Aluminum nitride buffer layer for diamond film growth

1996 ◽  
Vol 11 (7) ◽  
pp. 1810-1818 ◽  
Author(s):  
V. P. Godbole ◽  
J. Narayan
Keyword(s):  
Aluminum Nitride ◽  
Buffer Layer ◽  
Diamond Film ◽  
High Speed ◽  
Film Growth ◽  
High Speed Steel ◽  
Bearing Steel ◽  
Low Carbon ◽  
Wide Range ◽  
Steel Substrates

The role of aluminum nitride (AlN) as a buffer layer on the nucleation and growth of diamond on silicon and steel substrates during hot filament chemical vapor deposition (HF-CVD) has been investigated systematically. The scanning Auger electron microscopy (AES) is employed to study chemistry and content of carbon on the surface and in subsurface regions of AlN as a function of HF-CVD parameters. It is found that AlN offers an excellent diffusion barrier for carbon over a wide range of temperature and hydrocarbon content of CVD gas environment, with simultaneous inhibition of graphitization. It also facilitates nucleation of diamond phase. The surface reactions between AlN and carbon are discussed in terms of hydrogen-assisted phase transformations. We have developed a two-step procedure to obtain a continuous diamond film on steel substrates. The characteristic features of AlN have been exploited to obtain adherent and graphite-free diamond deposits on various types of steels, including low carbon steel, tool steel, high speed steel, and bearing steel.

Ceramic coating chemically vapour deposited on high speed steel substrates: Scratch adhesion test phenomena

1993 ◽  
Vol 20 (5) ◽  
pp. 352-356 ◽  
Author(s):  
Z. Naeem ◽  
A. B. Smith ◽  
M. Lamsehchi ◽  
G. W. Critchlow
Keyword(s):  
High Speed ◽  
Ceramic Coating ◽  
High Speed Steel ◽  
Adhesion Test ◽  
Steel Substrates

Residual Stress Analysis in Different Thickness TiN Coatings on High-Speed-Steel Substrates

2011 ◽  
Vol 239-242 ◽  
pp. 2331-2335 ◽  
Author(s):  
Fang Mei ◽  
Guang Zhou Sui ◽  
Man Feng Gong
Keyword(s):  
Residual Stresses ◽  
High Speed ◽  
Thermal Stresses ◽  
High Speed Steel ◽  
X Ray Diffraction ◽  
Tin Coatings ◽  
Compressive Stresses ◽  
M2 High Speed Steel ◽  
Steel Substrates ◽  
Different Thickness

TiN coatings were deposited on AISI M2 high-speed-steel (HSS) substrates by multi-arc ion plating technique. The thickness of substrate was 1.0 mm and five thicknesses of TiN coatings were 3.0, 5.0, 7.0, 9.0 and 11.0 μm, respectively. X-ray diffraction (XRD) has been used for measuring residual stresses. The stresses along five different directions (Ψ=0°, 20.7°, 30°, 37.8° and 45°) have been measured by recording the peak positions of TiN (220) reflection for each 2θ at different tilt angles Ψ. Residual compressive stresses present in the TiN coatings. Furthermore, the results revealed that the value of the residual stresses in TiN coatings was high. While the coatings thickness changed from 3 to 11 μm, the residual stresses varied from -3.22 to -2.04 GPa, the intrinsic stresses -1.32 to -0.14 GPa, the thermal stresses -1.86 to -1.75 GPa. The residual stresses in TiN coatings showed a nonlinear change. When the coatings thickness was about 8 μm, the residual stresses in TiN coatings reached to the maximum value.

A New Technology to Machine Bimetal Band Saw

2016 ◽  
Vol 861 ◽  
pp. 9-13
Author(s):  
Hong Jian Dong ◽  
Qin He Zhang ◽  
Lei Tan ◽  
Guo Wei Liu ◽  
Tuo Dang Guo
Keyword(s):  
Electrical Discharge ◽  
High Speed ◽  
Electrical Discharge Machining ◽  
New Technology ◽  
High Speed Steel ◽  
Processing Route ◽  
Grinding Process ◽  
Wire Electrical Discharge Machining ◽  
Low Carbon ◽  
Band Saw

As a kind of commonly used tools, junior hacksaw plays an important role in our daily life. A new kind of bimetal band saw taken low carbon medium alloy steel X32 as the backing material and the high-speed steel M42 as the saw tooth material is developed. In this paper, a new method to machine the bimetal band saw with wire electrical discharge machining (WEDM) is introduced. The processing route for common tooth profile is calculated. The fixture with specific angles is designed with CAD software (proe5.0) and machined with 3D printing technology. The experiments show that bimetal band saw machined with WEDM method has better surface quality compared with that machined through the traditional grinding process. Without any burrs, the new bimetal band saw is more resistant to wear and has a longer service life.

