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.

Linearity correction system for electro-optical gage

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 a field-of-view correction map and a cold-size bar diameter measurement. Camera head electronics includes camera AGC, 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 along with bar temperature, aim size, and other data signals. The computer is programmed to: (a) compensate bar size signals 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 (c) communicate with the CRT and printing terminals and an exterior control system.

Relation between manganese oxide inclusions and microstructure of low-carbon rimmed steel sheet

Abstract: The influence of manganese oxide inclusions on the microstructure of cold-rolled low-carbon rimmed steel sheet containing 030 pct Mn and a high level of oxygen was studied in the laboratory by annealing full-hard samples in the 1200‡ to 1400‡F range Microprobe results showed that the oxide inclusions deplete the surrounding matrix of its manganese and thereby permit sulfur to remain in solid solution after prior hot rolling It was found that the dissolved sulfur precipitates during subsequent annealing after cold rolling and produces bands of fine grains in the inclusion area It was determined that the manganese oxide inclusions, which are generally concentrated toward the center of the sheet cross section, establish a gradient of manganese in solid solution between the surface and center of the steel samples studied As demonstrated by the electron microprobe and photomicrographic evidence, this manganese gradient caused carbon to diffuse to the sheet surfaces during annealing The resulting size, shape, and distribution of carbides at the sheet surfaces depended largely on the annealing treatment

Austenite recrystallization in Nb/V microalloyed steels

Abstract: Two Nb microalloyed steels containing 0.05 and 0.20 wt pct V were used in this study. The chemistries of these steels are shown in Table 1. The steels were vacuum induction melted as 136 kg ingots and hot rolled to a thickness of 1.0 cm. Specimens 2.5 cm x 7.6 cm were cut from the plates, retaining the original rolling direction, and thermocouple holes were drilled into the longitudinal faces of these specimens at mid-thickness. The specimens were reheated for 1 hour in an endothermic atmosphere at 1288/sup 0/C. Upon removal of the specimens from the reheat furnace, a sheathed thermocouple was inserted into the drilled hole. The temperature of the specimens was then monitored during air cooling until the desired rolling temperature of 954/sup 0/C was reached, at which time the specimens were deformed 50 pct in a rolling mill at an average strain rate of 10.2 s/sup -1/. Immediately after rolling, the specimens were transferred to a molten chloride salt bath and held for 10, 100, 1000, or 10,000 seconds at 843/sup 0/C, 954/sup 0/C, or 1066/sup 0/C, followed by brine quenching.