The challenging conditions to China's steel industry currently are:insufficiency of natural resources, namely iron ore and coking coal,overcapacity of existing facilities,overconsumption of energy and heavy impact...The challenging conditions to China's steel industry currently are:insufficiency of natural resources, namely iron ore and coking coal,overcapacity of existing facilities,overconsumption of energy and heavy impact on global environment.The healthy development of China's steel industry depends on how we could deal with these challenges.展开更多
1. Exuberant supply and demand dominated the first half of 1993, but levelled out in the second half. In 1993, China’s steel production had sustained growth, with an output of 88.68 million tons of steel, 9.56 percen...1. Exuberant supply and demand dominated the first half of 1993, but levelled out in the second half. In 1993, China’s steel production had sustained growth, with an output of 88.68 million tons of steel, 9.56 percent increase over 1992, and 76 million tons of steel products, 13.58 percent up on the展开更多
1 Introduction The 21st century is coming and the world iron and steel making technology is facing an important technical evolution at this century turnover,which is reflected in two aspects:①Rapid development of tra...1 Introduction The 21st century is coming and the world iron and steel making technology is facing an important technical evolution at this century turnover,which is reflected in two aspects:①Rapid development of traditional iron&steel making technology with continuous regeneration;②Three major frontier techniques of metallurgy(smelting reduction;near-net-shape continuous展开更多
On Nov. 27th. China Metalh, rgical Industry Planning and Research Institute released the forecasted results for China＇s I ＆ S demand in 2013. According to the economic situation in China and overseas and the develop...On Nov. 27th. China Metalh, rgical Industry Planning and Research Institute released the forecasted results for China＇s I ＆ S demand in 2013. According to the economic situation in China and overseas and the development of downstream industries, it＇s estimated China＇s crude steel output in 2012 will reach 716 million tons up 4.5% YOY.展开更多
The paper briefs the recent development of China＇ s Iron ＆ Steel Industry from the view of a refractorie., worker. Some data and statistics have been revealed in the paper including total output of steel, geological...The paper briefs the recent development of China＇ s Iron ＆ Steel Industry from the view of a refractorie., worker. Some data and statistics have been revealed in the paper including total output of steel, geological distribution of key steel enterprises, productivity, facilities, technical and economical indices as well as technical advance achieved in. the last ten years. Structural adjustment and consolidation occurred in China＇s Iron ＆ Steel industy has also been described. The views on how much steel is demanded in China in the near future advanced by a steel expert has been accepted as the conclusion of the paper.展开更多
Since China began to pursue the policies of reform and opening, its iron and steel industry has been following the strategic principle of making use of "two resources, two markets and two kinds of funds," an...Since China began to pursue the policies of reform and opening, its iron and steel industry has been following the strategic principle of making use of "two resources, two markets and two kinds of funds," and has made eyecatching progress in expanding opening to the outside world and international cooperation. In 1993, the industry utilized some US$900 million in foreign capital,展开更多
GENERAL INFORMATIONThe Chinese Society of Metals is pleased to announcethat The Second International Conference on HSLASteels(HSLA’90)will be held in Beijing,China inOctober 1990.Much progress in research and devel-o...GENERAL INFORMATIONThe Chinese Society of Metals is pleased to announcethat The Second International Conference on HSLASteels(HSLA’90)will be held in Beijing,China inOctober 1990.Much progress in research and devel-opment of HSLA steels has been achieved by theworld’s metallurgical and materials community since展开更多
This paper first briefly introduces the history of the development of China valve steel from mainly adopting valve steel from the former Soviet Uinoin in the fifties, manufacturing by herself in the sixties, to introd...This paper first briefly introduces the history of the development of China valve steel from mainly adopting valve steel from the former Soviet Uinoin in the fifties, manufacturing by herself in the sixties, to introducing advanced valve steel from other countries and instituting Chinese valve steel system since the seventies.The demand of valve steel for China internal combustion engine including material specification and quantity required at present is discussed. The principal difficulties being faced with in the development of China valve steel at the moment are put forward. Finally, a detailed discussion is made on the development of China valve steel with suggstions of developing 5Cr8Si2 and MF811 martensitic steels, 21 2N austenitic steel used for gasoline engine, 23 8N austenitic steel used for diesel engine, 21 4NWNb high strength austenitic steel and LF2 and LF4 for valve alloy.[WT5”BZ〗展开更多