The Effect of Deposition Parameters on the Structural and Mechanical Properties of BN Coatings Deposited onto High-Speed Steel by the PLD Method

2015 ◽  
Vol 220-221 ◽  
pp. 737-742
Author(s):  
Krzysztof Gocman ◽  
Tadeusz Kałdoński ◽  
Waldemar Mróz ◽  
Bogusław Budner
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Rf Discharge ◽  
Internal Stresses ◽  
Force Microscopy ◽  
Gas Nitriding ◽  
Atomic Force ◽  
Deposition Parameters ◽  
Steel Substrates

Boron nitride coatings have been deposited onto high-speed steel substrates using pulsed laser deposition technique combined with RF-discharge. In order to improve adhesion and reduce internal stresses, substrates were subjected to gas nitriding. The structure and morphology of coatings were investigated applying atomic force microscopy (AFM) and FTIR spectroscopy. Nanohardness and elastic modulus were examined employing a nanoanalyzer (CETR). On the basis of the conducted experiments, stable, crystalline, multiphase coatings have been obtained. It has been proved that morphology, structure and mechanical properties strongly depend on the parameters of the PLD process; in particular, the temperature of the substrate has a crucial influence on the properties of BN coatings.

TM-6 LOW CARBON

Alloy Digest ◽  
1966 ◽  
Vol 15 (2) ◽  
Keyword(s):  
High Speed ◽  
Cold Work ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treating ◽  
Low Carbon

Abstract TM-6 LOW CARBON is a modification of Type M-2 tungsten-molybdenum high-speed steel recommended for cold work or hot work applications. It is not intended for use as cutting tools. This datasheet provides information on composition and hardness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-175. Producer or source: H. K. Porter Company Inc..

MCH

Alloy Digest ◽  
1987 ◽  
Vol 36 (3) ◽  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Medium Carbon ◽  
Die Life ◽  
Aisi Type ◽  
Hot Work Steel ◽  
Hot Work Die ◽  
Selection Of

Abstract MCH is a medium-carbon, high-molybdenum hot-work steel developed to supplement the medium-carbon, high-tungsten (AISI Type H24) hot-work type of steel. It is a modified high-speed steel that will attain hardness in excess of Rockwell C 60. Because of the careful selection of alloying elements, it will resist wash and abrasion at high operating temperatures. MCH is considerably tougher than either the low-carbon AISI Type M2 steel or the medium-carbon, high tungsten (H24) hot-work steel. MCH should not be water cooled in service. Best hot-work die life is obtained by preheating the dies prior to use. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, and machining. Filing Code: TS-471. Producer or source: Latrobe Steel Company.

Study of the Composition and Properties of Coatings being Formed during Combustion of Al + B2O3 Mixtures on Steel Substrates

2021 ◽  
Vol 1022 ◽  
pp. 87-96
Author(s):  
Alexandr Shegolev ◽  
Alexey Ishkov ◽  
Vladimir N. Malikov
Keyword(s):  
Aluminum Nitride ◽  
Aluminum Oxide ◽  
Experimental Research ◽  
High Speed ◽  
Amorphous Boron ◽  
Properties Of Coatings ◽  
Workpiece Surface ◽  
Hardening Coatings ◽  
Steel Substrates

Within the scope of this work, the methods of the experimental research of SHS processes during HFC-heating, particularly of hardening coatings applied on samples by HFC-heating have been developed. A study of the composition and properties of the products formed during the SHS process in the basic mixture on the surface of S355 steel parts during HFC-heating has been made, and it has been shown that aluminum oxide, aluminum nitride (by-product), and amorphous boron are formed under these conditions, and composite porous inhomogeneous coatings up to 250 microns thick, based on aluminum oxide, SHS products in the basic mixture and traces of high-speed HFC-boriding products are formed on the workpiece surface.

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