Abstract
Steel tire cord and steel saw wire represent typical precision pearlitic steel wire rods of wire products; it is a very important solar energy material with a diameter about 50 μm. This paper mainly discusses the research progress of the wire rod drawing process, and its main contents are as follows: First section—the control of the wire rod surface quality is summarized, including the thickness of the surface decarburization layer, the phase composition and thickness of the surface iron oxide scale, and the removal of surface iron oxide scale. Then, the research progress of the wire rod water bath treatment process during sorbitization is summarized. In addition, the development of brass plating technology for steel wire is summarized, including copper plating technology, coating phase composition, etc. Furthermore, the development of steel wire drawing methods is summarized. Finally, the development of the dies used in steel wire drawings is summarized.
Highlights
Steel cord with a diameter about 80 μm is mainly used to make tire frame material, and steel saw wire with diameter about 50 μm is mainly used to cut the silicon wafers used for solar cells, as shown in Figure 1 [1]
For ultra-fine steel wires such as steel cord and saw wire, any defect in the production process may lead to wire breakage, such as large-scale hard inclusions in the steel wire, too-thick iron oxide scale on the steel wire surface, uneven internal structure of the steel wire, insufficient compact coating structure on the steel wire surface, damage of grinding tools for drawing steel wire, etc. [2]
(2) In hot-rolling, the depth of surface decarburization layer of hot-rolled wire rod for a P72LXA steel cord can be reduced by decreasing the actual high-temperature area (900–1050 ◦C) of the billet heating section and extending the low-temperature area (600–800 ◦C) of the preheating section
Summary
Steel cord with a diameter about 80 μm is mainly used to make tire frame material, and steel saw wire with diameter about 50 μm is mainly used to cut the silicon wafers used for solar cells, as shown in Figure 1 [1]. The drawing process is the same as that of cord steel wire, but the steel saw wire needs to be drawn more times due to its diameter is smaller, as shown in Figure 2 [2]. The most common problem in the production and use of tire steel cord and saw wire is wire breakage. Once the steel saw wire breaks, the whole silicon rod will be scrapped, which will cause serious economic losses [1]. To produce high-quality steel saw wire, it is necessary to making high-quality steel but, to have a drawing process suitable for the rod. Each step has a crucial influence on the quality of the finished steel wire. 0.183400 Tab0.l1e73254. 0T0he prop0e.r1t6i3e06s0o0f a saw 0w.1ir53e07r0o0d
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