When metal under goes mechanical working (forging) and deformation takes place, the grains in the metal get aligned in the direction of material flow. When you cut and polish the forging in the direction of material flow and macro etch, the surface will reveal fibre like structure. This is known as grain flow.
You have to cast billets to be formed by forging. It is also possible to cast shapes prior to forging, but this often defeats the purpose of forging as the most important aspect of forging is grain flow.
Grain flow is a typical grain pattern generated during forging of metal. When a piece of metal is cold or hot forged by applying external force or pressure, then metal starts deforming normal to the direction of application of pressure. During the process of permanent deformation, metal grains get deformed & generate what is known as" flow lines ". This is called Grain Flow. It can be seen by chemically etching cross sectional piece of forge metal shown fig below.
1.Impression Die Forging 2.Cold Forging 3.Open Die Forging 4.Seamless Rolled Ring Forging hope this will help you.
Impression forging is die forging. please see the introduction from SK forging Group,If you need more info, you may visit their website on the following. www.forgingmanufacturer.comDie forging is the most widely used forging process in today's forging industry. As a large forging manufacturer in China, SK forging group has the unique advantages on die forging technology. SK Forging has 23 die forging production lines. Die forging is usually divided into open die forging and closed die forging. The size of die forgings of SK is from 50mm to 2000mm, weight is from 0.5Kg-200Kg. What is die forging? Die forging is a forging process that forging metal in plastic deformation under external force and be full of forging mold. Die forging can be divided into open die forging and closed die forging. Compared with the free forging, die forging must need a mold to forge. The mold of forging determines the size, shape and quality of products. Therefore, the mold is a very important part in die forging process. Die forging equipmentsThe equipments commonly used in die forging are die forging hammer, hot forging press, flat forging press, friction forging press and others. Features of die forging:1. Compared with the free forging, die forgings have precision size, less machining and a more reasonable distribution of fibrous tissue. All these advantages may enhance the service life of forging parts.2. Die forging with high productivity, simple operation, easy to implement mechanization and automation.3. However, die forging need much investment in equipments and long production preparation. The quality of die forging parts was restricted by the equipment press. Die forging usually applied to small and medium-sized forgings (usually
Possibly a grain of sand or debris in the flow tube.
malleability
Press forging considered as a method of forging that involves the slow and continuous application of pressure on the workpiece. This method is different from the heavy and quick blows used in drop and hammer forging. Press forging could be done either hot or cold. <a href="http://www.forging-process.com/cwr-forging-an-answer-to-hollow-valves/">cwr forging</a>
Tai Chiv Lee has written: 'Flow and filling characteristics in plane strain and axisymmetrical deformation in forging'
Forging the Sword was created in 2006.
the root word for forging is forge
Forging
Forging Ahead was created in 1982-10.