scholarly journals Some Topics on the Impact Tensile Test of Iron and Steel

1969 ◽  
Vol 18 (190) ◽  
pp. 579-589 ◽  
Author(s):  
Seita SAKUI
Keyword(s):  
Tensile Test ◽  
Iron And Steel ◽  
The Impact

scholarly journals Improving Rheological and Mechanical Properties of Various Virgin and Recycled Polypropylenes by Blending with Long-Chain Branched Polypropylene

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1137
Author(s):  
Sascha Stanic ◽  
Thomas Koch ◽  
Klaus Schmid ◽  
Simone Knaus ◽  
Vasiliki-Maria Archodoulaki
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Tensile Test ◽  
Reactive Extrusion ◽  
Original Material ◽  
Melt Flow Rate ◽  
Single Screw Extruder ◽  
Pp Blends ◽  
The Impact ◽  
Long Chain

Blends of two long-chain branched polypropylenes (LCB-PP) and five linear polypropylenes (L-PP) were prepared in a single screw extruder at 240 °C. The two LCB-PPs were self-created via reactive extrusion at 180 °C by using dimyristyl peroxydicarbonate (PODIC C126) and dilauroyl peroxide (LP) as peroxides. For blending two virgin and three recycled PPs like coffee caps, yoghurt cups and buckets with different melt flow rate (MFR) values were used. The influence of using blends was assessed by investigating the rheological (dynamic and extensional rheology) and mechanical properties (tensile test and impact tensile test). The dynamic rheology indicated that the molecular weight as well as the molecular weight distribution could be increased or broadened. Also the melt strength behavior could be improved by using the two peroxide modified LCB-PP blends on the basis of PODIC C126 or PEROXAN LP (dilauroyl peroxide). In addition, the mechanical properties were consistently enhanced or at least kept constant compared to the original material. In particular, the impact tensile strength but also the elongation at break could be increased considerably. This study showed that the blending of LCB-PP can increase the investigated properties and represents a promising option, especially when using recycled PP, which demonstrates a real “up-cycling” process.

scholarly journals Management of Lime in Steel

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 686 ◽  
Author(s):  
Sanjeev Manocha ◽  
François Ponchon
Keyword(s):  
Critical Role ◽  
Steel Production ◽  
Developed Countries ◽  
Basic Oxygen Furnace ◽  
Environmental Benefits ◽  
Steelmaking Process ◽  
Iron And Steel ◽  
Refractory Life ◽  
The Impact ◽  
Local Sourcing

The EU28 total lime demand in 2017 was estimated at about 20 million tons, out of which about 40% are consumed in the iron and steel industry. Steel remains the major consumer after environment and construction. The lime industry is quite mature and consolidated in developed countries, with enough reserves and production to serve regional markets while being fragmented in developing nations where steel producers rely on local sourcing. There is relatively very little trade for lime worldwide. Lime has a critical role at different steps of the steelmaking process, and especially to make a good slag facilitating the removal of sulphur and phosphorus, and for providing a safer platform to withstand high intensity arc plasma in the electric arc furnace (EAF), and violent reactions in the basic oxygen furnace (BOF). Lime quality and quantity has a direct effect on slag quality, which affects metallurgical results, refractory life, liquid metal yield, and productivity, and therefore the total cost of the steel production. In this paper, we present the importance of careful selection in the limestone and calcination process, which influences critical lime quality characteristics. We shall further elaborate on the impact of lime characteristics in the optimization of the steelmaking process, metallurgical benefits, overall cost impact, potential savings, and environmental benefits.

scholarly journals Does Emission Trading Improve Carbon Emission Efficiency of China’s Iron and Steel Industry? An Exploration Using a DEA-SBM and Difference-In-Differences Approach

2021 ◽  
Author(s):  
Xiping Wang ◽  
Sujing Wang
Keyword(s):  
Steel Industry ◽  
Carbon Emission ◽  
Emission Trading ◽  
Energy Structure ◽  
Iron And Steel Industry ◽  
Low Carbon ◽  
Difference In Differences ◽  
Iron And Steel ◽  
Emission Efficiency ◽  
The Impact

Abstract As an effective tool of carbon emission reduction, emission trading has been widely used in many countries. Since 2013, China implemented carbon emission trading in seven provinces and cities, with iron and steel industry included in the first batch of pilot industries. This study attempts to explore the policy effect of emission trading on iron and steel industry in order to provide data and theoretical support for the low-carbon development of iron and steel industry as well as the optimization of carbon market. With panel data of China’s 29 provinces from 2006 to 2017, this study adopted a DEA-SBM model to measure carbon emission efficiency of China’s iron and steel industry (CEI) and a difference-in-differences (DID) method to explore the impact of emission trading on CEI. Moreover, regional heterogeneity and influencing mechanisms were further investigated, respectively. The results indicate that: (1) China's emission trading has a significant and sustained effect on carbon abatement of iron and steel industry, increasing the annual average CEI by 12.6% in pilot provinces. (2) The policy effects are heterogeneous across diverse regions. Higher impacts are found in the western and eastern regions, whereas the central region is not significant. (3) Emission trading improves CEI by stimulating technology innovation, reducing energy intensity, and adjusting energy structure. (4) Economic level and industrial structure are negatively related to CEI, while environmental governance and openness degree have no obvious impacts. Finally, according to the results and conclusions, some specific suggestions are proposed.

