BLOG 3- STEEL ARCHITECTURE AND DESIGN

 WELCOME BACK TO MY BLOG!

The third class was about shaping and the finishing of steel.

WAYS TO SHAPE A STEEL:

COLD HARDENING:

  • hammering and compressing the steel
  • to increase its strength and hardness

QUENCHING:

  • heating and quickly cooling the steel
  • formation of the thin crystal layer
  • makes steel strong and brittle
TEMPERING:

  • it is a controlled heating and cooling process
  • it increases the strength, hardness, and ductility.
ANNEALING:
  • heating and cooling it very slowly to make hard steel soft.
  • cold working cutting/ forming.
GALVANIZATION:
  • application of zinc coating to prevent rusting
  • two methods- hot dipped and cold/electro process.
let's compare the two methods of galvanization,
HOT DIPPED;
  • immersed in the molten zinc
  • highly durable
  • grey matte color finish
COLD/ELECTRO :
  • zinc is electrically coated
  • less durable
  • shiny surface
now that the steel is manufactured, its time for the final coating of the product to improve its appearance and to prevent corrosion.
it also becomes mandatory to make it fire-resistant.
though steel is non-combustible, it loses its strength and becomes ductile at high temperatures. during the time of the fire , this might become hazardous to living beings.

several ways had been adapted to prevent this.like,
  • enclosing the steel in the gypsum layer
  • encasing the steel in concrete
  • concealing it from its view
  • fireproof sprays
so this is all about steel in general.
now moving on to a specific type of steel - STAINLESS STEEL.
Properties:
  • highly resistant to atmospheric corrosion
  • retains its original luster
  • can be colored with bronze, blue, green, gold, red, and purple by chemical and cathodic treatment.
FINISHES FOR STAINLESS STEEL:
ELECTRO POLISHING:
the electrochemical process to decrease the surface roughness.
ACID ETCHING:
a pattern is formed by exposing certain areas to acid while a certain area is covered with resistant substance
PAINTING:
to improve visibility and aesthetic purposes.
ENAMELLING:
coated with a mixture of ceramic powder, and baked till it melts and vitrifies.
METALLIC COATING:
combining the stainless resistance of steel with the aesthetics of another metal.

so that's all people.
I'll end this blog with a question.
 
HOW WEATHER CONDITIONS AFFECT STEEL?
(will answer this question in my upcoming blog)

until then,
BYE!!!!


DIVYA RANI C R





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