The surface of the wire along the rolling direction is straight or jagged unwelded gap, in the cross-section presents folding defects called folding, generally along the rolling direction is continuous or intermittent distribution. Folded sides are often accompanied by decarburisation layer or part of the decarburisation layer, folding seam in…
On the surface of the wire and the body of the adhesion of a head or completely non-adhesive metal layer called scarring. Generally it is tongue-shaped, uneven thickness and size. Some scars are rooted, some not rooted, in the full length of the wire, regular or irregular distribution. Scars will impact on the wire surface…
Wire surface parallel to the direction of the extended rolling bar raised called lugs, was continuous or intermittent distribution. On one side of the wire called unilateral lugs; on both sides of the wire called bilateral lugs; wire up and down the two semicircular staggered called wrong side lugs. Mainly…
VD furnace is mainly used to refine steel liquid via vacuum degassing treatment, to precisely and finely adjust the component of steel liquid in order to meet the production requirement of special steel and high-quality steel. Through the treatment of VD furnace, the hydrogen content of steel liquid can be…
Austenitic Stainless Steel 347H belongs to high-carbon Cr-Ni austenitic stainless steel containing niobium, due to the stabilizing element Nb, its stability is very strong, good resistance to intergranular corrosion and resistance to acid stress corrosion, with good weldability, high-temperature strength and plasticity, is widely used in the boiler, power generation, petroleum, chemical…
Recently, an international standardㄗIron ores — Determination of chromium content — Flame atomic absorption spectrometric method) in the field of chemical analysis of iron ore led by China has been officially approved for the establishment of the project (ISO/AWI 15634) by the International Organization for Standardization (ISO). This international standard…
Through optimizing temperature control process the mechanical properties of wire rod can be improved. According to the wire rod organization mechanism transformation during production, combined with the requirements of the production conditions of each steel specification, targeted adjustment of the heating temperature, spitting temperature and the operation of cooling fans can…
High-aluminium steel production technology High-aluminium steel with high strength, high toughness, low density, low cost and other advantages, widely used in automotive, energy and other key industries. However, with the substantial increase in the aluminium content of high-alumina steel, its production difficulty increases steeply, especially in the continuous casting of…
The state of rolling mill will influence the operation of the whole production line, it is necessary to do routine maintenance for smooth operation of the whole line. (1) Keep that all lubrication stations operate normally and the pipeline has no leakage; (2) Hydraulic stations work steady, the pipeline has…
