Effect of Ti on the solidification structure and thermal deformation properties of 304B7

ZHANG Silong; YANG Lilin; ZHANG Wenduan; ZHAO Liping

doi:10.7513/j.issn.1004-7638.2025.04.021

Volume 46 Issue 4

Aug. 2025

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ZHANG Silong, YANG Lilin, ZHANG Wenduan, ZHAO Liping. Effect of Ti on the solidification structure and thermal deformation properties of 304B7[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 160-165. doi: 10.7513/j.issn.1004-7638.2025.04.021

Citation:

ZHANG Silong, YANG Lilin, ZHANG Wenduan, ZHAO Liping. Effect of Ti on the solidification structure and thermal deformation properties of 304B7[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 160-165. doi: 10.7513/j.issn.1004-7638.2025.04.021

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Effect of Ti on the solidification structure and thermal deformation properties of 304B7

doi: 10.7513/j.issn.1004-7638.2025.04.021

Inner Mongolia University of Science and Technology, Inner Mongolia Key Laboratory of New Metal Material, Baotou 014017, Inner Mongolia, China

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Received Date: 2025-01-01
Available Online: 2025-08-31
Publish Date: 2025-08-31

Abstract

Abstract

The 304B7 stainless steel was taken as the research object, and different contents of Ti element were added to cast the test steels. The hot compression test was conducted on the test steel using a thermal simulator to simulate the hot rolling process. Optical microscope, X-ray diffractometer, scanning electron microscope, and electron probe were used to analyze the phase composition and microstructure of the as cast and hot compressed test steel. The results indicate that there are a large number of continuous network-like eutectic borides in the as cast test steel. With the addition of Ti, some borides transform from elongated (Fe,Cr)₂B to granular TiB₂. After hot compression, the austenite grains of the test steel are elongated along the compression direction, and the borides are broken from long strips into short rod-shaped shapes. The higher the hot compression temperature, the lower the deformation resistance of the test steel. The peak flow stress of the test steel containing 0.5% Ti is the relatively smallest during hot compression, indicating better hot workability.
- Ti,
- 304B7 stainless steel,
- boride,
- thermal deformation

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References(16)

References

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