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Henan Friend Metal Products Co.,Ltd

Overview Of Alloy Steel Wire

Alloy structural steel a lot of steel, but basically can be divided into two categories, namely pearlite and bainite, and the former majority. Finished silk diameter of about 2 ~ 10mm, cold and heat treatment of two delivery status.

Alloy structural steel wire is generally used to make components, so it requires a specified size tolerance, surface quality, intrinsic quality and processing performance, in which the surface quality will directly affect the component manufacturing process of the finished product and component life. The low magnification of steel and the content of non-metallic inclusions should meet the requirements. According to the need for carbon content of 0.3% of the steel wire to test decarburization layer. Alloy steel wire heat treatment, the pearlitic steel wire, raw materials can be used for incomplete annealing (ballification treatment), semi-finished and finished products can be used for recrystallization annealing; bainitic steel wire, because the general medium and low carbon Cr-Ni The bainite structure is usually obtained by hot rolling. Therefore, the raw materials, semi-finished products can be below the Ac1 temperature for high temperature tempering or annealing to achieve the purpose of softening. The structure of the alloy steel wire and semi-finished product pickling according to the alloying element content and surface oxide properties of pickling. Si, Mn alloy structural steel with sulfuric acid or hydrochloric acid pickling; Cr, Ni, Mo, V alloy structural steel can be mixed with sulfuric acid and hydrochloric acid pickling. After pickling can be dipped in lime or with lime containing yuan powder as a lubricant coating (see lubrication carrier), Tu drying (see wire drying). General alloy structure steel wire drawing when the maximum pass minus the rate (see area reduction) in about 25%, a total reduction in the rate of drawing about 50%.

Bearing wire for the manufacture of bearings with balls and rollers and some blade tools. Mainly made of chromium bearing steel, wire diameter range of 1.4 ~ 16mm. Requirements with high hardness, wear resistance and fatigue resistance, good toughness and a certain degree of corrosion resistance. Therefore, the steel uniformity of the organization, the distribution of carbide, non-metallic inclusions and decarburization degree are stringent requirements. The tensile strength of steel wire is 590 ~ 715MPa. The microstructure of the wire shall be fine granular pearlite of grade 2 to 4.

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