Hyundai Steel has shut down the acid rolling production line at the Tangjin Plant

Hyundai Steel announced the temporary shutdown of the acid rolling production line at the cold rolling plant of Tangjin Plant. This is the first time that Hyundai Iron & Steel has made such a deci...

Rimmed Steel, Killed Steel And Semi-Killed Steel

The steel ingot can be divided into rimmed steel, killed steel and semi-killed steel according to the different deoxidation degree of the steel.Rimmed steel is a steel without deoxidation or full deox...

Cold Processing Hardening Of Metal Materials

Definition of Cold process hardening The strength and hardness of metal materials increase wh...

Pipe Billet Cleaning

Sometimes, due to continuous casting, pouring or forging and rolling process accidents, on the surface of the tube billet there are knots scar or pits, grooves, individual blanks still exist cracks. ...

Determination Of Heating Speed Of Tube Billet

The heating speed of the tube billet usually refers to the heating speed of the surface of the tube billet. Heating speed, heating furnace production capacity, metal oxidation, low unit fuel consumpti...

Inspection And Cleaning Of Steel Tube Billet Defects

Defect Check:Generally use of visual inspection. If the surface quality requirements are relatively high, and the more oxide scrap on tube billet,it can be used pickling or shot peening treatment of t...

Formation Of Delamination Defects In Steel Strip And Its Effect On Steel Pipe Quality

The stratification is caused by the shrinkage defects of the ingot. The middle section of the steel plate rolled by ingot with shrinkage cavity is easy to occur stratification.The inner layer of the ...

Why The Lower The Sulfur Content Of Molten Steel, The Better The Vacuum Nitrogen Removal Effect

The production practice has proved that the temperature of molten steel in RH treatment has little effect on the content of [n] in molten steel, but the vacuum degree has great influence on the conte...

Tube Billet Heating Quality And Control

Tube Billet Heating quality requirements:(1)The heating should be based on rolling conditions, at any time to adjust the heating temperature of the tube billet.Require the tube billet along the cross...

Non-Metallic Inclusions And Its Effect On Steel Tube

Non-metallic inclusions are strip oxides, sulfide, brittle and plastic silicate in the metal matrix, which is the reason of the impurity of the steel. When the ingot segregation is serious, the non-m...

The Cause Of Delamination Defect Of Steel Plate And Its Influence On Steel Pipe Quality

The delamination defect of steel plate is caused by the shrinkage defect of ingot. The steel ingot with shrinkage cavity will form a stratification in the middle of the gang strip after rolling. The i...

Brief Introduction Of Metal Salt Mist Test

Most of the corrosion of metallic materials occurs in the atmospheric environment, which contains corrosive components such as oxygen, humidity, temperature changes and contaminants, as well as corro...

Factors Of Heat Treatment Deformation Of Steel

Factors Of Heat Treatment Deformation Of Steel The main reason of steel heat treatment deformation is the presence of internal stress or external stress in steel. The internal stress is caused by t...

The Role Of Silicon In Steel Pipes

Silicon element is added as reducing agents and deoxidizers in the steelmaking process, so killed steel will contain 0.15-0.30% of silicon, when the amount of silicon in steel exceeds 0.50-0.60%, the...

Introduction To Steel Segregation

Severe inhomogeneity of steel composition is called segregation. This phenomenon includes not only the uneven distribution of common elements such as carbon, manganese, silicon, sulfur and phosphoru...

Introduction Of Electric Arc Furnace Steelmaking

Electric arc furnace (EAF) steelmaking use electrical energy as heat source for steelmaking process, it is produced by the discharge between the electrodes and the burden of arc, the electric energy ...