Influence of Internal Quality of Gear on Strength and Life of Gear

The internal quality of gear is determined by material quality, forging quality and heat treatment process quality. Failure of about 35% of the gears is related to their poor internal quality. The influence of some items of internal quality of carburizing quenching gear (surface decarburization, int...

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Main Author: Xiaolu Zhu
Format: Article
Language:zho
Published: Editorial Office of Journal of Mechanical Transmission 2021-09-01
Series:Jixie chuandong
Subjects:
Online Access:http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2021.09.017
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author Xiaolu Zhu
author_facet Xiaolu Zhu
author_sort Xiaolu Zhu
collection DOAJ
description The internal quality of gear is determined by material quality, forging quality and heat treatment process quality. Failure of about 35% of the gears is related to their poor internal quality. The influence of some items of internal quality of carburizing quenching gear (surface decarburization, internal oxidation, coarse martensite, carbide structure, non-martensite structure, black structure, retained austenite, grain size, etc.) on gear strength and life are mainly discussed, the degree of influence is mostly expressed by the data of experimental results. Finally, the <italic>R-S-N</italic> curve test data(gear decarburization layer depth 0.2~0.3 mm, the bending endurance limit stress <italic>σ<sub>F</sub></italic><sub> lim</sub> at tooth root is reduced by 23%~50%) of carburizing and quenching gears with 5 materials show that the great influence of gear surface decarburization on gear bending fatigue strength.
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institution Kabale University
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publishDate 2021-09-01
publisher Editorial Office of Journal of Mechanical Transmission
record_format Article
series Jixie chuandong
spelling doaj-art-d3d60854690c425ba4d5c8a8c889c4f42025-01-10T14:47:57ZzhoEditorial Office of Journal of Mechanical TransmissionJixie chuandong1004-25392021-09-014511211818848819Influence of Internal Quality of Gear on Strength and Life of GearXiaolu ZhuThe internal quality of gear is determined by material quality, forging quality and heat treatment process quality. Failure of about 35% of the gears is related to their poor internal quality. The influence of some items of internal quality of carburizing quenching gear (surface decarburization, internal oxidation, coarse martensite, carbide structure, non-martensite structure, black structure, retained austenite, grain size, etc.) on gear strength and life are mainly discussed, the degree of influence is mostly expressed by the data of experimental results. Finally, the <italic>R-S-N</italic> curve test data(gear decarburization layer depth 0.2~0.3 mm, the bending endurance limit stress <italic>σ<sub>F</sub></italic><sub> lim</sub> at tooth root is reduced by 23%~50%) of carburizing and quenching gears with 5 materials show that the great influence of gear surface decarburization on gear bending fatigue strength.http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2021.09.017GearCarburizing quenchingInternal qualityHeat treatment defectStrength and life
spellingShingle Xiaolu Zhu
Influence of Internal Quality of Gear on Strength and Life of Gear
Jixie chuandong
Gear
Carburizing quenching
Internal quality
Heat treatment defect
Strength and life
title Influence of Internal Quality of Gear on Strength and Life of Gear
title_full Influence of Internal Quality of Gear on Strength and Life of Gear
title_fullStr Influence of Internal Quality of Gear on Strength and Life of Gear
title_full_unstemmed Influence of Internal Quality of Gear on Strength and Life of Gear
title_short Influence of Internal Quality of Gear on Strength and Life of Gear
title_sort influence of internal quality of gear on strength and life of gear
topic Gear
Carburizing quenching
Internal quality
Heat treatment defect
Strength and life
url http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2021.09.017
work_keys_str_mv AT xiaoluzhu influenceofinternalqualityofgearonstrengthandlifeofgear