MECHANICAL AND CORROSION PROPERTIES OF HIGH-STRENGTH 18-PERCENT CR AUSTENITIC STAINLESS-STEEL WELDMENT FOR BOILER

被引：6

作者：

OGAWA, K ^{[1
]}

SAWARAGI, Y ^{[1
]}

OTSUKA, N ^{[1
]}

HIRATA, H ^{[1
]}

NATORI, A ^{[1
]}

MATSUMOTO, S ^{[1
]}

机构：

[1] SUMIKIN WELDING IND LTD,AMAGASAKI,HYOGO 660,JAPAN

来源：

ISIJ INTERNATIONAL | 1995年 / 35卷 / 10期

关键词：

AUSTENITIC STAINLESS STEEL; WELDMENT; WELD METAL; CREEP; TENSILE STRENGTH; CORROSION RESISTANCE; BOILER TUBE;

D O I：

10.2355/isijinternational.35.1258

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The properties of weld metal of 18Cr heat resistant austenitic steel containing high copper, niobium and nitrogen were investigated to obtain the matching filler metal for an austentic stainless steel of 18Cr-9Ni-3Cu-Nb-N steel. This 18Cr-9Ni-SCu-Nb-N steel tube has been registered as KA-SUS304HJ1TB in the Japanese official standard for fired power plant materials. This steel tube has a high temperature strength 1.4 limes as high as the conventional 18Cr steel ASME TP347H. Welding material applicable to this steel is necessary in the fabrication. However, the weld metal consisting of the same chemistries as the base metal had a lower strength than that of the base metal. In this work, the effect of chemistries of molybdenum and nitrogen on the strength of weld metal was investigated. The addition of molybdenum up to 1 mass% was effective for improving the strength without a deterioration of the corrosion resistance. The nitrogen was also effective for improving the strength, but the nitrogen can be decreased by vaporizing during tungsten inert gas are welding. For improving the solubility of nitrogen in the molten pool, the addition of manganese was effective. From these findings, the chemistry of welding material was determined as 18Cr-16Ni-3Cu-1Mo-3Mn-0.6Nb-0.2N and the tube weldment with that welding material was evaluated in terms of mechanical properties including creep rupture property. it was confirmed that the weldment had comparable properties to the base metal.

引用

页码：1258 / 1264

页数：7

共 6 条

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[2]

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[3]

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[4]

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[5]

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[6]

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