Today JIADE Group will give you the meaning of Stainless Steel wire drawn and different kinds of standards.Stainless steel wire, also known as stainless steel wire drawing, with stainless steel as the raw material for the production of all kinds of different sizes and models of silk products, the cross-section is generally round or flat. Common good corrosion resistance, cost-effective stainless steel wire is 304 and 316 stainless steel wire. Stainless steel wire drawing (stainless steel wires) under the action of the drawing force will coil or wire billet from the die hole of the wire drawing die to produce a small cross-section of steel wire or non-ferrous metal wire metal plasticity process. Various metals and alloys with different cross-section shapes and sizes of wire can be produced by drawing. Pulled wire, precise size, surface finish, and the use of drawing equipment and moulds are simple, easy to manufacture.
Realization of drawing
In the drawing process, the role of the drawing force acting on the cross sectional area of the drawn wire unit at the mouth of the die drawing stress σ 1. In order to make the metal in the die hole plastic deformation, drawing stress σ 1 must be greater than the deformation of the metal in the deformation zone within the die hole in the deformation resistance σ T; in order to prevent the wire out of the die hole continue to deform after the thinning or pulling and thus destabilizing the drawing process, drawing stress σ 1 must be less than out of the hole after the yield limit σ s of the drawn wire, so the conditions for the realization of the drawing process is usually expressed: σ T ＜ σ 1 ＜ σ s. The ratio of K to K to the value of the wire is the same as that of K. The yield limit of the drawn wire σs, so the conditions for the realization of the drawing process is usually expressed as: σT < σ1 < σs. to the ratio of the K and the guys is called the safety coefficient of the drawing process.
Condition
After the cold drawing of the wire produced obvious deformation hardening, its yield limit σs value close to its strength limit σb, commonly used in the production of σb value instead of σs, so the conditions to achieve the drawing process can also be expressed as σT < σ1 < σs; drawing process of the coefficient of safety K can be used to indicate the ratio of σb and σ1.
Coefficient of safety
Drawing process safety factor K value is generally between 1.40 ~ 2.0, K <1.40 indicates that the drawing stress σ1 is too large, out of the mold hole after the wire may continue to deform the phenomenon of pulling thin or pulling the phenomenon of pulling the process is not stable; K> 2.0 indicates that the pulling stress σ1 is small, the channel drawing deformation is too small, the number of drawing channel increase. In the drawing of wire diameter less than 0.05mm of ultra-fine wire, through the mold is difficult, in order to improve the stability of the drawing process, reduce the number of pull off and through the mold to improve the efficiency of drawing production, can be used with a safety factor of K value greater than 2.0.
Process characteristics
The stress state of metal wire drawing for two-way compressive stress has been tensile stress of three-way principal stress state, it is with three-way are compressive stress state compared to the principal stress state, the drawn wire is easier to achieve plastic deformation state. Drawing of the deformation state for the two-way compression deformation to a tensile deformation of the three-way main deformation state, the state of the metal material to play the plastic unfavorable, more likely to produce and expose surface defects. Stainless Steel Material Drawing process of channel deformation is limited by its safety coefficient, channel deformation is smaller is drawn more channels, therefore, in the production of metal wire is often used in multi-channel continuous high-speed drawing.
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