The objective of this study was to investigate the influence of strengthening mechanisms on the high-temperature mechanical properties of China low-activation ferrite(CLF-1)steel,which underwent thermodynamic design a...The objective of this study was to investigate the influence of strengthening mechanisms on the high-temperature mechanical properties of China low-activation ferrite(CLF-1)steel,which underwent thermodynamic design and thermo-mechanical treatment(TMT).The microstructure characterization in the normalized and tempered condition and the TMT condition was carried out using optical microscopy,X-ray diffractometer,and scanning electron microscopy with electron backscatter diffraction.High-resolution transmission electron microscopy was employed to determine the crystallographic structures of precipitated phases.The results indicated that the addition of Ti led to an increase in the allocation of C in MC phase and an enhancement in the content of MC phase.Compared to CLF-P steel in the normalized and tempered condition,a 1.5-fold increase in dislocation density and an order of magnitude improvement in MX phase density were achieved after TMT.The formation of high-density nano-scale MC phases during TMT played a significant role in precipitation strengthening due to their favorable coherent relationship with the matrix and low interfacial free energy.The excellent high-temperature mechanical properties observed in CLF-P steel after TMT can be attributed to the combined effects of precipitation strengthening,dislocation strengthening,and lath strengthening.展开更多
The use of econometric methods to analyze the relationship between our country steel price index and the international iron ore freight rate,time series stationarity test,cointegration test,Granger test of causality a...The use of econometric methods to analyze the relationship between our country steel price index and the international iron ore freight rate,time series stationarity test,cointegration test,Granger test of causality and model parameter estimation tools use,find that there is Granger causality between our country steel price index and the international iron ore freight rate,China' s steel price fluctuations to some extent affect the international iron ore freight.展开更多
Outdated Capacity to Be Eliminated The iron and steel capacity has reached 660 million tons in China, but the actual market requirement is only 470 million tons, so the excess-capacity is 190 million tons. National De...Outdated Capacity to Be Eliminated The iron and steel capacity has reached 660 million tons in China, but the actual market requirement is only 470 million tons, so the excess-capacity is 190 million tons. National Development and Reform Commission of China declared the new capacity and expansion capacity in iron and steel industry will not be authorized. 400 m^3 or below blast furnaces and converters and 30 t or below electric furnaces will be eliminated by the end of 2011.展开更多
Pickling waste liquid of the steel industry is included in National Hazardous Wastes Catalogue because of its high corrosion and large discharge. The techniques for treating pickling waste liquid （ H2SO4 ） in steel ...Pickling waste liquid of the steel industry is included in National Hazardous Wastes Catalogue because of its high corrosion and large discharge. The techniques for treating pickling waste liquid （ H2SO4 ） in steel industry is summarized. The advantages, disadvantages and applied ranges of all kinds of control technologies are comparatively analysed. The research trends of techniques for treating pickling waste liquid （ H2SO4 ） are the resource reclamation technologies in future which is pointed out in the paper.展开更多
[ Objective] The research aimed to study Cr wastewater treatment by steel slag. [ Method] Steel slag was used as adsorbent to remove Cr from wastewater, and influence factors of the Cr wastewater treatment by steel sl...[ Objective] The research aimed to study Cr wastewater treatment by steel slag. [ Method] Steel slag was used as adsorbent to remove Cr from wastewater, and influence factors of the Cr wastewater treatment by steel slag were studied. [ Result] Removal rate of Cr（VI） by steel slag was quite low, and the highest removal rate only reached 8.9%. Cr （III） removal by steel slag was quite effective. For 50 ml of Cr（VI） solution （100 mg/L）, after reduction, 0.30 g of steel slag （100 meshes） was added to oscillate for 35 min, and total Cr removal rate was up to 90%. Cr adsorption by steel slag was an exothermal process, and physical adsorption was dominant. Steel slag was suitable for treating acidic Cr wastewater, and its adsorption process on Cr followed Frenndlich isothermal adsorption model. [ Conduslon] It could reach the aim of ＂waste treat- ment by waste＂ bv usin~ steel slaq to treat Cr wastewater.展开更多
文摘The challenging conditions to China's steel industry currently are:insufficiency of natural resources, namely iron ore and coking coal,overcapacity of existing facilities,overconsumption of energy and heavy impact on global environment.The healthy development of China's steel industry depends on how we could deal with these challenges.
文摘1. Exuberant supply and demand dominated the first half of 1993, but levelled out in the second half. In 1993, China’s steel production had sustained growth, with an output of 88.68 million tons of steel, 9.56 percent increase over 1992, and 76 million tons of steel products, 13.58 percent up on the
文摘1 Introduction The 21st century is coming and the world iron and steel making technology is facing an important technical evolution at this century turnover,which is reflected in two aspects:①Rapid development of traditional iron&steel making technology with continuous regeneration;②Three major frontier techniques of metallurgy(smelting reduction;near-net-shape continuous
文摘On Nov. 27th. China Metalh, rgical Industry Planning and Research Institute released the forecasted results for China＇s I ＆ S demand in 2013. According to the economic situation in China and overseas and the development of downstream industries, it＇s estimated China＇s crude steel output in 2012 will reach 716 million tons up 4.5% YOY.
文摘The paper briefs the recent development of China＇ s Iron ＆ Steel Industry from the view of a refractorie., worker. Some data and statistics have been revealed in the paper including total output of steel, geological distribution of key steel enterprises, productivity, facilities, technical and economical indices as well as technical advance achieved in. the last ten years. Structural adjustment and consolidation occurred in China＇s Iron ＆ Steel industy has also been described. The views on how much steel is demanded in China in the near future advanced by a steel expert has been accepted as the conclusion of the paper.
