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Chaoyang, China

Lu H.,East China University of Science and Technology | Lu H.,CITIC Metal Co. | Wang Z.,Society of Automotive Engineers of China | Mingtu M.,China Automotive Engineering Research Institute | And 2 more authors.
Lecture Notes in Electrical Engineering | Year: 2013

Based on the multi-objective optimization and design of automotive body, the evaluation method of automotive lightweight is studied. An innovative evaluation method and the automotive lightweight comprehensive evaluation index E are presented, which is expressed by following formula E = m body/Ct × A × [ENCAP] × F [kg/Nm/ o × m2 × Hz × 104], and the weight of car body is associated with the model, stiffness of car body and safety of cars by this formula. The relationship between automotive lightweight and correlative functions is discussed. The evaluation method is confirmed by applying the data of 14 typical passenger cars. The relationship between evaluation index E and relational parameters are discussed, and some comparison and analysis are carried out, the sensitivity of E value for varying of relational parameters values is demonstrated, and the sensitivity is acceptable. And according to the E value, the lightweight level of a car can be defined, which is from 1 to 5 stars. A requirement of integrated fuel consumption for lightweight star level based on car mass is presented to be as a modifier to modify the final star-rating results of a car. This evaluation regulation considers the modal, stiffness, and sizes of car body, and safety of cars, and fuel consumption which are associated with weight of car body and car mass. A conclusion is attained that the evaluation method of lightweight presented by this paper is feasible, however, the details of evaluation regulation of automotive lightweight will be studied further, and an official new car evaluation regulation of automotive lightweight will be presented. According to the evaluation results and stars rating, customers can choose to buy a more lightweight and energy-saving car. And based on the stars rating, governments can also improve energy saving and emission reduction of automotive industry, by encouraging the car makers which produce the lightweight cars. © Springer-Verlag 2013. Source


Bian J.,Niobium Technology Asia | Mohrbacher H.,Niobelcon BVBA | Zhang J.-S.,Control Iron and Steel Research Institute, China | Zhao Y.-T.,Shougang Institute of Technology | And 2 more authors.
Advances in Manufacturing | Year: 2015

The fast-growing economy and the gradually established highway system have boosted the road transportation for both passenger and cargo over the last decade in China. From 2000 to 2010 Chinese GDP increased by around 10.15% annually and the sales of medium and heavy trucks by around 18.87% (sales increased from 0.2 million in 2000 to 1.3 million in 2010) according to the National Bureau of Statistics of People’s Republic of China. Today commercial vehicles consume almost the same amount of fuel as passenger cars in China although the number of commercial vehicles is only about one fourth of passenger cars. It is estimated that around 50% of imported fuel to China each year will be consumed by vehicle transportation. This situation will worsen fuel shortage problems in the long run and at the same time it is partially responsible for the ever-worsening air pollution in China. Due to the widespread overloading in China, lightweight development in commercial vehicles has fallen far behind that of passenger cars with the consequences that Chinese commercial vehicles consume in average about 20% more fuel, especially the heavy trucks, compared to European models. Under these circumstances it is essential to reduce the vehicle fuel consumption and increase the transport efficiency. The key solution thereby is to implement lightweight design in commercial vehicles as it has been successfully practiced over the last decade in the passenger cars. This paper summarizes highlights given in presentations during the “International seminar on the application of high strength steels in light weight commercial vehicles” with the focus on the development and application of Nb alloyed high performance steels made for lightweight commercial vehicles. © 2015, The Author(s). Source


Yang C.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing | Zhang W.,CITIC Metal Co. | Li H.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing | Chen X.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing | Zhai Q.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing
TMS Annual Meeting | Year: 2015

In this paper, ductile iron material with different content of niobium was prepared by a scientific melting method. Image Analysis Software was used to studied the effect of niobium microalloying on both pearlite content and pearlite lamellar spacing in ductile iron quantitatively. The results showed that the addition of a small amount of niobium could increase the pearlite content and decrease pearlite lamellar spacing of ductile iron effectively. Copyright © 2015 by The Minerals, Metals & Materials Society. All rights reserved. Source


Li H.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing | Yang C.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing | Wei Z.,CITIC Metal Co. | Chen X.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing | Zhai Q.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing
TMS Annual Meeting | Year: 2015

The Nb-rich phase generated by the addition of trace amounts of Nb(<0.1wt%) \ and the effects of different content of Nb on the morphology and distribution of graphite in ductile iron were studied in this paper. The results showed that when the content of niobium less than 0.1 wt%, the two-dimensional morphology of Nb-rich phase existed in microalloyed ductile iron were mainly regular pattern such as square, triangle, polygon etc. Besides, Nb-rich phase in large size distributed in the matrix with a certain distance from graphite. With the increasing amount of niobium, the dispersion degree of graphite diameter, average diameter and roundness increased slightly, and the number of graphite decreased slightly. Copyright © 2015 by The Minerals, Metals & Materials Society. All rights reserved. Source


Zhang Y.,CITIC Metal Co. | Shang C.,University of Science and Technology Beijing | Guo A.,CITIC Metal Co. | Zheng L.,Baosteel | And 2 more authors.
Energy Materials 2014, Conference Proceedings | Year: 2014

In order to solve the pollution problem emerging in China recently, China's central government is making great efforts to raise the percentage of natural gas consumption in the China's primary energy mix, which needs to construct big pipelines to transport natural gas from the nation's resource-rich western regions to the energy-starved east, as well as import from the Central Asia and Russia. With this mainstream trend, high strength, high toughness, heavy gauge, and large diameter pipeline steels are needed to improve the transportation efficiency. This paper describes the latest progresses in Nb-bearing high strength pipeline steels with regard to metallurgical design, development and application, including X80 coil with a thickness up to 22.0mm, X80 plate with a diameter as much as 1422mm, X80 plate with low-temperature requirements and low-Mn sour service X65 for harsh sour service environments. Moreover, based on widely accepted TMCP and HTP practices with low carbon and Nb micro-alloying design, this paper also investigated some new metallurgical phenomena based on powerful rolling mills and heavy ACC equipment. Source

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