锻造对粉末冶金纯铁软磁材料磁性能的影响

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Abstract The soft magnetic material of pure iron was prepared by powder metallurgy method, and then hot forging was carried out. The density and magnetic properties of the forgings at different forging temperatures and pressures were tested, the microstructure was detected and the optimal forging process of pure iron soft magnetic material of powder metallurgy was obtained. The results show that the density and magnetic properties of the forgings can be improved effectively by increasing the forging pressure and forging temperature. With the increase of forging pressure, the saturation magnetization Ms increases and the coercivity Hc decreases and then increases. With the increase of forging temperature, both Ms and Hc increase. The density and relative density of pure iron soft magnetic material are 7.821 g/cm and 99.38% respectively, Ms=2.024 T and Hc=997.3 A/m, at forging temperature and pressure of 1 200 ℃ and 1 166 MPa. After annealing at 1 450 ℃, the Hc of forgings decreases to 437.0 A/m.

Key words： powder metallurgy pure iron soft magnetic materials density magnetic property

Received: 22 January 2019 Published: 12 July 2019

ZTFLH:	TG156.2
	TG113.22⁺5

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	Articles by authors
	XIN Lijun
	JIANG Limin
	ZHANG Guang’an
	WANG Hongjian
	ZHOU Qi

Cite this article:

XIN Lijun,JIANG Limin,ZHANG Guang’an, et al. Effect of forging on magnetic properties of powder metallurgy pure iron soft magnetic materials[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(4): 334-339.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I4/334

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