JPS5629142A - Measuring method of deterioration degree of ferrite heat-resisting steel - Google Patents

Measuring method of deterioration degree of ferrite heat-resisting steel

Info

Publication number
JPS5629142A
JPS5629142A JP10498679A JP10498679A JPS5629142A JP S5629142 A JPS5629142 A JP S5629142A JP 10498679 A JP10498679 A JP 10498679A JP 10498679 A JP10498679 A JP 10498679A JP S5629142 A JPS5629142 A JP S5629142A
Authority
JP
Japan
Prior art keywords
deterioration
resisting steel
heat
subgrain
size
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
JP10498679A
Other languages
Japanese (ja)
Inventor
Shuichi Komatsu
Shinichi Nakamura
Masako Nakabashi
Hiromitsu Takeda
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10498679A priority Critical patent/JPS5629142A/en
Publication of JPS5629142A publication Critical patent/JPS5629142A/en
Pending legal-status Critical Current

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  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE: To easily and surely measure the deterioration of time aging for heat- resisting steel, by measuring the size of subgrain near the initial austenite bondary of ferrite heat-resisting steel used at high temperature, and comparing it with the criterion.
CONSTITUTION: The ferrite heat-resisting steel used at high temperatures such as steam turbine members forms the subgrain with the rearrangement of transformation introduced at heat treatment near ex-austenite. The subgrain size is measured, and the degree of deterioration formed from the fatigue deterioration test is compared with the deterioration criterion chart showing the relation between the subgrain size and the deterioration to estimate the deterioration of heat-resisting steel. For example, if the subgrain size is 2.5μ at point A, and the ratio of the creep deterioration of steel to fatigue deterioration is analyzed as 6:4 from the operation pattern, the life expectancy can be estimated from the figure as about 40%. This value is well in agreement with the simulated deterioration test.
COPYRIGHT: (C)1981,JPO&Japio
JP10498679A 1979-08-20 1979-08-20 Measuring method of deterioration degree of ferrite heat-resisting steel Pending JPS5629142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10498679A JPS5629142A (en) 1979-08-20 1979-08-20 Measuring method of deterioration degree of ferrite heat-resisting steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10498679A JPS5629142A (en) 1979-08-20 1979-08-20 Measuring method of deterioration degree of ferrite heat-resisting steel

Publications (1)

Publication Number Publication Date
JPS5629142A true JPS5629142A (en) 1981-03-23

Family

ID=14395405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10498679A Pending JPS5629142A (en) 1979-08-20 1979-08-20 Measuring method of deterioration degree of ferrite heat-resisting steel

Country Status (1)

Country Link
JP (1) JPS5629142A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051347U (en) * 1983-09-19 1985-04-11 長田電機工業株式会社 Output compensation device for bearing type transmission
EP1298431A3 (en) * 2001-09-28 2004-02-18 Mitsubishi Heavy Industries, Ltd. High-precision method and apparatus for evaluating creep damage
CN101852701A (en) * 2010-05-11 2010-10-06 东方锅炉（集团）股份有限公司 Method for estimating long-term enduring performance of 9-12 Cr percent ferrite heat resistant steel
KR101195005B1 (en) 2010-12-09 2012-10-29 한국세라믹기술원 Cyclic Fatigue test Method for Inductor Ferrite
CN105651606A (en) * 2016-01-26 2016-06-08 苏州热工研究院有限公司 Method for assessing structural integrity of high-temperature and high-pressure welded member

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051347U (en) * 1983-09-19 1985-04-11 長田電機工業株式会社 Output compensation device for bearing type transmission
JPH0131805Y2 (en) * 1983-09-19 1989-09-29
EP1298431A3 (en) * 2001-09-28 2004-02-18 Mitsubishi Heavy Industries, Ltd. High-precision method and apparatus for evaluating creep damage
US6935552B2 (en) 2001-09-28 2005-08-30 Mitsubishi Heavy Industries, Ltd. High-precision method and apparatus for evaluating creep damage
KR100910424B1 (en) * 2001-09-28 2009-08-04 미츠비시 쥬고교 가부시키가이샤 High-precision method and apparatus for evaluating creep damage
CN101852701A (en) * 2010-05-11 2010-10-06 东方锅炉（集团）股份有限公司 Method for estimating long-term enduring performance of 9-12 Cr percent ferrite heat resistant steel
KR101195005B1 (en) 2010-12-09 2012-10-29 한국세라믹기술원 Cyclic Fatigue test Method for Inductor Ferrite
CN105651606A (en) * 2016-01-26 2016-06-08 苏州热工研究院有限公司 Method for assessing structural integrity of high-temperature and high-pressure welded member

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