Difference between Hot rolling and Cold rolling

 

Comparison Chart

Hot RollingCold Rolling
Metal is fed into the rolls after being heated above the recrystallization temperature.Metal is fed into the rolls when its temperature is below the recrystallization temperature.
Hot rolled metal does not show a work hardening effect.Cold rolled metal hardening effect.
Coefficient of friction between the rolls and stock is higher.Coefficient of friction between rolls and stock is relatively lower.
The heavy reduction in cross-sectional area is possible.A heavy reduction in area is not possible.
Close dimensional tolerances cannot be obtained.Section dimensions can be finished to close tolerances
Very thin obtained.Aluminum foils up to 0.02 mm can be made.
Poor surface finish with a scale on it.The smooth and oxide-free surface can be obtained
Roll radius is larger.Roll radius is smaller.

Comments

Post a Comment

Popular posts from this blog

CMM (Coordinate Measuring Machine)

Image
  CMM (Coordinate Measuring Machine) Include Discontinued Series Product Lineup Handheld Probe Coordinate Measuring Machine  XM series The XM Series is a handheld coordinate measuring machine (CMM) that lets anyone easily measure 3D/GD&T features. The system is portable and shop-floor ready, so measurements can be taken in any location. The unit also automatically records measurement data and creates detailed inspection reports. The images showcases our latest XM-5000 model which allows high-accuracy measurement for palm-sized parts to large applications. Wide Area Coordinate Measuring Machine WM series The WM Series Coordinate Measuring Machine is a new handheld CMM designed accurate 3D and GD&T measurements over a large 15m (49 ft) area. Similar to the XM Series, the unit is portable and shop-floor ready, so measurements can be taken in any location including in the machine tool. The unit also automatically records measurement data and creates detailed inspection rep...
Read more

EV Charging station Market Analysis

 EV Charging station Market Analysis In the first phase of Electric Vehicles (EV) rollout plan, the power ministry is targetting 4 billion-plus population cities under the EV policy initiative. It plans to cover all the state capitals, union territories, major highways and key cities under the second phase. The electric vehicle charging infrastructure market in India is anticipated to grow at a CAGR of over 40% during the forecast period 2019-2025. Increasing government support is one of the major factors driving the electric vehicle charging infrastructure market in India. Based on component, the electric vehicle charging infrastructure marketing India is segmented into hardware and software & services. Hardware comprises sockets, cables, and charging units. Software & services include installation and maintenance of charging units, platform as a service, and other services. Other services include battery delivery service and towing service, which are in a very nascent sta...
Read more

Cochran Boiler

Image
  Cochran Boiler:  Definition, Parts or Construction, Working Principle, Advantages, Disadvantages, Application Cochran Boiler is a simple  fire tube boiler  with multiple fire tubes. It is a modification of a simple vertical boiler. In the Cochran boiler, the heating surface is replaced with multiple fire tubes that’s why it is the modification of Simple Vertical Boiler. Cochran boiler has greater efficiency comparatively Simple vertical boiler. Here in this article, we are going to study  Definition, Parts or Construction, Working Principle, Advantages, Disadvantages, and Application in very detail. Cochran Boiler Definition: Cochran boiler is a fire tube boiler (Fire inside the boiler and water surrounding them) in which coal or gases as a working fluid is used, for generating the steam,   and that steam is   further used for several purposes. Now comes to the construction, Cochran Boiler Parts or Construction: Cochran Boiler consists of the followi...
Read more