Baoshan Iron & Steel Co., Ltd.

Nio Nextev Limited

Guodong Xu

Yan Wang

Jian Long Yang

Ruizhi Wang

Hui Li

Jun Yang

Lei Zheng

Junkai Wang

Caiyi Zhang

Yunan Wang

Shan Gao

Leilei Sun

Zhigang Ma

Jian Ming Liu

Tao Jiang

Fei Chen

Ruimin Wu

Liangliang Guo

Jian Liu

Zhengjie Fan

Rongjun Xu

Junjiang Liu

Chuanguo Zhang

Zhenhong Wei

Xitao Song

Kougen Wu

Changhong Ye

Yingchun Wang

Houjun Pang

Mingzhuo Bai

Jian Yang

Haisheng Xu

Zhengqi Xu

Yong Zhang

Xiaoming Ruan

A metallurgical technology probe insertion calibration method employing visual measurement and an insertion system thereof are provided. A vision sensor (), a cylindrical rod (), and a metallurgical technology probe () are used to construct an agreed region (). In the agreed region (), the vision sensor () acquires relative positions and orientations of the cylindrical rod () and the metallurgical technology probe (), and an acquired position and orientation result is used to control a driving device () to insert the cylindrical rod () into the metallurgical technology probe (). To improve the accuracy and reliability of the insertion, a standard probe () and a fixing device () are used together to perform effective calibration on an initial position, orientation, and axis in the insertion.

Metallurgical technology probe insertion calibration method employing visual measurement and insertion system thereof

Steel for coiled tubing with a low yield ratio and ultra-high strength and a preparation method thereof, wherein the chemical composition of the steel in mass percentage is: C: 0.05-0.16%, Si: 0.1-0.9%, Mn: 1.25-2.5%, P&#x2264;0.015%, S&#x2264;0.005%, Cr: 0.51-1.30%, Nb: 0.005-0.019%, V: 0.010-0.079%, Ti: 0.01-0.03%, Mo: 0.10-0.55%, Cu: 0.31-0.60%, Ni: 0.31-0.60%, Ca: 0.0010-0.0040%, Al: 0.01-0.05%, N&#x2264;0.008%, and the rest being Fe and inevitable impurity elements. The chemical composition combines the technologies of low temperature finishing rolling and low temperature coiling to obtain an MA constituent+bainite+ferrite multiphase structure. The steel has a low yield ratio and ultra-high strength with the following specific properties: yield strength&#x2265;620 MPa, tensile strength&#x2265;750 MPa, elongation&#x2265;11%, and yield ratio&#x2264;0.83, and is suitable for manufacturing coiled tubing with ultra-high strength having a grade of 110 ksi or higher.

Steel for coiled tubing with low yield ratio and ultra-high strength and preparation method thereof

A X80 pipeline steel with good strain-aging performance comprises (wt. %): C: 0.02-0.05%; Mn: 1.30-1.70%; Ni: 0.35-0.60%: Ti: 0.005-0.020%; Nb: 0.06-0.09%; Si: 0.10-0.30%; Al: 0.01-0.04%; N&#x2264;0.008%; P&#x2264;0.012%; S&#x2264;0.006%; Ca: 0.001-0.003%, and balance iron and unavoidable impurities.

X80 pipeline steel with good strain-aging performance, pipeline tube and method for producing same

A thick steel plate for high heat input welding and having great heat-affected area toughness and a manufacturing method therefor, comprising the steps of smelting, casting, rolling, and cooling. Chemical composition is properly controlled for the steel plate and satisfies 1&#x2264;Ti/N&#x2264;6 and Mg/Ti&#x3e;0.017, where effective S content in steel=S&#x2212;1.3 Mg&#x2212;0.8 Ca&#x2212;0.34 REM&#x2212;0.35 Zr, and effective S content in steel: 0.0003-0.003%; finely dispersed inclusions may be formed in the steel plate, and the amount of composite inclusion MgO+TiO+MnS in the steel plate is controlled at a proportion greater than or equal to 5%. The tensile strength of a base material so acquired is &#x2265;510 MPa, insofar as welding input energy is 200-400 kJ/cm, the average Charpy impact work of the steel plate at &#x2212;40 &#xb0; C. is 100 J or more, at the same time, the average Charpy aging impact work of the base material of &#xbd; thickness at &#x2212;40&#xb0; C. is 46 J or more.

Thick steel plate for high heat input welding and having great heat-affected area toughness and manufacturing method therefor

A thick steel plate for high heat input welding and having great heat-affected area toughness and a manufacturing method therefor, comprising the steps of smelting, casting, rolling, and cooling. Also, the chemical composition of the steel plate satisfies 1&#x2264;Ti/N&#x2264;6 and (Ca+REM+Zr)/Al&#x2265;0.11, where the effective S content in steel=S-0.8Ca-0.34REM-0.35Zr. and the effective S content in steel: 0.0006-0.005%; finely dispersed inclusions may be formed, and the amount of composite inclusion CaO+AlO+MnS+TiN in the steel plate is at a proportion of &#x2265;12%. With respect to welding in which the thickness of the steel plate is 50-70 mm, the tensile strength of a base material is &#x2265;510 MPa. and welding input energy is 200-400 kJ/cm, the average Charpy impact work of a welding heat-affected area of the steel plate at &#x2212;40&#xb0; C. is 100 J or more, and at the same time, the average Charpy aging impact work of the base material of &#xbd; thickness at &#x2212;40&#xb0; C. is 46 J or more.

The present invention proposes power battery pre-charge system and device for an electric vehicle, said power battery pre-charge device comprises a pre-charge circuit formed by a current source circuit and a bus capacitor, wherein said current source circuit provides a current for charging the bus capacitor, wherein said current source circuit includes a triode, a first resistor, a second resistor and at least two high-voltage MOSFET transistors. The power battery pre-charge system and device for an electric vehicle as disclosed in the present invention have high charging efficiency, low cost and low failure rate.

Power battery pre-charge system and device for electric vehicle

Growing community of inventors

Shanghai, China

Guodong Xu