Effect of Extrusion-Forging Temperature on Microstructure and Mechanical Properties of Solid State Regenerated H11 Steel

doi:10.12068/j.issn.1005-3026.2020.10.005

Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (10): 1394-1401.DOI: 10.12068/j.issn.1005-3026.2020.10.005

• Materials & Metallurgy • Previous Articles Next Articles

Effect of Extrusion-Forging Temperature on Microstructure and Mechanical Properties of Solid State Regenerated H11 Steel

LIU Xing-gang¹， WANG Ya-qin¹， MA Zhao-jun²， ZHANG De-liang¹

1.School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China; 2. Goertek Co.， Ltd.， Weifang 261000， China.

Received:2020-04-07 Revised:2020-04-07 Online:2020-10-15 Published:2020-10-20
Contact: WANG Ya-qin
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Abstract

Abstract: Using the powders from the recovered machining chips of H11 steel as raw materials， the samples were prepared by powder compacting and extrusion-forging processes. Using tensile test， hardness test， XRD， SEM， TEM and etc.， the effects of different extrusion-forging temperatures in a range of 1100~1220℃ on the microstructure and mechanical properties of solid regenerated H11 steel were studied. The results show that the sample has a good consolidation effect. When the extrusion-forging temperature is 1220℃， the density of the sample can reach up to 95.8%. After the temperature is over 1140℃， the Fe₇C₃ phase precipitates in the matrix. With increasing extrusion-forging temperature from 1100℃ to 1220℃， the hardness along the extrusion direction increases from 2.5GPa to 4.4GPa and the tensile strength increases from 451MPa to 808MPa， while the elongation decreases from 3.1% to 0.7%.

Key words: H11 steel, extrusion-forging temperature, thermal die steel, solid state regeneration, turning chips

CLC Number:

TF763.2

LIU Xing-gang， WANG Ya-qin， MA Zhao-jun， ZHANG De-liang. Effect of Extrusion-Forging Temperature on Microstructure and Mechanical Properties of Solid State Regenerated H11 Steel[J]. Journal of Northeastern University Natural Science, 2020, 41(10): 1394-1401.

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Effect of Extrusion-Forging Temperature on Microstructure and Mechanical Properties of Solid State Regenerated H11 Steel

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