RESEARCH ON HIGH TEMPERATURE PLASTICITY OF X70 PIPELINE STEEL IN CONTINUOUS CASTING

ZHANG Chen

Volume 25 Issue 4

Oct. 2004

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ZHANG Chen. RESEARCH ON HIGH TEMPERATURE PLASTICITY OF X70 PIPELINE STEEL IN CONTINUOUS CASTING[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(4): 37-41.

Citation:

ZHANG Chen. RESEARCH ON HIGH TEMPERATURE PLASTICITY OF X70 PIPELINE STEEL IN CONTINUOUS CASTING[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(4): 37-41.

ZHANG Chen. RESEARCH ON HIGH TEMPERATURE PLASTICITY OF X70 PIPELINE STEEL IN CONTINUOUS CASTING[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(4): 37-41.

Citation:

ZHANG Chen. RESEARCH ON HIGH TEMPERATURE PLASTICITY OF X70 PIPELINE STEEL IN CONTINUOUS CASTING[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(4): 37-41.

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RESEARCH ON HIGH TEMPERATURE PLASTICITY OF X70 PIPELINE STEEL IN CONTINUOUS CASTING

ZHANG Chen

R&D Center of Baosteel, Shanghai 201900, China

Received Date: 2004-08-20
Available Online: 2023-12-07

Abstract

Abstract

Tensile testing for X70 pipeline steels in 600~1 350 ℃ was carried out, and the fracture micrographs of samples in different temperature were examined with SEM and metallographic microscope. The effects of C, N content on area reduction (RA) were examined. The results show 700~900 ℃ is the embrittlement region III, where the RA is lower than 40%. The plasticity decreases in 1 000~1 250 ℃ with the increase of C and N, while the plasticity is improved slightly in region III. It's the contribution of pinning function of carbonitride of Nb, V precipitated in grain boundary.
- X70 pipeline steel,
- continuous casting,
- plasticity

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