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EVALUATION OF RESIDUAL LIFE OF HEAT RESISTANCE STEEL
专利权人:
MITSUBISHI HEAVY IND LTD
发明人:
NISHIMURA NOBUHIKO,MASUYAMA FUJIMITSU
申请号:
JP19860075985
公开号:
JPS62232565(A)
申请日:
1986.04.02
申请国别(地区):
日本
年份:
1987
代理人:
摘要:
PURPOSE:To certainly evaluate residual life in a non-destructive manner within a short time, by measuring the diameter and surface density of minute voids generated in the crystal grain boundary of heat resistant steel and comparing the same with a residual life evaluation reference line chart preliminarily calculated. CONSTITUTION:The minute voids on the surface of heat resistant steel having the same material quality as a member to be inspected and used under various conditions are observed by a scanning type electronic microscope to measure the diameter and surface density thereof and line density being a product of both of them is calculated to form a residual life evaluation reference line chart. Next, the diameter and surface density of minute voids of heat resistant steel having been used for a long time are measured by a similar method. Because the length of the minute voids per a unit time being the product of the diameter and surface density is correlative to a creep breaking life consumption rate, a residual life estimation value is obtained from at least one of the reference line chart and measured physical values. Therefore, residual life can be certainly evaluated in a non-destructive manner within a short time.
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中国工程科技知识中心
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http://www.ckcest.cn/home/

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