Special alloy steels as applied to chemical engineering

1932 ◽  
Vol 51 (25) ◽  
pp. 527-531
Author(s):  
T. G. Elliot ◽  
R. J. Sarjant ◽  
W. Cullen
Keyword(s):  
Chemical Engineering ◽  
Special Alloy Steels ◽  
Special Alloy ◽  
Alloy Steels

Special alloy steels as applied to chemical engineering

1932 ◽  
Vol 51 (24) ◽  
pp. 502-520
Author(s):  
T. G. Elliot ◽  
R. J. Sarjant ◽  
W. Cullen
Keyword(s):  
Chemical Engineering ◽  
Special Alloy Steels ◽  
Special Alloy ◽  
Alloy Steels

High-Pressure Plant for Experimental Hydrogenation Processes

1934 ◽  
Vol 128 (1) ◽  
pp. 5-75 ◽  
Author(s):  
A. T. Barber ◽  
A. H. Taylor
Keyword(s):  
High Pressure ◽  
Experimental Plant ◽  
Hydrogen Attack ◽  
Special Alloy Steels ◽  
Special Alloy ◽  
Continuous Plant ◽  
Complete Disintegration ◽  
Alloy Steels ◽  
Higher Temperature ◽  
Pressure Plant

The paper gives an account of some of the mechanical difficulties experienced in the development and operation of experimental plant for the hydrogenation of coal and tar for the production of motor spirit. Particulars of the various stages of progress are given, from small autoclaves up to a continuous plant capable of producing up to 300 gallons of spirit per day. The pressure plant is operated at 3,000 to 6,000 lb. per sq. in., and at temperatures up to 950 deg. F. Hydrogen produces complete disintegration of the structure of mild steel under the higher temperature conditions. The use of special alloy steels reduces the liability to hydrogen attack, giving longer working life and allowing higher working pressures, but satisfactory service can best be obtained by insulating the pressure-resisting walls from the heating medium so as to avoid heating the metal beyond 200 deg. F. Various methods of making suitable joints for high-pressure pipes and cylinders are described, and the results of microscopic examination of sections of cylinders are given in Appendixes.

Determination of Vanadium in Special Alloy Steels

1932 ◽  
Vol 4 (2) ◽  
pp. 187-190 ◽  
Author(s):  
Hobart H. Willard ◽  
Philena Young
Keyword(s):  
Special Alloy Steels ◽  
Special Alloy ◽  
Alloy Steels

PYROLYSIS OF THE LOWER PARAFFINS: III. PRODUCTION OF OLEFINES IN BAFFLED METAL TUBES

1933 ◽  
Vol 9 (6) ◽  
pp. 583-590 ◽  
Author(s):  
Adrien Cambron ◽  
Colin H. Bayley
Keyword(s):  
Thermal Treatment ◽  
Alloy Steel ◽  
Steel Tubes ◽  
Heat Resistant ◽  
Special Alloy Steels ◽  
Special Alloy ◽  
Alloy Steels ◽  
Elementary Carbon

Results have been obtained which indicate that the conversion of the lower paraffins to olefines by thermal treatment can be satisfactorily carried out in special alloy steel tubes at 800–820 °C. By using baffled tubes it has been found possible to obtain high rates of conversion at temperatures considerably lower than when using open tubes. Actually the temperature has been brought within the range of usefulness of special alloy steels. Heat-resistant alloys of the 18–8 type have been found unsuitable for this purpose, because nickel appears to catalyze the formation of elementary carbon, but nickel-free alloys containing over 20% of chromium have been found satisfactory.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

EELS characterization of “Smut” layer films on steel surface prepared for chrome plating by anodic etching

1995 ◽  
Vol 53 ◽  
pp. 538-539
Author(s):  
E Y. Wang ◽  
J. T. Cherian ◽  
A. Madsen ◽  
R. M. Fisher
Keyword(s):  
Steel Surface ◽  
Surface Preparation ◽  
Treatment Method ◽  
Chrome Plating ◽  
Transmission Electron ◽  
Alloy Steels ◽  
Pre Treatment ◽  
Hard Chrome ◽  
Electron Energy Loss

Many steel parts are electro-plated with chromium to protect them against corrosion and to improve their wear-resistance. Good adhesion of the chrome plate to the steel surface, which is essential for long term durability of the part, is extremely dependent on surface preparation prior to plating. Recently, McDonnell Douglas developed a new pre-treatment method for chrome plating in which the steel is anodically etched in a sulfuric acid and hydrofluoric acid solution. On carbon steel surfaces, this anodic pre-treatment produces a dark, loosely adhering material that is commonly called the “smut” layer. On stainless steels and nickel alloys, the surface is only darkened by the anodic pre-treatment and little residue is produced. Anodic pre-treatment prior to hard chrome plating results in much better adherence to both carbon and alloy steels.We have characterized the anodic pre-treated steel surface and the resulting “smut” layer using various techniques including electron spectroscopy for chemical analysis (ESCA) on bulk samples and transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) on stripped films.

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