the invention of stainless steel followed a series of scientific developments. chromium metal was first shown to the french academy by vauquelin in 1798. in the early 1800s, stodart, faraday, and mallet observed the resistance of chromium-iron alloys 'chromium steels' to oxidizing agents.bunsen discovered chromium's resistance to strong acids, as well as the discovery of other metals.
a press brake is a special type of machine press that bends sheet metal into shape. a good example of the type of work a press brake can do is the backplate of a computer case. other examples include brackets, frame pieces and electronic enclosures. some press brakes have cnc controls and can form parts with accuracy to a fraction of a .
oxy-fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u.s. and oxy-fuel cutting are processes that use fuel gases or liquid fuels such as gasoline and oxygen to weld or cut metals. french engineers edmond fouché and charles picard became the first to develop oxygen- acetylene welding in 1903. pure oxygen .
the calender section of a paper machine consists of a calender and other equipment. the paper web is run between in order to further smooth it out, which also gives it a more uniform thickness. the pressure applied to the web by the rollers determines the finish of the paper, and there are three types of finish that the paper can have.
inconel alloys are oxidation- corrosion-resistant materials well suited for service in extreme environments subjected to pressure and heat. when heated, inconel forms a thick, stable, passivating oxide layer protecting the surface from further attack. inconel retains strength over a wide temperature range, attractive for high temperature .
maraging steel production, import and export by certain states, such as the united states, is closely monitored by international authorities because it is particularly suited for use in gas centrifuges for uranium enrichment; lack of maraging steel significantly hampers this process. older centrifuges used aluminum tubes; modern ones, carbon .