Acta Metallurgica Sinica (English Letters) ›› 1997, Vol. 10 ›› Issue (3): 256-262.
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P.Zhang;B.Z Guand B. Ling (Beijing Institute of Aeronautical Materials, Beijing 100095, China)
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Abstract: The dst of tempering temperature on strength, impact toughness, fracture toughness and stress corrosion cracking (SCC) behavior of 16NiCo Steel in an aqueons solutiou of 3.5 pct NaCl was stndied. The test compromise between strength, tonghness, and SCC resistance was obtained after 510℃ tempering. Under these conditions, KISCC is~75 MPam with fracture toughness of~75 MPam, impact toughness of~150J/cm2 and a gield strength of~1580 MPa. The improved stress corrosion crack-ing resistance at 510℃ tempering may be related to the loss of stress resulting from M2C/matrix coherency and the recovery of the dislocalion substrvcture. These would lead to a decreased concentration of hydrogen.
Key words: streas corrosion, secondary hardeing, 16NiCo steel
P.Zhang;B.Z Guand B. Ling (Beijing Institute of Aeronautical Materials, Beijing 100095, China). STRESS CORROSION CRACKING IN 16NiCo STEEL[J]. Acta Metallurgica Sinica (English Letters), 1997, 10(3): 256-262.
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