Category: Metallurgy Insights

Hydrogen is the most significant energy to green development of iron & steel industry. The mainstream production routines of hydrogen are to use fossil energy (coal, natural gas, petrol), renewable energy (solar, wind, water) and nuclear energy. Hydrogen production by electrolysis of water is mostly done by electrolysis of aqueous solutions of caustic potash…

Rolling Parts Rolling is the processing of metal billets through the gap between a pair of rotating rolls (various shapes) to deform the material, mostly used to produce bars, wire rods, profiles, plates and tubes. Rolling can destroy the casting organization of the ingot, refine the grain of steel, and…

Quenched steel is a medium carbon steel with a carbon content of 0.3-0.6%, generally with this type of steel parts required to have good overall mechanical properties, that is, to maintain high strength and at the same time has good plasticity and toughness, is the most widely used structural steel…

Tungsten steel is a sintered composite material containing at least one metal carbide. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide and tantalum carbide are common components of tungsten steel. The grain size of the carbide components (or phases) is usually between 0.2 and 10 microns, and the carbide grains…

Scientists have never stopped researching and exploring better metal forming processes, which can be easily applied, simple and efficient, and can ensure the performance requirements. As far as now, there are eight kinds of metal forming processes being commonly used for various purposes. 1. Casting Liquid metal is poured into…

Stainless steel is divided into: ferritic stainless steel, austenitic stainless steel, martensitic stainless steel, austenitic-ferritic duplex stainless steel, precipitation hardening stainless steel (PH) according to the organizational structure characteristics. 300 series stainless steel are chromium-nickel austenitic. 301 SS is good ductility, good weldability, better wear resistance and fatigue strength than…

Oxygen gun technology can improve the dynamic conditions of slag-steel and dephosphorize fast. Meanwhile, the use of an oxygen gun can shield the radiation of arc light on the furnace lining, which is beneficial to increase the electric heating efficiency and shorten the smelting time. There are coherentjet oxygen guns…

Phosphorus and sulfur content have both favorable and adverse effects on the properties of steel. Phosphorus is a highly efficient solution-strengthening element that has little effect on the formability of cold-rolled steel plates. In continuous casting and heat treatment, phosphorus and sulfur are easily segregated and lead to embrittlement, which the…

In the drawing process of steel wire, the iron oxide (scale) on the wire surface must be removed thoroughly to have a good surface finish of the wire product, which can reduce the loss of drawing die loss. The scaling of metal wire is done by chemical, mechanical, and photoelectric…

The machine vision technology can realize the inspections of hot rolled sheet product such as flatness, head shape, oxide skin thickness, billet convexity after rough rolling, billet size, billet deflection, product shape between finishing stands, in-line finishing roll roughness, and flat shape, whole inspection efficiency and data consistency can be greatly improved. In cold…