The application of high-strength hot-rolled steel bars can decrease the total amount of steel bars and reduce carbon emissions accordingly. Some common quality questions of this kind of products needs to overcome: 1) Unstable nitrogen content in the steel and unreasonable vanadium to nitrogen atomic ratio, resulting in high vanadium…
The size of the grain can be expressed by the number of grains per unit volume, the more the number, the finer the grain. Experiments have shown that fine-grained metals at room temperature have higher strength, hardness, plasticity and toughness than coarse-grained metals. This is because fine grains by external…
Strip steel is extremely versatile, mainly used in the automotive industry, machinery manufacturing industry, construction, steel structures, daily hardware and other fields, and is the raw material for cold-rolled strip, cold-formed steel, welded steel pipes and other steel. Strip steel has the advantages of high dimensional accuracy, good surface quality,…
Inspection and analysis of the mechanical and technical properties, metallographic organization and chemical composition of steel is an important means to ensure the quality of the product, in order to ensure the safe and reliable use. The mechanical and process performance tests mainly include various hardness tests, tensile tests, compression…
There are two main ways to transport hydrogen at this stage, one is to transport hydrogen in long high-pressure pipe trailers and the other is to transport hydrogen by pipeline. Nowadays, the whole length of the hydrogen pipeline has been built around the world about 4670 km, among which about…
Process Flow Advantage Shortage Be suitable for Electric furnace Electric furnace – Secondary refining -CCM – Rolling Alloy elements can be fully utilized Able to accurate control hot liquid temperature for a long time. Smelting period is long and high cost. Adaptable to produce a small batch, multi-specifics and high…
Electrical steel plate, also known as silicon steel sheet, refers to a very low carbon content (after annealing, carbon content in 0.005% below) of ferrosilicon soft magnetic alloy silicon content is generally 0.5%-4.5%. Adding silicon to iron can increase its resistivity and permeability. With the characteristics of low iron loss…
The World Steel Association (worldsteel) has recognised 10 companies as Steel Sustainability Champions for their work in 2022. Now in its sixth year, the Steel Sustainability Champions Programme commends those worldsteel members that are most clearly demonstrating their commitment and action to sustainable development through their involvement in worldsteel sustainability activities. The…
The energy cost of steel plant accounts for about 25%-40% of the total production cost. There is a considerable gap between the energy cost of excellent energy-saving enterprises and that of lagging enterprises, and the energy efficiency of steel mills relates to the benefit and competitiveness of enterprises. The saving-energy and…
Metal composite plates are used in petrochemical, coal chemical, fluorine chemical, fine chemical, acetic anhydride, PTA, chlor-alkali, salt production, metallurgy, medicine, electric power and many other fields. Composite plates are made of a base layer (e.g. carbon steel) combined with a laminate layer (special corrosion resistant or other precious metal…
