Measures and effects of improving Q345R flaw detection rate

1. Control measures to improve Q345R flaw detection rate

Through the Q345R flaw detection analysis, process and composition investigation, the research team developed and implemented the following measures:
Optimize the deoxidation and desulfurization process and strictly control the molten iron w(S) into the converter at 0. Below 03%, the converter tapping adopts pure aluminum block and deoxidizes with the feeding aluminum wire to effectively improve the purity of the molten steel.
Change Q345R steel plate head and tail blanks are thin gauge (less than or equal to 10 mm) products or non-inspective steel grades.
Strengthen the inspection and maintenance of the caster, strictly control the arc deviation within ± 3 mm, and effectively ensure the accuracy and stability of the caster condition.
Effectively reduce the superheat of molten steel casting, control at 5 ~ 20 °C, control and stabilize the drawing speed, liquid level fluctuation and improve the cooling effect.
Guaranteed inspection of steel slabs of slabs of Q345R The slow cooling time is above 36 h.

2. Improve the implementation effect of Q345R flaw detection rate

Through the above measures, from July to August 2012 (as of August 10), the Nangang Medium Plate Plant produced a total of 12 020 Q345R steel plates. 338 t, the flaw detection condition is effectively improved, and the thickness is 14 .The test pass rate of ~ 22 mm is determined by 90. 35 % increased to over 95%, and the overall flaw detection rate was 96. 03% increase to over 98%, and the quality improvement effect is obvious. katalor can supply Q345R steel plate for you , welcome to send inquiry of Q345R steel plate  to email: [email protected]