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.

Process for improving batch annealed strip surface quality

Abstract: A process is described for eliminating surface discoloration of batch annealed steel products, where said discoloration has been described as graphite staining. Said process is characterized by an annealing step which includes the introduction of a small quantity of CO2 to the annealing atmosphere comprising hydrogen and nitrogen.

Halogen tin electrodeposition bath sludge treatment

Abstract: A process for the extraction and recovery of hydrated stannic oxide and alkali metal ferrocyanide from the sludge formed in a halogen tin electrodeposition bath is described. The process comprises dissolving the ferrocyanide compounds and the tetravalent tin compounds present in the sludge in an alkaline medium, removing any insoluble materials, precipitating hydrated stannic oxide from the solution by neutralization of the solution, and separating the hydrated stannic oxide from the solution which then contains ferrocyanide ion together with acid and base counterions.

Electro-optical gaging system

Abstract: Computerized electro-optical system gages dimension of a moving hot bar. Back-lighted electronic camera head generates high-speed bar shadow pulses which represent the bar dimensions. Bar pulses are processed by way of camera electronics and a digital computer. CRT and printing terminals, interacting with the computer, indicate and/or record cold-size bar diameter measurement, with respect to commercial tolerance references and a gaging system histogram. Camera head electronics includes camera AGC circuit, a digital type one-axis bidirectional linear sweep, bar pulse edge-detection with an autocorrelator to remove noise and enhance the bar pulse, and a digital accumulator of digital bar size signals and digital bar position-in-field-of-view signals. The digital computer assimilates bar size and bar position signals bar temperature, aim size, and other data signals. The computer is programmed to: (a) compensate bar size signal for field-of-view errors and other optical and electronic nonlinearities, bar temperature and other sources of error; (b) calibrate the gage off-line and automatically recalibrate the gage on-line to correct for drift and slope errors; (c) perform a gaging system histogram; and (d) communicate with the CRT and printing terminals and an exterior control system.

Mechanism of Formation of Non-metallic Inclusions in Aluminium-killed Steels

Abstract: An investigation was undertaken 011 the deoxidation oJ molten iron contaillillg varyillg amounts oJ manganese by alumillium. Electron microprobe studies confirmed that, in such melts, duplex illclusiolls such as hercynite (FeO.AI,Oa) or galaxite (MnO· AI,O a) both enveloped with alumina are Jormed Ollly when the dissolved oxy gen contell t is well above that normally Joulld in low carbon steels prior to tappillg. Since these complex oxides are metastable in p resence oJ aluminium, their reduction to alum ilia occurs with slifjicient holdillg time. T his leads to the conclusion that a possible mechallism Jor the Jormatioll oJ spillel-(ype inclusiolls in steel is associa ted with reoxida tion oJ steel leading to highly localized regions oJ oxygen.