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.

Temperature measuring system

Abstract: In a continuous slab caster, for example, the system measures tundish molten steel temperature using tundish probe, recorder and temperature monitoring circuits having separate outputs to a temperature indicator and an industrial process controller. Monitoring circuits periodically reject errors and discontinuities in temperature traces, reject open thermocouple or burn-out conditions, and advise the probe operator by way of the indicator to accept a present good reading or take another sample. The last bonafide temperature reading is held at the output to the process controller, thereby eliminating control errors caused by errors or discontinuities in temperature traces.

Floating roof seal

Abstract: This invention relates to a floating roof for storage tanks used for storing volatile liquids, such as oil or gasoline. The general object of this invention is to provide an efficient yet simple means for closing the annular space between the tank wall and the periphery of the floating roof;...

Method of treating steel rail

Abstract: 1. A METHOD OF TREATING A ROLLED STEEL RAILROAD RAIL TO IMPROVE ITS SHELLING RESISTANCE, COMPRISING THE STEPS OF FORMING THE SAID RAIL FROM A STEEL WHOSE COMPOSITION, BY WEIGHT, COMPRISES CARBON BETWEEN ABOUT 0.64 TO 0.82%, MANGANESE UP TO ABOUT 1.50%, PHOSPHOROUS UP TO ABOUT 0.04%, SULFUR UP TO ABOUT 0.05%, SILICON UP TO ABOUT 1.25%, CHROMIUM UP TO ABOUT 2.5%, BALANCE ESSENTIALLY IRON, AT A TEMPERATURE ABOVE ABOUT 2000*F. AND RAPIDLY COOLING SAID RAIL FROM A TEMPERATURE ABOVE 1800*F. TO AT LEAST A TEMPERATURE BETWEEN ABOUT 700 TO 1000*F. AT A RATE SUFFICIENT TO PRODUCE A FULLY PEARLITIC MICROSTRUTURE AND AN AVERAGE PEARLITE SPACING OF LESS THAN ABOUT 1500 A.

Pyrometer method for measuring slab temperature in a reheat furnace

Abstract: A method and apparatus to measure the temperature of a slab in a reheat furnace with increased accuracy using either a single or dual pyrometer system through use of a multiplicity of temperature correction functions involving temperatures of slab and wall, distance between a pyrometer and the slab at which it is aimed, a ratio of air and fuel supplying the furnace heat and radiation interferences The functions are chosen by a microprocessor in the system dependent on temperature differentials, emissivity setting of the pyrometer, target distance between pyrometer and slab, and air and fuel flow rates existing and fluctuating in the system

Practice of Management Science---Orderbook Balancing Using a Combination of Linear Programming and Heuristic Techniques

Abstract: In complex manufacturing situations, when product demand exceeds the manufacturing capacity by a very wide margin, both the production planning and scheduling functions become extremely difficult and time-consuming to handle---even with modern computers and sophisticated analytical techniques. Our studies had shown that in such cases the tasks of production scheduling and detailed planning could be made easier if the orderbook were first balanced in an aggregate manner such that monthly or other periodic demands were approximately in line with the manufacturing capabilities. We applied this basic approach in the development of an improved planning tool for Bethlehem Steel's roll manufacturing operations, where approximately 4,000--6,000 cast rolls of 300 different types, each requiring an average of ten operations, are machined in a large m/n job shop each year. This planning tool, which is a hybrid computer package combining linear programming and heuristic methods, is being routinely used to balance the roll orderbook. The quick estimate of shop capacity and due-date performance provided by this package gives shop management an improved ability to negotiate roll delivery and resolve order-distribution problems with the plants. Due dates are changed and/or orders are dropped during one or more rounds of negotiations with each plant, and a balanced, or feasible, orderbook for the plants as a whole is obtained. Accurate production schedules and long-term plans are then generated by elaborate simulation models.