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| Causes Analysis of Uneven?Hardness of 17-7PH Stainless Steel Part |
| GU Zhuo-lun1�� TU Zheng1�� HUANG Li 2�� WU Yi-wen3 |
��1. Shanghai Aircraft Manufacturing Co.,Ltd., Shanghai 200436, China
2. Shanghai Haiying Machine Factory, Shanghai 200436, China
3. Shanghai Entry-Exit Inspection and Quarantine Bureau,Technical Center of Raw Materials , Shanghai 200135, China�� |
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Abstract When the parts of 17-7PH(0Cr17Ni7Al)precipitation hardening stainless steel was tested by hardness test and fluorescent flaw detection, it was found that the parts was uneven hardness and linear defects inside. The raw material was analyzed by metalloscope, EDS and micro hardness tester. The results show that the main causes to induce the uneven hardness and linear defects is the uneven microscopic structure and ferrite segregation streamers .
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Received: 14 January 2014
Published: 12 December 2014
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2014, Vol. 32 
