperature retention time 1h after carburizing, then carry out lonneal at 150 ~ 250 DEG C, take 35min heat time heating time, temperature retention time takes 40min, afterwards air cooling;
6) shot-peening;
7) grinding.This technological method for processing is simple, can improve 20CrMnTi Gear Processing performance and service life.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 20CrMnTi Gearmaking Technology, it is characterised in that comprise the steps: 1) get the raw materials ready;2) forging;3) conditioning treatment (normalizing): adopt hot stove to feed, loads workpiece when temperature reaches 960 DEG C, and adding thermal medium is air, and heat time heating time is 30min, and the type of cooling is air cooling;4) roughing: the gear semi-finished product after normalizing are carried out machining as requested, reaches the shape and size of regulation;5) finished heat treatment (carburizing+quenching+tempering): carburizing temperature 925 ± 25 DEG C, carburizing medium: methanol and kerosene, temperature retention time 2-4h, air cooling of coming out of the stove after slowly cooling to 850 DEG C with stove;Being pre-chilled to 840 DEG C of direct quenchings, temperature retention time 1h after carburizing, then carry out lonneal at 150 ~ 250 DEG C, take 35min heat time heating time, temperature retention time takes 40min, afterwards air cooling;6) shot-peening;7) grinding.
CN201410723950.7A 2014-12-04 2014-12-04 20CrMnTi gear machining process Pending CN105710618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410723950.7A CN105710618A (en) 2014-12-04 2014-12-04 20CrMnTi gear machining process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410723950.7A CN105710618A (en) 2014-12-04 2014-12-04 20CrMnTi gear machining process

Publications (1)

Publication Number Publication Date
CN105710618A true CN105710618A (en) 2016-06-29

Family

ID=56146784

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410723950.7A Pending CN105710618A (en) 2014-12-04 2014-12-04 20CrMnTi gear machining process

Country Status (1)

Country Link
CN (1) CN105710618A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104120219A (en) * 2014-07-24 2014-10-29 成都亨通兆业精密机械有限公司 Gear production process
CN106002122A (en) * 2016-06-30 2016-10-12 娄土岭 Manufacturing process of automobile transmission shaft
CN110951962A (en) * 2019-12-16 2020-04-03 武汉理工大学 High-performance gear heat treatment method for realizing fine and homogenized structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104120219A (en) * 2014-07-24 2014-10-29 成都亨通兆业精密机械有限公司 Gear production process
CN106002122A (en) * 2016-06-30 2016-10-12 娄土岭 Manufacturing process of automobile transmission shaft
CN110951962A (en) * 2019-12-16 2020-04-03 武汉理工大学 High-performance gear heat treatment method for realizing fine and homogenized structure

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Application publication date: 20160629