Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd.

Jiangsu Shagang Group Co., Ltd.

Zhangjiagang Rongsheng Special Steel Co. Ltd.

Hangjiagang Hongchang Steel Plate Co., Ltd.

Zhangjiagang Hongchang Steel Plate Co., Ltd.

Han Ma

Lei Wang

Yu Zhang

Yun Zhou

Ping Li

Yixin Shi

Feng Fang

Jinxi Fan

Long Cheng

Yonglin Huang

Changdong Zou

Xiaofeng Cai

Huande Chen

Jiaqi Zhao

Xianjun Hu

Kui Shen

Yang Li

Jianchun Zhang

Longfei Zuo

The present invention reveals an ultra-thin ultra-high strength steel wire, a wire rod for an ultra-thin ultra-high strength steel wire and its producing method. The chemical components of the wire rod comprise in percentage by mass: C 0.90˜0.96%, Si 0.12˜0.30%, Mn 0.30˜0.65%, Cr 0.10˜0.30%, Al≤0.004%, Ti≤0.001%, Cu≤0.01%, Ni≤0.01%, S≤0.01%, P≤0.01%, O≤0.0006%, N≤0.0006%, and the balance is Fe and unavoidable impurity elements. The wire rod for the ultra-thin ultra-high strength steel wire may be used as a base material for producing the ultra-thin ultra-high strength steel wire having a diameter in a range of 50˜60 μm and a tensile strength larger than or equal to 4500 MPa.

Ultra-thin ultra-high strength steel wire, wire rod and method of producing wire rod

Disclosed are a high-strength steel bar and a production method therefor. The high-strength steel bar comprises, by mass percentage, the following chemical components: C: 0.15-0.32%, Si+Mn: 0.5-1.9%, Mn+Cr+Mo+Ni: 1.1-2.1%, V: 0.02-0.8%, at least one of Nb, Ti and Al: 0.01-0.3%, and the balance of Fe and inevitable impurities; wherein Mn=(2.5-3.5)Si, and a carbon equivalent satisfies Ceq=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15≤0.56%.

High-strength steel bar and production method thereof

The present invention discloses a wire rod for an ultrahigh-strength steel cord and a manufacturing method thereof. The manufacturing method includes: smelting molten steel where inclusions in sizes ≥5 μm are at a number density ≤0.5/mmand sizes of inclusions are ≤30 μm; casting the molten steel into an ingot blank with a center carbon segregation value of 0.92-1.08; cogging the ingot blank into an intermediate blank with a center carbon segregation value of 0.95-1.05; rolling the intermediate blank into a wire rod; and performing temperature control cooling on the wire rod to obtain a wire rod with high purity, high homogeneity and tensile strength ≤1,150 MPa. The wire rod may be used for an ultrahigh-strength steel cord with single tensile strength ≥3,600 MPa.

Wire rod for ultrahigh-strength steel cord and manufacturing method thereof

There is provided a high-carbon steel wire rod and a preparation method thereof. Wherein, the high-carbon steel wire rod comprising the following ingredients: C, Si, Mn, Cr, V, Ti and Fe. The high-carbon steel wire rod has satisfactory mechanical properties, including high strength with an average tensile strength of 1560 MPa as well as good plasticity with an average after-fracture shrinkage rate of 30% and an after-fracture elongation percentage larger than or equal to 9%, which can meet the performance requirements for producing 2300 MPa level pre-stressed steel strand.

High-carbon steel wire rod and preparation method therefor

Growing community of inventors

Suzhou, China

Han Ma