Bethlehem Steel

About: Bethlehem Steel is a based out in . It is known for research contribution in the topics: Coating & Corrosion. The organization has 1529 authors who have published 1559 publications receiving 19098 citations. The organization is also known as: Bethlehem Steel Corporation.

Effects of austenite grain size and cooling rate on Widmanstätten ferrite formation in low-alloy steels

Abstract: Deformation dilatometry is used to simulate the hot rolling of 0.20 pct C-1.10 pct Mn steels over a product thickness range of 6 to 170 mm. In addition to a base steel, steels with additions of 0.02 pct Ti, 0.06 pct V, or 0.02 pct Nb are included in the study. The transformation behavior of each steel is explored for three different austenite grain sizes, nominally 30, 55, and 100 µm. In general, the volume fraction of WidmanstAtten ferrite increases in all four steels with increasing austenite grain size and cooling rate, with austenite grain size having the more significant effect. The Nb steel has the lowest transformation temperature range and the greatest propensity for WidmanstAtten ferrite formation, while the amount of WidmanstAtten ferrite is minimized in the Ti steel (as a result of intragranular nucleation of polygonal ferrite on coarse TiN particles). The data emphasize the importance of a refined austenite grain size in minimizing the formation of a coarse WidmanstAtten structure. With a sufficiently fine prior austenite grain size (e.g., ≤30 µm), significant amounts of WidmanstAtten structure can be avoided, even in a Nb-alloyed steel.

Method and apparatus for detecting radioactive contamination in steel scrap

Abstract: A method of monitoring for radioactive contamination of scrap contained in a railroad car comprises the steps of detecting the presence of a moving railroad car The railroad car is scanned for radioactive contamination upon being detected, and scanning continues thereafter The identification of the railroad car is then determined by an RFID system The scintillator scanning for radiation is deactivated when the vehicle is no longer detected Once scanning is completed, then a determination is made whether the scanned vehicle is contaminated with radiation, and an indication that the vehicle is contaminated is made in that event

An oriented, semi-crystalline polymer product and method and apparatus for producing such product

Abstract: A thick-walled, seamless, rigid non-porous conduit (Y) having a substantially uniform wall thikkness which is not less than about 0.5 percent of the outside diameter consisting essentially of an oriented crystalline thermoplastic polymer characterized by a structure comprised of radially compressed discrete, platelet-like spherulitic crystalline aggregates (A!) and having a combination of good ultimate tensile strength and low temperature tensile impact strength. The conduit is fabricated by solid state hydrostatic extrusion of a substantially non-oriented semi-crystalline thermoplastic polymer preform (X) which may contain up to about60 weight percent filler. The polymer is substantially simultaneously elongated in both circumferential and axial directions by compressive forces with the circumferential elongation being at least 100 percent. The apparatus used to produce the product is a hydrostatic extrusion press which includes an annular orifice in which the thermoplastic polymer is elongated substantially simultaneously circumferentially and axially with the circumferential elongation being at least 100 percent. Means for maintaining the rigidity of tooling and the hydrostatic extrusion fluid pressure while providing a film of the fluid on the preform for lubricity are provided in the apparatus. A sheet (F) substantially uniform in thickness and having substantially the microstructure and properties of the conduit and excellent drawability may be made from the conduit by slitting and heat deformation. Articles of manufacture may be made by solid state deformation processing of the conduit or the sheet, such as vacuum drawing.

Corrosion resistant aluminum-zinc coating and method of making

Abstract: ALUMINUM-ZINC COATED FERROUS PRODUCTS WHICH ARE PARTICULARLY RESISTANT TO CORROSIVE FLAKING SUCH AS MAY OCCUR IN EXTREMELY CORROSIVE ENVIRONMENTS ARE PROVIDED BY ACCELERATED COOLING OF THE COATING ON THE PRODUCT AS IT EMERGES FROM A COATING BATH CONTAINING MOLTEM ZINC AND ALUMINUM. THE COOLING IS ACCOMPLISHED AT A MINIMUM RATE OF COOLING WHICH WILL PREVENT LATER CORROSION FLAKING OF THE COATING.