Brass is a metallic alloy made of copper and zinc. Brass is commonly used for decoration, in musical instruments as well as fittings, casings, valves, doorknobs and electrical applications.
This paper presents the effect of cold rolling and annealing on the microstructure of Brass Cu -Zn alloy and mechanical properties of brass after cold ro lling and heat treatment is determined.
In this investigation brass was used in the form of a flat bar with the dimensions 23x60x mm. The brass is first subjected to cold rolling By research and investigations it is known to us that all the properties of a metal that are dependent on the lattice structure are affected by cold working.
During cold working, the gap between yield and tensile strength decreases because yield strength increases more rapidly than the tensile strength.
This gap is required in certain forming operations where appreciable deformat ion is required. If the gap between yield and tensile strength is low then very close control of the load is required otherwise facture can occur during service condition This metallurgical problem can be solved by proper annealing.
By proper annealing the effects of cold working such as increase in hardness and strength etc can be kept control to the desired range. The mechanical properties of brass depend main ly on the content of zinc and the degree of deformat ion in the course of the production, but also on the parameters of heat treat ment, particularly the temperature of recrystallization.
The investigatio ns concern the influence of the parameters of recrystallization annealing on the microstructure and mechanical properties of the brass CuZn30, cold-deformed in the course of rolling. M icrostructure of brass before cold rolling.
Grains at normal position Fig: The microstructure of brass after cold-rolling. After cold-ro lling with reductions of In the region of intersection of these bands the microhardness amounts to HV.
The microstructure of brass after cold-rolling and recrystallization. It is also noted that yield strength is decreasing more rapidly than the tensile s trength therefore the gap between yield strength and tensile strength is increased or simply ductility is increased.
The large gap indicates that metal has good toughness while s mall gap indicates that metal has brittleness.
During cold working the gap between yield and tensile strength becomes narrow therefore me tal beco mes hard and brittle and loses its toughness this metallurgical problem can be solved by proper annealing.
Introduction to Physical metallurgy by Sidney H Avner. Materials Science and Engineering by William D.
Journal of Achievements in Materials and Manufacturing Eng ineering volu me Manufacturer and Exporter of Brass Wires, Brass Flat Wire, Square Brass Wire, Customised Brass Wires, Brass Extrusion, Brass Brazing Wire and Nickel Silver Wire offered by Shree Extrusions Limited, Jamnagar, Gujarat, India.
Combination Rolling Mill This is a new combination rolling mill with 5 rollers.
This is a well made rolling mill used for rolling out silver, gold, etc. into wire or sheet. Hot and Cold Rolling Explained To those on the outside, the rolling process is an unknown. The average person may be completely unaware of what rolling is, but it is something that is extremely important to know in the steel industry.
Steel sheets are conventionally manufactured by continuous casting, hot rolling, cold rolling and annealing.
However, recent progress in producing steel sheets in pilot-scale twin roll strip casters has stimulated efforts to convert such . (Brass is a good example of this where the small percentage of zinc makes the brass stronger than either copper or zinc.) STRAIN HARDENING Cold working or work hardening generates many dislocations which pile up and entangle this will prevent the further movement of dislocations.
Customers often ask us about the differences between hot rolled steel and cold rolled ph-vs.com are some fundamental differences between these two types of ph-vs.com differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill, and not the product specification or grade.