Category: Metallurgy Insights

Longitudinal cracks on the surface of the continuous casting billet are due to the unevenness of the thickness of the primary billet shell on the bending moon surface of mould, which acts on the tensile stress of the billet shell exceeding the allowable strength of the steel, leading to fracture…

Steel slag can be used as blast furnace and converter raw materials in steel plants, and can also be used for  road engineering, building materials, agricultural fertilizer and pit filling. In sintering ore with steel slag instead of flux, it can not only recycle the residual steel, FeO, CaO, MgO, MnO…

Xingsteel successfully developed a super pure iron DT4C wire, by a number of customers to use the report information feedback: the material is not only low residual elements, high cleanliness, cold upsetting performance is good, and coercive force standard is significantly better than the national standard requirements. DT4 belongs to…

Traditional top charging electric furnace, simple equipment, less investment in land area, flexible and simple operation, but its production process is not continuous, heat loss is large, the impact on the environment is large. Theoretically, the single furnace smelting cycle is 60min, electricity consumption is 400kWh/t, and electrode consumption is…

Frontier scientific problem How to achieve low energy artificial intelligence? How to achieve maneuvering in the upper atmosphere? Can the new coincidence measurement method search for the existence of magnetic monopole and axionic dark matter? Do nonlinear effects vary with scale? What are the basic scientific issues affecting the development…

The rolling line of each stand should align in the same straight line so that is the production can normally work. If there is light offset of stand rolling line, the guide could be damage caused by uneven wear of the hole pattern; serious offset can directly cause the accident of steel stacking. The meaning…

After pickling the surface of continuous casting billet, it was found that there were mesh cracks on the surface of the billet, and the depth was up to 5mm. What causes the mesh cracks? The main reasons are: (1) The surface of the high temperature casting billet absorbs the copper…

Events Reasons Solutions 1 Rolled parts not bitten into the rolls and steels stacked The end part of a billet is forked To pick out unqualified billet The guide isn’t installed properly To Reinstall the guide The rolling piece in the guide orgroove is blocked To remove away obstructive Not polish new groove after replacenew groove. To polish new groove andregulate the rolling speed 2 Steels piled after the rolling piece have been bitten into the rolls The speed of rolling piece isn’t right. Correctly setting the speed Roll diameter input error To input the correct rolldiameter Tension setting is too small afterchanging rolls and grooves Increase the tension settingappropriately Incomplete grinding after changingnew groove Further grinding of the rolls 3 Steel stackeddue to steel jamming between rolls Motor overload,overspeed,and dropout Check steel temperature,roll size,rolling speed and electrical faults 4 Flying shear 1#,2#steel stacking Flying shear overrun speed is toolow Increase the overrun speedof flying shear Flying shear does not cut the head Check power supply,hotmetal detector Shear blade aging or poor overlap Replace shear blade,adjustoverlap Interrupt flying shear action Checking hot metaldetectors…

The transverse cracks on the surface of continuous casting billet are located at the trough of the vibration mark on the inner arc surface of the billet, which is usually hidden and invisible. After pickling, it can be found that the crack depth is up to 7mm and the width…

In strip steel line most popular cooling mode is laminar cooling. Pressure injection cooling is characterised by continuous jetting of water, good directionality cooling efficiency is not high, serious spattering, there is high requirements to water quality. Aerosol cooling with gas will be atomised water, its cooling capacity is very…