University of Cambridge

Rail moving points

H. K. D. H. Bhadeshia


The French high-speed rail authorities have mandated that moving points must be made from the carbide-free bainitic steel. Here I took some pictures at the Cambridge rail station to use in a book that I am writing, to explain how these points work.



Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
I asked a guard and he explained that the pistons controlling the points are driven by signals from the control room. IN the old days, the points would be moved manually by levers installed in the vicinity.		 Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
Cambridge railway station, early morning
Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
Many different views so that I can figure out the mechanism		 Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
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Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
The purpose of course, is to allow trains to change to an adjacent eventually parallel track.		 Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
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Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
III		 Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
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Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
III		 Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
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Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
On the way to the Department in Cambridge, beautiful day. The trees have now grown nicely since they were first planted during the construction of our building.		 Harry Bhadeshia, University of Cambridge, Queen Mary University of London, rails, moving points on rails, carbide-free bainite, French TGV, high-speed rail
Lovely




4th edition

4th edition, 2017		 3rd edition

Free download		 1st edition

Free download		 Innovations in everyday engineering materials

Available		 Theory of transformations in steels

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