Effect of Nickel Content on Mechanical Property and Microstructure for Sulfide Stress Corrosion High-Strength Steel


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Two types of steels which are different in Ni content were tested in three groups of different quenching temperatures and same tempering temperature respectively under the same conditions, and then tested the mechanical properties and observated the microstructure, comparing with the effects of different Ni content on the microstructure and properties. When 1Ni-steel is under the different quenching temperature, its tensile strength range is 1269-1290MPa and changes subtlely. The yield strength and impact energy reach the highest at 910°C, and the mircostructure is fine and uniform. With the quenching temperature increasing, the strength of 3Ni-steel decreases ,but the toughness increases comparing with both kinds of the steels, the microstructure of 3Ni-steel has much more hard phases in its tempered martensite microstructure. Its tensile strength, yield strength and toughness are higher than 1Ni-steel at the lower quenching temperature. The inclusions of 3 Ni-steel are characterized by spheroidization and refinement. In the NACE-A test, the SSC resistance of 3Ni-steel is better than that of 1Ni-steel, which indicates that the high Ni steel has better comprehensive properties.



Edited by:

Umemura Kazuo, Harald Justnes, Ki-Bum Kim and Takashiro Akitsu




S. Zhang et al., "Effect of Nickel Content on Mechanical Property and Microstructure for Sulfide Stress Corrosion High-Strength Steel", Materials Science Forum, Vol. 939, pp. 16-22, 2018

Online since:

November 2018




* - Corresponding Author

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