文摘Since China began to pursue the policies of reform and opening, its iron and steel industry has been following the strategic principle of making use of "two resources, two markets and two kinds of funds," and has made eyecatching progress in expanding opening to the outside world and international cooperation. In 1993, the industry utilized some US$900 million in foreign capital,
文摘GENERAL INFORMATIONThe Chinese Society of Metals is pleased to announcethat The Second International Conference on HSLASteels(HSLA’90)will be held in Beijing,China inOctober 1990.Much progress in research and devel-opment of HSLA steels has been achieved by theworld’s metallurgical and materials community since
文摘This paper first briefly introduces the history of the development of China valve steel from mainly adopting valve steel from the former Soviet Uinoin in the fifties, manufacturing by herself in the sixties, to introducing advanced valve steel from other countries and instituting Chinese valve steel system since the seventies.The demand of valve steel for China internal combustion engine including material specification and quantity required at present is discussed. The principal difficulties being faced with in the development of China valve steel at the moment are put forward. Finally, a detailed discussion is made on the development of China valve steel with suggstions of developing 5Cr8Si2 and MF811 martensitic steels, 21 2N austenitic steel used for gasoline engine, 23 8N austenitic steel used for diesel engine, 21 4NWNb high strength austenitic steel and LF2 and LF4 for valve alloy.[WT5”BZ〗
基金This work was supported by the State Key Laboratory of Nuclear Physics and Technology,Peking University(No.NPT2021KF-ZX).
文摘The objective of this study was to investigate the influence of strengthening mechanisms on the high-temperature mechanical properties of China low-activation ferrite(CLF-1)steel,which underwent thermodynamic design and thermo-mechanical treatment(TMT).The microstructure characterization in the normalized and tempered condition and the TMT condition was carried out using optical microscopy,X-ray diffractometer,and scanning electron microscopy with electron backscatter diffraction.High-resolution transmission electron microscopy was employed to determine the crystallographic structures of precipitated phases.The results indicated that the addition of Ti led to an increase in the allocation of C in MC phase and an enhancement in the content of MC phase.Compared to CLF-P steel in the normalized and tempered condition,a 1.5-fold increase in dislocation density and an order of magnitude improvement in MX phase density were achieved after TMT.The formation of high-density nano-scale MC phases during TMT played a significant role in precipitation strengthening due to their favorable coherent relationship with the matrix and low interfacial free energy.The excellent high-temperature mechanical properties observed in CLF-P steel after TMT can be attributed to the combined effects of precipitation strengthening,dislocation strengthening,and lath strengthening.
文摘The use of econometric methods to analyze the relationship between our country steel price index and the international iron ore freight rate,time series stationarity test,cointegration test,Granger test of causality and model parameter estimation tools use,find that there is Granger causality between our country steel price index and the international iron ore freight rate,China' s steel price fluctuations to some extent affect the international iron ore freight.
文摘Outdated Capacity to Be Eliminated The iron and steel capacity has reached 660 million tons in China, but the actual market requirement is only 470 million tons, so the excess-capacity is 190 million tons. National Development and Reform Commission of China declared the new capacity and expansion capacity in iron and steel industry will not be authorized. 400 m^3 or below blast furnaces and converters and 30 t or below electric furnaces will be eliminated by the end of 2011.
基金Supported by Open Fund Project of Key Laboratory of Environmenta Engineering in Jiangsu,China( KF2012006)Undergraduate Practice Innovation Training Plan Project of Jiangsu Colleges and Universities, China ( Sujiaogao[2011]10)Research Fund Project of Nanjing College of Chemical Technology in 2012,China( NHKY-2012-06)
文摘Pickling waste liquid of the steel industry is included in National Hazardous Wastes Catalogue because of its high corrosion and large discharge. The techniques for treating pickling waste liquid （ H2SO4 ） in steel industry is summarized. The advantages, disadvantages and applied ranges of all kinds of control technologies are comparatively analysed. The research trends of techniques for treating pickling waste liquid （ H2SO4 ） are the resource reclamation technologies in future which is pointed out in the paper.
文摘[ Objective] The research aimed to study Cr wastewater treatment by steel slag. [ Method] Steel slag was used as adsorbent to remove Cr from wastewater, and influence factors of the Cr wastewater treatment by steel slag were studied. [ Result] Removal rate of Cr（VI） by steel slag was quite low, and the highest removal rate only reached 8.9%. Cr （III） removal by steel slag was quite effective. For 50 ml of Cr（VI） solution （100 mg/L）, after reduction, 0.30 g of steel slag （100 meshes） was added to oscillate for 35 min, and total Cr removal rate was up to 90%. Cr adsorption by steel slag was an exothermal process, and physical adsorption was dominant. Steel slag was suitable for treating acidic Cr wastewater, and its adsorption process on Cr followed Frenndlich isothermal adsorption model. [ Conduslon] It could reach the aim of ＂waste treat- ment by waste＂ bv usin~ steel slaq to treat Cr wastewater.
