With concerted efforts of personnel from Bayi Steel marketing, technology and site operation, Steel Rolling Plant bar and wire unit recently completed commercial production of urgently needed Φ20 steel bolts, and delivered to users in time. Success in rolling of commercial supply steel bolts by Bayi Steel signified its entry into the market.
Steel bolts are commonly used steel types in pit enterprises. It could be applied not only in pit laneways, but also in mines, bridges, tunnels, architecture earthquake resistant and strengthening, anchoring of equipment base, etc. Hot-rolled bolt ribbed bars are new types of cross-section steel products in hot-rolling cycles, mainly used for pit laneway support. It could be applied directly by cutting a certain length in need with fine anchoring effects, strong adaptability and construction convenience. No need for further mechanical processing. It could strengthen steel bolt hardness with lower processing expenditure and fine economic benefits compared with anchoring at ends.
With implementation of West China preponderant resources strategy, demand for steel bolts would be propelled by construction of Lanxin high-speed rail and coal bases. At present, only few steel plants in China could produce steel bolts; uniform national and industrial standards are hardly formulated; enterprise standards and techniques are seldom externally communicated.
Marketing personnel in Bayi Steel started focusing on steel bolts market as early as several years ago. They conducted market research and raised feasible report. Guided by strategic decision of niche production, Bayi Steel departments and manufacture units of Products & Technique Management Department and Steel Rolling Plant, etc. started R&D on product series of steel bolts since last October. Based on experience of high-strength steel production and related types and specifications in the market, they formulated rolling techniques and corresponding internal control standards. Helicoid in rolled-piece steel bolts must be dependent on special spindles. Through test rolling, technical personnel worked out correspondent relations between helical angle and cross rib skew angle, coefficient of slippage on the delivery side, etc. parameters, completed first rolling with success, shortened delivery periods, and laid foundation for rolling of steel bolts in large bulk commercial production.
