Conference Proceedings

Conference Proceedings

Conference Proceedings Search

Web Content Listing

Method For Testing The Fracture Splittability Of Forged Steel Connecting Rods

Published: 2014
Authors: Robert Cryderman, Danielle Rickert, Michael Burnett, John G. Speer, and David K. Matlock

Connecting rods for the latest design of internal combustion engines require progressively higher fatigue strength and an economical means for manufacture. Modem steel connecting rods are being produced as a single forging followed by fracture splitting to separate the cap from the rod. Steel composition and forging process variables have been shown to affect the fracture splitting characteristics as well as machinability and final part strength. Alloying and processing factors have continued to evolve as driven by the need for performance improvement and cost reduction.

Material Resources / Publications

Influence Of Small Deviations In Steel Chemical Composition On Hardenability

Published: 2014
Authors: Pavel Suchmann, Petr Martinek

Chemical composition of steels used for heavy-duty parts of car gearboxes is usually defined by technical standards, in which certain deviations from nominal composition are allowed. However practical experience shows that in many cases even such small deviations can significantly influence the steel's behaviour during hardening.

Material Resources / Publications

Superstrengthening Phenomenon (An Overview)

Published: 2014
Authors: Dr. Nikolai I. Kobasko

In the paper superstrengthening phenomenon is discussed which is based on self- regulated thermal process taking place during transient nucleate boiling mode. Superstrengthening means additional strengthening of a material when cooling rate within the martensite range is high enough and compressive stresses are formed at the surface of steel parts. The main attention is paid to self - regulated thermal process because it allows metallurgists to optimize superstrengthening phenomenon by maximizing density of dislocations in material and making optimal condition for precipitation of fine carbides in steels and irons.

Material Resources / Publications

Synthesis Of Fe-C Alloys By Mechanical Alloying

Published: 2014
Authors: Ahmed A. Al-Joubori and C. Suryanarayana

We present here our results on the synthesis of iron-carbon alloys (steel and cementite) starting from blended elemental iron and carbon powders. The powder particle size decreased and the lattice strain increased with increasing milling time, as determined from the width of the X-ray diffraction peaks and also confirmed by scanning electron microscopy.

Material Resources / Publications

Preparation Of No Silicon Steels With Columnar Microstructure Using Temper Rolling Process At Elevated Temperature

Published: 2014
Authors: Frantisek Kovac, Ivan Petryshynets

Non-oriented electrical steels belong to important group of the soft magnetic materials. The soft magnetic characteristics of these materials strongly rely on the ability to control the grain size and texture as well as chemistry of the final steel sheets products. In the present work, we have used an adjusted temper rolling process at elevated temperature for development columnar grain growth with enhanced rotation textures {100}<0vw> in NO steels.

Material Resources / Publications

Physical Metallurgy Behavior Of Ti Containing High Strength Steel Sheet Under Intensive Cooling

Published: 2014
Authors: PEI Xinhua, Tang Shuai

In this paper, the physical metallurgy behavior of Ti containing high strength steel sheet under intensive cooling process after hot-rolling was studied. The results show that the intensive cooling broaden the bainite transformation field. The phase transformation incubation period are shorten and the CCT curve moves to bottom left.

Material Resources / Publications

Influence Of Various Heating Rates And Ceoi Addition On The Pulverized Coal Combustion

Published: 2014
Authors: Chai Yifan, Zhang Jianliang, Qi Chenglin, Ning Xiaojun, Zheng Changle

For more details about the rule of pulverized coal combustion with CeO2 as its catalyst, this article illustrated the influence of the experiment on anthracite coal combustion under different heating rates( 5°C/min^ 10°C/mim 15°C/mim 20°C/min ) and with different addition of CeO2 (0.5%^ 1%^ 2% respectively) by thermal analysis technique.

Material Resources / Publications

Thermal Test And Heat Transfer Analysis Of Nodular Cast Iron Cooling Stave

Published: 2014
Authors: ZUO Haibin, HONG Jun, ZHANG Jianliang, SHEN Meng, TIE Jinyan

The 1:1 thermal tests are carried out, including the naked cooling stave and cooling stave with 20 mm slag skull, in order to determine the actual cooling performance of the nodular cast iron cooling stave produced by lost foam casting (LFC) process. Heat resistance analysis method is also used to calculate the integrated heat transfer coefficient between cooling water and cooling stave.

Material Resources / Publications

Optimization Of Nodular Cast Iron Stave With Elliptical Cooling Pipe

Published: 2014
Authors: Jun Hong, Hai-bi1n Zuo, Jian-liang Zhang, Meng Shen, Jin-yan

The three-dimensional steady-state heat transfer model of a cast iron cooling stave is built based on the commercial CFD software FLUENT, to calculate the temperature field of the cooling stave with circular pipe as well as elliptical pipes. Cooling effects of different kinds of elliptical pipes are analyzed. The results show that compared with a circular cross section, the elliptical cross section can increase the circumference of the cooling pipe under the same water velocity and the same cross-sectional area, thereby increasing cooling ability of the stave.

Material Resources / Publications

New Steel For Fabrication Of The Forged Forming Rolls

Published: 2014
Authors: Potapov A. A, Orlov G. A, Shestakova E. N

The article present high-carbon hypereutectoid steel for the production of hot rolling forged rolls. The steel contains 1.2 - 1.4 % carbon, carbide forming alloying elements Cr, Mo, V and Nb to improve the wear resistance of the roll, and Ni to increase the hardenability. Hot ductility of the steel has been investigated considering segregation of chemical elements in ingots weighing up to 20 tons.

Material Resources / Publications

ASM Affiliate Societies