Research and Development of 700 MPa Grade High Strength Hot Rolled Dual Phase Steel DP700

张建苏; 朱红丹

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Research and Development of 700 MPa Grade High Strength Hot Rolled Dual Phase Steel DP700

更新时间：2026-01-21

- Research and Development of 700 MPa Grade High Strength Hot Rolled Dual Phase Steel DP700
- Special Steel Vol. 41, Issue 6, Pages: 77-80(2020)
- 作者机构：
  
  1. 宝山钢铁股份有限公司研究院,上海,201900
  2. 宝钢股份梅钢公司制造管理部,南京,210039
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：10 June 2020，
  
  Online First：09 May 2022，
  
  Published：09 May 2020
- 稿件说明：
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张建苏, 朱红丹. Research and Development of 700 MPa Grade High Strength Hot Rolled Dual Phase Steel DP700[J]. Special Steel, 2020, 41(6): 77-80.
DOI：

张建苏, 朱红丹. Research and Development of 700 MPa Grade High Strength Hot Rolled Dual Phase Steel DP700[J]. Special Steel, 2020, 41(6): 77-80. DOI：

摘要

阐述了在宝钢梅山基地1780热轧机生产线上开发的700MPa级热轧双相钢DP700（/%:C 0.08～0.12

Si 0.08～0.12

Mn 1.30～1.150

P≤0.015

S≤0.005

Cr 0.50～0.70

Ca≥0.0015

Al≥0.015）工艺和性能

该钢板表面质量优良

屈服强度≥400 MPa

抗拉强度≥700 MPa

断后伸长率≥17%（b=20 mm

=80 mm）

扩孔率≥35%

50%存活率的疲劳极限达475 MPa。结果表明

DP700钢是一种具有良好应用前景的新型汽车零部件材料。

Abstract

The process and properties of 700MPa grade hot rolled dual phase steel DP700 (/% : C 0.08 ~ 0.12

Si 0.08 ~0.12

Mn 1.30 ~ 1.150

P≤ 0.015

S ≤0

005

Cr 0.50 ~0.70

Ca ≥0.0015

Al≥0.015) development at Baosteel Meishan 1780 hot rolling mill are summarized. The developed plate has superior surface quality

its properties are Yield strength≥400 MPa

Tensile strength≥700 MPa

Elongation after fracture N≥ 17% (b = 20 mm

= 80 mm)

Hole expansion rate ≥35%

50% survival rate fatigue limit 475 MPa. Results show that the steel DP700 is one of new material for Auto industry with good application prospect.

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