Surface Defects on Forged Nut of Stainless Steel

Surface Defects on Forged Nut of Stainless Steel

Surface quality of nuts used in gas pipe joints is an important issue because the surface state affects the fatigue characteristics. Surface defects of nuts produced by warm forging from a stainless steel are observed and the cause of defect generation is discussed based on the numerical results of...

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Main Authors: Sasa Tomonori, Wang Zhigang, Soga Takashi
Format: Article
Language:English
Published: EDP Sciences 2016-01-01
Series:MATEC Web of Conferences
Online Access:http://dx.doi.org/10.1051/matecconf/20164504002
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spelling doaj-afb08e9a4ffa4b1785cc00b2951bcf892021-02-02T01:55:02ZengEDP SciencesMATEC Web of Conferences2261-236X2016-01-01450400210.1051/matecconf/20164504002matecconf_icmm2016_04002Surface Defects on Forged Nut of Stainless SteelSasa Tomonori0Wang Zhigang1Soga Takashi2Dept. of Mechanical Engineering, Gifu UniversityDept. of Mechanical Engineering, Gifu UniversityIhara Science Corporation, Ihara Takanawa BuildingSurface quality of nuts used in gas pipe joints is an important issue because the surface state affects the fatigue characteristics. Surface defects of nuts produced by warm forging from a stainless steel are observed and the cause of defect generation is discussed based on the numerical results of FEM simulation. It is revealed that there exists the lap defect on the drawn wire surface with an opened end and the surface defects on the forged nut are generated by the tensile stress during forging since there exists a moment at almost the whole area of the billet surface that a tensile stress over 200MPa is generated during nut forging.http://dx.doi.org/10.1051/matecconf/20164504002
collection DOAJ
language English
format Article
sources DOAJ
author Sasa Tomonori
Wang Zhigang
Soga Takashi
spellingShingle Sasa Tomonori
Wang Zhigang
Soga Takashi
Surface Defects on Forged Nut of Stainless Steel
MATEC Web of Conferences
author_facet Sasa Tomonori
Wang Zhigang
Soga Takashi
author_sort Sasa Tomonori
title Surface Defects on Forged Nut of Stainless Steel
title_short Surface Defects on Forged Nut of Stainless Steel
title_full Surface Defects on Forged Nut of Stainless Steel
title_fullStr Surface Defects on Forged Nut of Stainless Steel
title_full_unstemmed Surface Defects on Forged Nut of Stainless Steel
title_sort surface defects on forged nut of stainless steel
publisher EDP Sciences
series MATEC Web of Conferences
issn 2261-236X
publishDate 2016-01-01
description Surface quality of nuts used in gas pipe joints is an important issue because the surface state affects the fatigue characteristics. Surface defects of nuts produced by warm forging from a stainless steel are observed and the cause of defect generation is discussed based on the numerical results of FEM simulation. It is revealed that there exists the lap defect on the drawn wire surface with an opened end and the surface defects on the forged nut are generated by the tensile stress during forging since there exists a moment at almost the whole area of the billet surface that a tensile stress over 200MPa is generated during nut forging.
url http://dx.doi.org/10.1051/matecconf/20164504002
work_keys_str_mv AT sasatomonori surfacedefectsonforgednutofstainlesssteel
AT wangzhigang surfacedefectsonforgednutofstainlesssteel
AT sogatakashi surfacedefectsonforgednutofstainlesssteel
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