The U. S.-Canada Free Trade Agreement: Impact on the U. S. Steel Industry

1994 ◽  
Vol 38 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Harold R. Williams ◽  
Thomas J. Botzman
Keyword(s):  
Free Trade ◽  
Multiple Linear Regression Model ◽  
Trade Agreement ◽  
Single Equation ◽  
Steel Mill ◽  
Iron And Steel ◽  
Explanatory Variables ◽  
Income Elasticities ◽  
Price And Income Elasticities ◽  
The Impact

This study empirically estimates the impact of the U. S.-Canada FTA on specific iron and steel exports and imports using quarterly data for the period January 1981 to December 1990. A single equation multiple linear regression model is used to quantify at the industry and industry segment levels the impact of the agreement. The dependent variables are the quantities of major steel products traded between the two nations. The explanatory variables include foreign price adjusted for the exchange rate and tariff rate, domestic price, and the industrial production index. Results include calculation of price and income elasticities, which vary considerably by industry segments. The impact of free trade, as modeled, varies widely from product to product. As such it has important implications not only for government policy and employment but also for the adjustment problems faced by both the large integrated steel mill and the minimill producers.

scholarly journals The influence of rate of deformation on the tensile test with special reference to the yield point in iron and steel.

1938 ◽  
Vol 165 (923) ◽  
pp. 568-592 ◽  
Author(s):  
C. F. Elam ◽  
Henry Cort Harold Carpenter
Keyword(s):  
Tensile Test ◽  
Special Reference ◽  
Yield Point ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Iron And Steel ◽  
Plastic Distortion

The following experiments were carried out with two principal objects in view: (1) to investigate the deformation of those metals, particularly iron and steel, in which the stress-strain curve does not immediately rise at the onset of plastic distortion; (2) to determine the effect of rate of deformation on the yield and subsequent stress-strain curve. It is impossible to give an adequate summary of the literature which deals with this subject, but a bibliography is included in an appendix and some of the most important results are referred to briefly below.

The Impact of Technological Change on Incentive Provision

2009 ◽  
pp. 5-36
Author(s):  
Maurizio Lisciandra
Keyword(s):  
Technological Change ◽  
New Technology ◽  
Agency Problem ◽  
Optimal Solution ◽  
Jel Classification ◽  
High Rate ◽  
Incentive Pay ◽  
Iron And Steel ◽  
Piece Rate ◽  
The Impact

- The simple trade-off between incentive and risk, which is crucial to the agency problem, is not a sufficient explanation for the ineffectiveness of a specific output-related pay such as the contract system adopted in the US iron and steel industry during the second half of the nineteenth-century. The high rate of technological innovation along with workers' extensive bargaining power made output-related pay a sub-optimal solution. This stylised fact unveils the conflicting nature of piece-rate pay compared to fixed pay as new technology is introduced and stimulates an analysis of the interaction between technological change, bargaining powers, and payment systems which can be conducive to a better understanding of the agency problem and the use of incentive pay. Key words: Incentive Contracts, Inside Contracting, Unions, Technological Change. JEL Classification: J33, J51, N31, O33

scholarly journals THE ECONOMIC, ENERGY, AND EMISSIONS IMPACTS OF CLIMATE POLICY IN SOUTH KOREA

2019 ◽  
Vol 10 (03) ◽  
pp. 1950010 ◽  
Author(s):  
NIVEN WINCHESTER ◽  
JOHN M. REILLY
Keyword(s):  
Emissions Trading ◽  
Ghg Emissions ◽  
Consumer Welfare ◽  
Carbon Price ◽  
Trading System ◽  
Iron And Steel ◽  
Business As Usual ◽  
The Impact ◽  
Carbon Dioxide Equivalent ◽  
Climate Damages

Using an economy-wide model, we evaluate the impact of policies to meet South Korea’s Paris pledge to reduce greenhouse gas (GHG) emissions by 37% relative those under business as usual (BAU) in 2030. Simulated BAU emissions in 2030 are 840.8 million metric tons (Mt) of carbon dioxide equivalent (CO2e), indicating that economy-wide emissions should be constrained to 529.7 MtCO2e. Under South Korea’s Emissions Trading System (KETS) and fuel economy standards, a 2030 carbon price of $88/tCO2e is needed to meet this goal. Without considering benefits from avoided climate damages, these policies reduce 2030 GDP by $21.5 billion (1.0%) and consumer welfare by 8.1 billion (0.7%). Declines in sectoral production are largest for fossil-based energy sectors and chemical, rubber and plastic products, and iron and steel sectors.

scholarly journals Research on the Impact of Various Emission Reduction Policies on China’s Iron and Steel Industry Production and Economic Level under the Carbon Trading Mechanism

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1624 ◽  
Author(s):  
Ye Duan ◽  
Zenglin Han ◽  
Hailin Mu ◽  
Jun Yang ◽  
Yonghua Li
Keyword(s):  
Steel Industry ◽  
Emission Reduction ◽  
Dynamic Game ◽  
High Energy ◽  
Future Research ◽  
Carbon Trading ◽  
Iron And Steel ◽  
Economic Level ◽  
The Government ◽  
The Impact

To study the emission reduction policies’ impact on the production and economic level of the steel industry, this paper constructs a two-stage dynamic game model and analyzes various emission reduction policies’ impact on the steel industry and enterprises. New results are observed in the study: (1) With the increasing emission reduction target (15%–30%) and carbon quota trading price (12.65–137.59 Yuan), social welfare and producer surplus show an increasing trend and emission macro losses show a decreasing trend. (2) Enterprises’ reduction ranges in northwestern and southwestern regions are much higher than that of the other regions; the northeastern enterprise has the smallest reductions range. (3) When the market is balanced (0.8543–0.9320 billion tons), the steel output has decreased and the polarization in various regions has been alleviated to some extent. The model is the abstraction and assumption of reality, which makes the results have some deviations. However, these will provide references to formulate reasonable emissions reduction and production targets. In addition, the government needs to consider the whole and regional balance and carbon trading benchmark value when deciding the implementation of a single or mixed policy. Future research will be more closely linked to national policies and gradually extended to other high-energy industries.

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