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What is a rolling mill?
In metalworking, rolling is a metal forming process in which metal stock is passed through a pair of rolls. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is termed as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is termed as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process and cold rolling processes the most tonnage out of all cold working processes
What is the difference between smithy and forging?
Smithying is defined to handle relatively small jobs only such as those that can be heated in hearth or open fire, and the work is carried out by using of hand hammers or small power hammers. Forging refers to the production of those jobs which must be heated in a closed furnace. The part of job where forging is done is termed as a forge. The work is normally performed by means of heavy hammers, forging machines, presses etc.
Define bite angle in rolling mill?
what is bite angle in rolling mill
What modern method of steel manufacturer bypasses the ingot stage and produces slabs or blooms directly?
Strand casting, a second procedure that bypasses ingot teeming, stripping, soaking and rolling in roughing mills.Modern Material and Manufacturing ProcessesR Gregg Bruce . William K.Dalton . John E. Neely . Richard R. KibbeSecond Custom Edition
Yield strength of mild steel?
There is not a straight forward answer to this question. Basically the strengths of mild steels depends on its material composition. All steels are made with varying alloys and are made from different processes eg. casting, hot or cold rolling and they all have a different effect on its strength. If you know the specifications of the mild steel you are using there are tables for which you can obtain these values. Typically I have seen the yield stress vary from 250 MPa to as much as 550MPa, so you can have an idea of just how much they vary based on their composition.
What is special forming processes?
Special forming processes are manufacturing techniques that involve the shaping of materials into specific shapes or products using specialized equipment. These processes are used for materials that are difficult or costly to shape using conventional forming methods, such as casting or machining. Examples of special forming processes include extrusion, forging, rolling, and stamping.
What is production metallurgy?
Production metallurgy is the branch of metallurgical engineering that focuses on the processes involved in transforming raw materials into useful metal products. This includes refining, casting, rolling, forging, and heat treating metals to improve their properties for specific applications. The goal of production metallurgy is to optimize the manufacturing processes to ensure high-quality and cost-effective metal products.
What are the process involved in metallurgy?
Metallurgy involves several processes, such as mining and extraction of ores, crushing and grinding of the ore, concentrating the ore through physical or chemical methods, and finally refining and purifying the metal through various techniques like smelting, electrolysis, or thermal processes. The extracted metal is then shaped into usable products through casting, molding, rolling, or forging.
What is the differences between products made of sheet metal and those made by casting and forging?
The material can be similar however the process defines the grain structure and physical properties of the metal. Forging shapes hot metal by compressive force, casting is performed by pouring molten material into a molded shape and sheet metal is produced by rolling through presses until the desired thickness is achieved. The desired end result determines the process utilized. Extruding is also a process to produce a different result.
Why is it important for steel to go through a fluid phase?
Steel is heated to a fluid phase to facilitate shaping and forming processes like casting, forging, and rolling. This allows for complex shapes and structures to be easily created from molten steel. Additionally, the fluid phase helps remove impurities and homogenize the alloy composition for improved mechanical properties.
What is a billet?
A billet is a short, thick piece of material (usually metal) that is used as a starting material for various manufacturing processes, such as forging, extrusion, or machining. It is typically produced by casting or rolling processes to achieve the desired shape and size for further processing.
Can the shape of metals be easily changed?
Yes, metals can be easily reshaped through processes such as forging, rolling, or extruding due to their malleability and ductility. These properties allow metals to be formed into various shapes without breaking.
What is the preferred method of returning the volleyball after a serve?
rolling the ball under the net
What is a rolling mill?
In metalworking, rolling is a metal forming process in which metal stock is passed through a pair of rolls. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is termed as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is termed as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process and cold rolling processes the most tonnage out of all cold working processes
Why does cold rolling decreases hardness?
Cold rolling involves application of load due to this the grains are elongated...so the material is work hardened and causes to rise internal stresses in the material...due to these stress cold rolling decreases hardness....so after cold rolling a heat treatment process is preferred...
What are the types of shaping deforming techniques used to manipulate metal?
Some common shaping and deforming techniques used to manipulate metal include forging, casting, rolling, and extrusion. Forging involves shaping metal by hammering or pressing, while casting involves pouring molten metal into a mold. Rolling is a process where metal is passed through rollers to reduce thickness or achieve a specific shape, and extrusion involves forcing metal through a shaped die to create a consistent cross-section.
How does extrusion differ from forging?
Extrusion involves pushing a material through a die to create a desired shape, while forging involves shaping material by applying compressive forces with a hammer or press. Extrusion typically produces consistent cross-sectional shapes, while forging can produce complex shapes with varying grain structures. Extrusion is better for producing long, uniform parts, while forging is ideal for producing strong, high-strength components.
