Experimental study on bending properties of 1000 MPa DP steel

Ke Shan Diao; Hao Min Jiang; Xin Ping Chen; Xiang Dong Wu

doi:10.3969/j.issn.1007-2012.2012.06.016

Experimental study on bending properties of 1000 MPa DP steel

Ke Shan Diao^*
, Hao Min Jiang
, Xin Ping Chen
, Xiang Dong Wu

^*Corresponding author for this work

School of Mechanical Engineering and Automation

Shanghai Baosteel Research Institute

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Bending property is one of the key parameters to evaluate the formability of UHSS (Utra High Strength Steel). In this paper, bending tests of 14 kinds of DP cold rolled steel and hot-dip coated steel were carried out and relative limit bending-radius R_min/t of 1000 MPa class DP steel and its influence factors were experimentally studied. The results showed that R_min/t of Baosteel DP980CR was about 2.0 and DP980GI was about 2.2, which was close to the imported steels. Different from plastic forming theory, R_min/t of UHSS does not have relationship with elongation. Anisotropy has great influence on UHSS's bendability and limit bending radius along rolling direction is obviously greater than that perpendicular to rolling direction. Besides, limit bending radius of UHSS is greatly influenced by the edge quality of specimens. Specimens with cutting edge has lower limit bending radius than those with milling edge. Moreover, specimens with edge burr on out-side of bend is worst, which R_min/t is about 3.6.

Original language	English
Pages (from-to)	79-83
Number of pages	5
Journal	Suxing Gongcheng Xuebao/Journal of Plasticity Engineering
Volume	19
Issue number	6
DOIs	https://doi.org/10.3969/j.issn.1007-2012.2012.06.016
State	Published - Dec 2012

Keywords

Bending properties
DP980
Relative bending-radius
Ultra high strength steel (UHSS)

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10.3969/j.issn.1007-2012.2012.06.016

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title = "Experimental study on bending properties of 1000 MPa DP steel",

abstract = "Bending property is one of the key parameters to evaluate the formability of UHSS (Utra High Strength Steel). In this paper, bending tests of 14 kinds of DP cold rolled steel and hot-dip coated steel were carried out and relative limit bending-radius Rmin/t of 1000 MPa class DP steel and its influence factors were experimentally studied. The results showed that Rmin/t of Baosteel DP980CR was about 2.0 and DP980GI was about 2.2, which was close to the imported steels. Different from plastic forming theory, Rmin/t of UHSS does not have relationship with elongation. Anisotropy has great influence on UHSS's bendability and limit bending radius along rolling direction is obviously greater than that perpendicular to rolling direction. Besides, limit bending radius of UHSS is greatly influenced by the edge quality of specimens. Specimens with cutting edge has lower limit bending radius than those with milling edge. Moreover, specimens with edge burr on out-side of bend is worst, which Rmin/t is about 3.6.",

keywords = "Bending properties, DP980, Relative bending-radius, Ultra high strength steel (UHSS)",

author = "Diao, \{Ke Shan\} and Jiang, \{Hao Min\} and Chen, \{Xin Ping\} and Wu, \{Xiang Dong\}",

year = "2012",

month = dec,

doi = "10.3969/j.issn.1007-2012.2012.06.016",

language = "英语",

volume = "19",

pages = "79--83",

journal = "Suxing Gongcheng Xuebao/Journal of Plasticity Engineering",

issn = "1007-2012",

publisher = "Beijing Res. Inst. of Mechanical and Elec. Technology",

number = "6",

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TY - JOUR

T1 - Experimental study on bending properties of 1000 MPa DP steel

AU - Diao, Ke Shan

AU - Jiang, Hao Min

AU - Chen, Xin Ping

AU - Wu, Xiang Dong

PY - 2012/12

Y1 - 2012/12

N2 - Bending property is one of the key parameters to evaluate the formability of UHSS (Utra High Strength Steel). In this paper, bending tests of 14 kinds of DP cold rolled steel and hot-dip coated steel were carried out and relative limit bending-radius Rmin/t of 1000 MPa class DP steel and its influence factors were experimentally studied. The results showed that Rmin/t of Baosteel DP980CR was about 2.0 and DP980GI was about 2.2, which was close to the imported steels. Different from plastic forming theory, Rmin/t of UHSS does not have relationship with elongation. Anisotropy has great influence on UHSS's bendability and limit bending radius along rolling direction is obviously greater than that perpendicular to rolling direction. Besides, limit bending radius of UHSS is greatly influenced by the edge quality of specimens. Specimens with cutting edge has lower limit bending radius than those with milling edge. Moreover, specimens with edge burr on out-side of bend is worst, which Rmin/t is about 3.6.

AB - Bending property is one of the key parameters to evaluate the formability of UHSS (Utra High Strength Steel). In this paper, bending tests of 14 kinds of DP cold rolled steel and hot-dip coated steel were carried out and relative limit bending-radius Rmin/t of 1000 MPa class DP steel and its influence factors were experimentally studied. The results showed that Rmin/t of Baosteel DP980CR was about 2.0 and DP980GI was about 2.2, which was close to the imported steels. Different from plastic forming theory, Rmin/t of UHSS does not have relationship with elongation. Anisotropy has great influence on UHSS's bendability and limit bending radius along rolling direction is obviously greater than that perpendicular to rolling direction. Besides, limit bending radius of UHSS is greatly influenced by the edge quality of specimens. Specimens with cutting edge has lower limit bending radius than those with milling edge. Moreover, specimens with edge burr on out-side of bend is worst, which Rmin/t is about 3.6.

KW - Bending properties

KW - DP980

KW - Relative bending-radius

KW - Ultra high strength steel (UHSS)

UR - https://www.scopus.com/pages/publications/84871906892

U2 - 10.3969/j.issn.1007-2012.2012.06.016

DO - 10.3969/j.issn.1007-2012.2012.06.016

M3 - 文章

AN - SCOPUS:84871906892

SN - 1007-2012

VL - 19

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JO - Suxing Gongcheng Xuebao/Journal of Plasticity Engineering

JF - Suxing Gongcheng Xuebao/Journal of Plasticity Engineering

IS - 6

ER -

Experimental study on bending properties of 1000 MPa DP steel

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Keywords

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