Skip to main content

Manufacturing Of Wrought Iron

What is Wrought Iron ? How it is Made ? 

Wrought Iron is highly refined iron with a small amount of  slag forged out into fibers. The chemical analysis of the metal shows as much as 99 percent of Iron. The slag characteristic of wrought Iron is useful in blacksmithing operations and gives the material its peculiar fibrous structure. The non - corrosive slag constituent causes wrought iron to be resistant to progressive corrosion. Moreover, The presence of slag produces a stricture which diminishes the effect of fatigue caused by shocks and vibrations. 



It is tough , malleable , ductile and has an ultimate tensile strength of about 35 kg-f per mm2. ( 350 Newton per mm2). It cannot be melted, but at a white heat, it becomes soft enough to take any shape under the hammer, i.e., it can be forged. It admits readily of being welded. This iron has the property with being able to withstand sudden and excessive shock loads with - out permanent Injury. It rusts more quickly than cast iron but stands salt - water better. It can neither be hardened nor tempered like steel.

Bolts and nuts, chains, crane hook, railway coupling, pipe and pipe fittings, plates , sheets , bars and boilers tubes are principal form in which wrought iron is used. This is produced by two commercial methods known as 

(a) Puddling process 

(b) Aston Or Byers process 

  

Labels:

Comments

Post a Comment

Popular posts from this blog

Advantages And Disadvantages Of Air Refrigeration System :

 Advantages Of  Air Refrigeration : 1. The refrigerant used namely air is cheap and easily available. 2. There is no danger of fire or toxic effects due to leakages. 3. The weight to ton of refrigeration ratio is less as compared to other systems. Disadvantages Of Air Refrigeration : 1. The quantity of  Refrigerant used per ton of refrigeration is high as compared to other systems. 2. The COP of the system is very low. Therefore running cost is high. 3. The danger of frosting at the expander valves is more as the air contains moisture content. 
Post a Comment
Read more

SIMPLE CARBURETOR - CONSTRUCTION AND WORKING

CONSTRUCTION OF SIMPLE CARBURETOR :  The main Components of Simple Carburetor are : Float Chamber, float, nozzle, venturi, throttle valve, inlet valve, and metering jet . In the float chamber, a constant level of petrol is maintained by the float and a needle valve.  The float chamber is ventilated to atmosphere.  This is used to maintain atmospheric pressure inside the chamber. The float which is normally a metallic hollow cylinder rises and closes the inlet valve as the fuel level in the float chamber increases to certain level. The mixing chamber contains venturi, nozzle and throttle valve. The venturi tube is fitted with the inlet  manifold. This tube has a narrow opening called venturi. A nozzle is provided just below the centre of this venturi. The nozzle keeps the same level of petrol as that of the level in the float chamber. The mixing chamber has two butterfly valves.  One is to allow air into the mixing chamber known as choke valve. The other is to al...
Post a Comment
Read more

MELTING FURNACES FOR FERROUS METALS : CUPOLA AND ITS WORKING

Various types of melting furnaces are used in different foundry shops, depending upon the quantity of metal to be melted at a time, and the nature of work that is carried out in the shop.  The primary objective in cupola is to produce iron of desired composition, temperature and properties at the required rate in the most economical manner. Besides, this furnace has many distinct advantages over the other types, e.g., simplicity of operation, continuity of production, and increased output coupled with a high degree of efficiency.  Description Of a Cupola : The Cupola Furnace consists of a vertical, cylindrical steel sheet, 6 to 12 mm thick, and lined inside with acid refractory bricks or acid tamping clay. The refractory bricks or the tamping clay used consist of  silicon oxide acid (SiO2) and alumina (Al2O3). The lining is generally thicker in the lower where the temperatures encountered are higher than in the upper region. The shell is mounted either on a brick work fo...
Post a Comment
Read more