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		题名	作者	年代	出处	被引量
	1	Relationship of microstructure transformation and hardening behavior of type 17-4 PH stainless steel显示文摘The relationship between the microstructure transformation of type 17-4 PH stainless steel and the aging hardening be- havior was investigated. The results showed that, when 17-4 PH stainless steel aging at 595°C, the bulk hardness of samples attains its peak value (42.5 HRC) for about 20 min, and then decreases at all time. TEM revealed the microstructure corresponding with peak hardness is that the fine spheroid-shape copper with the fcc crystal structure and the fiber-shape secondary carbide M23C6 precipitated from the lath martensite matrix. Both precipitations of copper and M23C6 are the reasons for strengthening of the alloy at this tem- perature. With the extension of holding time at this temperature, the copper and secondary carbide grow and lose the coherent rela- tionship with the matrix, so the bulk hardness of samples decreases.	Jun Wang Hong Zou Cong Li Ruling Zuo Shaoyu Qiu Baoluo Shen	2006	Journal of University of Science and Technology Beijing2006，13，3：	10

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