Non magnetic steel forging is a method of processing and shaping non-magnetic steel materials using forging technology.Non magnetic steel itself has the characteristics of low magnetism or non magnetism.During the forging process,external force is applied to cause plastic deformation of the non-magnetic steel billet,thereby obtaining the desired shape and size of non-magnetic steel forgings.

　　Firstly,suitable non-magnetic steel raw materials should be selected,and the grade and specifications of non-magnetic steel should be determined based on the performance requirements of the required forgings.For example,for some non-magnetic steel forgings used in high-precision instruments and equipment,high-purity and stable non-magnetic steel billets may need to be selected.The billet usually exists in the form of ingots,bars,or plates.

　　Before forging,it is necessary to inspect the billet to check its surface quality for defects such as cracks,inclusions,etc.At the same time,it is also necessary to verify whether the chemical composition and physical properties of the billet meet the forging requirements.

　　The non-magnetic steel billet needs to be heated to the appropriate forging temperature range.The forging temperature of non-magnetic steel of different grades varies.Generally speaking,the heating temperature is usually around 1000-1200℃.This is because at appropriate high temperatures,the plasticity of non-magnetic steel will significantly increase,thereby reducing the external force required during forging and making the billet more prone to deformation.

　　Heating speed is also crucial,as too fast a heating speed may result in a large temperature difference between the inside and outside of the billet,causing thermal stress and leading to defects such as cracks.At the same time,it is necessary to ensure that the temperature of the billet is maintained within an appropriate range during the forging process.For some large or complex non-magnetic steel forgings,it may be necessary to use equipment such as heating furnaces to maintain the billet temperature.

　　The main forging methods include free forging and die forging.

　　Free forging:In the process of free forging,the non-magnetic steel billet is gradually deformed by applying impact force or pressure using forging hammers or hydraulic presses and other equipment.For example,for some non-magnetic steel shaft forgings with simple shapes and large sizes,free forging can be used.Forging workers use pliers and other tools to manipulate the billet,gradually forging it into the desired shape through multiple hammering or pressing according to the predetermined size and shape requirements.

　　Forging:If it is necessary to forge non-magnetic steel forgings with complex shapes and high dimensional accuracy requirements,such as non-magnetic steel gears,forging can be used.Forging is the process of placing a heated billet in a mold cavity with a specific shape,applying pressure through a press to cause plastic deformation of the billet under the constraint of the mold,thereby obtaining a forging with the same shape as the mold cavity.Forging can effectively improve the production efficiency and dimensional accuracy of forgings.

　　During the forging process,it is necessary to control the forging ratio.The forging ratio is an indicator of the degree of deformation of the billet during the forging process.An appropriate forging ratio can improve the internal structure of non-magnetic steel forgings and enhance their mechanical properties.Generally speaking,non-magnetic steel forging is more suitable between 3-5.