|
|
Simulation of Case Depth of Cementation Steels According to Fick��s Laws |
S R Elmi Hosseini |
Faculty of Engineering, Department of Materials Science and Engineering, University of Sistan and Baluchestan, Zahedan 9816745563, Iran |
|
|
Abstract The carburizing process is the enrichment of the depth of low carbon steels with carbon. It leads to samples with a combination of high surface hardness and high core toughness and to an impact strength that is required for many engineering parts. The material studied is a low carbon steel. The carbon content is little in this type of steel (wC=0.2%). The calculation of case depth is very important for cementation steels that are hardened in the carburizing process. The effective case depth is defined as the perpendicular distance from the surface to a place at which the hardness is HV 550. Nowadays, a great number of studies have been carried out on the simulation of effective case depth, but no studies have been conducted to determine the numerical relation between the total case depth on one hand and the carburizing time and the effective case depth on the other hand. The steel specimens were subjected to graphite powder. Then, they were heat treated at 925 �� for about 3, 5, 8 and 12 h, respectively. Then, these parts were quenched in oil. To determine the effective case depth, the microhardness test was performed on the cross-section of specimens. Plotting the case depth vs carburizing time, the required conditions for obtaining the specified case depth were determined. Also, the comparison between the case depths in numerical solution and the actual position in pack carburizing was performed.
|
Received: 20 April 2011
Published: 28 November 2012
|
|
|
|
[1] |
Da-shan Sui,*,Hai-ming Zhang,Hong-yang Zhu,Zhe Zhu,Zhen-shan Cui. Effects of process parameters on fragment and refinement of millimeter-grade coarse grains for 316LN steel during hot cogging[J]. Chinese Journal of Iron and Steel, 2017, 24(5): 529-535. |
[2] |
Nan-nan Zhang,*,Dan-yang Lin,Ya-li Li,Yue Zhang,Marie-pierre Planche,Han-lin Liao, Christian Coddet,Fu-yu Dong. In-flight particle characterization and coating formation under low pressure plasma spray condition[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 306-312. |
[3] |
Zheng CHEN,,Qi��jie ZHAI,Jie��yu ZHANG,Hong��gang ZHONG. Effects of Thermal Gradients and Rotational Flows on Grain Growth in 22 t Steel Ingots[J]. Chinese Journal of Iron and Steel, 2016, 23(9): 973-980. |
[4] |
Yan-guang CAO,Le XU,Gou-qiang ZHANG,Jie SHI,Mao-qiu WANG. Rolling Contact Fatigue Properties of SAE 8620 Steel after Case Carburizing[J]. Chinese Journal of Iron and Steel, 2016, 23(7): 711-716. |
[5] |
Zheng-wei GU,,Meng-meng L��,,Xin LI,,Hong XU,. Stretch Bending of Z-section Stainless Steel Profile[J]. Chinese Journal of Iron and Steel, 2016, 23(6): 525-530. |
[6] |
Hui ZHANG,Peng HU,,Ming-lin WANG. Mechanism and Improvement of Straight Edge Seam Defect on Hot-rolled Plate Surfaces through Use of Chamfered Slabs[J]. Chinese Journal of Iron and Steel, 2016, 23(6): 539-546. |
|
|
|
|