Seamless calcium cored wire
Data: 50 heats
Steel grades:
S235JR
SPHC
Q235BE1
Smooth feeding w/o breakage
Ave recovery: 61.97%
The denaturation of inclusions in clean molten steel by calcium metal is a normal process in the smelting process. How to improve the absorption of calcium in the steelmaking process, stabilize the calcium content in molten steel, reduce the cost of feeding calcium lines, better suitable for smelting refined steel products, and reduce smelting costs are the goals that steel companies have been seeking. Our company's seamless calcium line (high calcium line) processing process meets this requirement.
The process principle and effect of seamless calcium wire (high calcium wire) : the status of inclusions in molten steel is related to the amount of calcium added, adding time and adding speed.
Speed: inappropriate feeding speed, calcium absorption rate is low, calcium is evaporated; Suitable speed, high calcium absorption rate, less calcium evaporation.
Time: After feeding the calcium line, immediately sampling, the impurities in the steel have obvious changes, and most of them are converted into CaO-Al2O3-CaS inclusions, which are small in size and nearly spherical in shape, but not fully globalized.
In the mold sampling, most of the inclusion into CaO-Al2O3 inclusion, spherical, CaS content is low.
CaO, Al2O3, CaS, Ca are lower than when the wire was just fed, in the sample in the billet, the inclusion changes again, and becomes CAO-Al2O3-CAS inclusion, the shape is no longer spherical, the size is slightly larger than that in the mold, this is because the steel solidification S segregation, reaction with calcium to form CaS, and the inclusion polymerization, Increase in size. The Al and O in the molten steel react, and the inclusions expand again.
Feeding calcium: the amount of feeding line (CaSi line) should be enough to form 12CaO7 Al2O3 at the same time to consider the loss, it is generally believed that the residual calcium content in the steel after feeding line is 30-40ppm.
Calcium denaturation treatment with silicon calcium wire, calcium iron wire, aluminum calcium wire, and pure calcium wire will also be very different. The residual calcium content in molten steel is also an important index for the treatment of molten steel calcium. When the mass fraction of molten aluminum is 0.02-0.05%, the residual calcium mass fraction is 29ppm, and the Ca/Al is 0.058-0.145. The test results show that W(Ca)/W(Al) : 0.13-0.20 is the best, feeding the general silica calcium wire dosage of 0.9kg/ ton of steel.
Zhengshan Technology Based on the advantages of Battery manufacturing industry, the key word "win-win culture" Battery manufacturing Seamless calcium cored wire service provider - Zhengshan Technology advocates "win-win cooperation", which means to achieve win-win both internally and externally. Internally, it is Zhengshan Technology employees themselves. The company creates a good atmosphere, ambitious goals, creates a comfortable Zhengshan Technology cultural environment, employees achieve their own career goals and growth, and Zhengshan Technology achieves their interests goals, which is a virtuous circle of "win-win cooperation". Externally, Zhengshan Technology has created good Battery manufacturing Seamless calcium cored wire products and services, and customers have been recognized, providing Battery manufacturing customers with a good service experience, which is also "win-win", and the sense of trust has been further strengthened. This is Zhengshan Technology complementary ecological win-win.
