Accurate reconstruction of the thermal conductivity depth profile in case hardened steel

2010 ◽  
Vol 107 (8) ◽  
pp. 083519 ◽  
Author(s):  
Ricardo Celorrio ◽  
Estibaliz Apiñaniz ◽  
Arantza Mendioroz ◽  
Agustín Salazar ◽  
Andreas Mandelis
Keyword(s):  
Thermal Conductivity ◽  
Depth Profile ◽  
Hardened Steel ◽  
Accurate Reconstruction

Reconstruction of radial thermal conductivity depth profile in case hardened steel rods

2009 ◽  
Vol 105 (8) ◽  
pp. 083517 ◽  
Author(s):  
Ricardo Celorrio ◽  
Arantza Mendioroz ◽  
Estibaliz Apiñaniz ◽  
Agustín Salazar ◽  
Chinhua Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Depth Profile ◽  
Hardened Steel

Trial on C3N4 Coating Cutter Hard-Dry Cutting on Hardened Steel

2010 ◽  
Vol 33 ◽  
pp. 483-486
Author(s):  
Hai Dong Yang ◽  
Xi Quan Xia ◽  
Zhen Hua Qing
Keyword(s):  
Thermal Conductivity ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Tool Material ◽  
High Hardness ◽  
Hardened Steel ◽  
Hard Material ◽  
Low Friction ◽  
Dry Cutting ◽  
Coated Tool

The method of “cutting instead of grinding” on hardened steel is always attractive to engineers. To gain this aim the tool material must first be found. C3N4 is a new kind of super hard material and has comparable properties with diamond in high hardness, wear-resistance, low friction coefficient and thermal conductivity. A number of dry-cutting tests were carried out by C3N4-film coated tool on hardened steel, proved the coating tool is suitable for hard dry cutting.

Depth profile reconstruction of the thermal conductivity of inhomogeneous solids: application to laser-hardened Al alloys

2000 ◽  
Vol 71 (3) ◽  
pp. 319-323 ◽  
Author(s):  
Y.Z. Zhao ◽  
S.Y. Zhang ◽  
J.C. Cheng ◽  
Y.K. Zhang ◽  
W.H. Xu
Keyword(s):  
Thermal Conductivity ◽  
Depth Profile ◽  
Al Alloys ◽  
Profile Reconstruction

Cutting Tool Edge Temperature in Finish Hard Turning of Case Hardened Steel

2009 ◽  
Vol 407-408 ◽  
pp. 538-541 ◽  
Author(s):  
Ryutaro Tanaka ◽  
Hiroki Morishita ◽  
Yong Chuan Lin ◽  
Akira Hosokawa ◽  
Takashi Ueda ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
White Layer ◽  
Cutting Speed ◽  
Hardened Steel ◽  
Cutting Test ◽  
Tool Edge ◽  
Cutting Insert ◽  
Finish Hard Turning ◽  
Lower Tool ◽  
Edge Temperature

This study deals with the influence of tool characteristics on the cutting edge temperature in turning case hardened steel. The cutting test is undertaken with the inserts which have different thermal conductivity and coating layer. The tool edge temperature is measured with a two-color pyrometer. The tool edge temperature increases with the increase in cutting speed. The higher thermal conductivity cutting insert causes lower tool edge temperature. The coating hardly affects the tool edge temperature. The white layer thickness increases with increasing cutting speed reaching a maximum at certain cutting speed and decreases with cutting speed.

Microstructure of mechanically alloyed and hot-pressed Al5CuZr2

1990 ◽  
Vol 48 (4) ◽  
pp. 970-971
Author(s):  
T. E. Mitchell ◽  
P. B. Desch ◽  
R. B. Schwarz
Keyword(s):  
Mechanical Alloying ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Rapid Quenching ◽  
Hardened Steel ◽  
Alloyed Powder ◽  
Ion Milling ◽  
Mechanical Grinding ◽  
Mechanically Alloyed ◽  
Steel Container

Al3Zr has the highest melting temperature (1580°C) among the tri-aluminide intermetal1ics. When prepared by casting, Al3Zr forms in the tetragonal DO23 structure but by rapid quenching or by mechanical alloying (MA) it can also be prepared in the metastable cubic L12 structure. The L12 structure can be stabilized to at least 1300°C by the addition of copper and other elements. We report a TEM study of the microstructure of bulk Al5CuZr2 prepared by hot pressing mechanically alloyed powder.MA was performed in a Spex 800 mixer using a hardened steel container and balls and adding hexane as a surfactant. Between 1.4 and 2.4 wt.% of the hexane decomposed during MA and was incorporated into the alloy. The mechanically alloyed powders were degassed in vacuum at 900°C. They were compacted in a ram press at 900°C into fully dense samples having Vickers hardness of 1025. TEM specimens were prepared by mechanical grinding followed by ion milling at 120 K. TEM was performed on a Philips CM30 at 300kV.

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