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The Ohio Crankshaft Company was started a century ago in Cleveland, Ohio, by two enterprising young engineers. As their business grew, they found a way to increase the service life of their products by the use of induction-hardening technology, which they would name the TOCCO process.
Cleveland-Cliffs Inc. successfully completed the acquisition of AK Steel Holding Corp., integrating North America’s largest producer of iron-ore pellets downstream into the production of value-added steel and specialty manufactured parts for the automotive industry. The combined company will be led by Chairman, President and CEO Lourenco Goncalves. It combines mining, pelletizing, direct-reduction, EAF steelmaking, BF/BOF steelmaking, highly technologically developed finishing mills and automated manufacturing of auto parts.
This article is intended to guide the home forging enthusiast in setting up a forging shop to make knives. It is excerpted from my book on knifemaking, which was published in 2020 by Fox Chapel Publishing. Part I will take you through setting up your home forge; blade design and material selection; and making a simple forge using a propane torch as a fuel source.
The knife is one of humankind’s first tools. The first knives were made about 2.5 million years ago by battering sharp flakes from stone, oftentimes used with a wooden or bone handle.
The Brenco Bearings plant in Virginia needed to cool its freshly forged steel rolled rings faster to improve the workflow into its machine shop. The solution to the problem was an investment in a couple of robots and an enclosed cooling conveyor that lowered the temperature of the rolled rings into machining range.
Jingye Group, a Chinese steelmaker, acquired British Steel’s facilities in the U.K. and the Netherlands, a move that will secure approximately 3,200 jobs. Jingye will invest approximately $1.5 billion in the business. Initiatives include: the development of an electric-arc furnace (EAF) in Teesside; the construction of a new 250-MW power plant to serve the Scunthorpe site; investment in the rolling mills to produce high-quality steel products; the construction of a new rebar line; and enhancing the current rail mill.
Saarstahl AG successfully commissioned a new five-strand billet caster at its steel plant in Völklingen, Germany. The caster, supplied by SMS Concast, a member of SMS group, is designed for a nominal annual production of 850,000 tons and the casting of 180-mm-square billets. According to SMS Concast, the casting machine at Saarstahl is the first caster in the world designed with mechanical soft reduction (MSR) technology for a billet cross section of 180 mm (7 inches) square. It produces billets in a wide range of steel grades, including bearing steel, spring steel, cold-heading and free-cutting steels.
The R10 series of fixed infrared sensors is designed for use in OEM equipment and industrial process control and monitoring applications. All models have a temperature range of 32-932°F (0-500˚C) and feature 4-20 mA output.
Forge shops can increase productivity and reduce costs in hot-forging and heat-treatment processes using synthetic lubricants and/or protective coatings. Hard coatings cold-welded onto high-wear areas of dies or anti-oxidation coatings painted directly onto forging billets can help.
Protective coatings continue to play a major role in increasing productivity and reducing costs in hot forging and heat treatment. This paper presents details and successful case studies of three such protective coatings.
The first installment of this article covered the problem of properly cooling forged microalloyed steels. In this second and final article we discuss details on heat-transfer coefficients, experimentation, production simulation and final results enabling more extensive use of this class of steels.
The first part of this article ran in the December 2019 issue. It gave an overview of a challenge facing forgers of microalloyed steels – controlled cooling!
Accurate temperature measurements are critical to forging processes and the metallurgical properties of forged components. For a given set of specific conditions, IR temperature sensors work reliably and produce repeatable temperature measurements – but not necessarily accurate ones. Accuracy comes from properly calibrating sensors to the specific materials and applications.
Part I of this article considered the technology of measuring temperature through the infrared radiation of a heated metal mass and some of the misconceptions and inaccuracies that may be present in or about the process. This article will explore ways to improve accuracy through proper calibration and to take temperature measurements of highly reflective bodies.
The Process Heating & Cooling Show is a conference and tradeshow that will bring together industrial manufacturing and engineering professionals to learn, connect, share and explore all things related to the process heating and cooling industries.
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