ESR steel forgings grainy video of the
Line of research. After checking the factory of the relevant technical data: 1, l of the hollow shaft 40 steel remelted ingot forging rejection power jabi 2,mulberry norge, melting chemical composition requirements in line with Actinium 4O. Elements CSiMnPS content 0.3-0.450.17, - 0.370.50 ~ 0.80 ≤ 0.035dO. 0353, vertical and tangential mechanical properties were higher than the value of the technical requirements, requirements following table. , Wall sampling vessel index 6b6. 6B1IIAtN/ramN / / lllm% J direction , vertical 49028522047r tangential 4902651530314,uggs kopen, grain size smaller than 5, all kinds of non-metallic debris in less than three central. 5, the entire outer surface of the ultrasound technology after testing, to find equivalent diameter greater than 5-6mm of serious defects. Roughing process, including inspection results were not invented grainy video of the phenomenon. WHY is there such a grainy video of? It without affecting the quality of the hollow shaft? We reviewed - some books and materials, including steel Daye published in May 1964 ESR steel low-fold defect ~ ~ Hom striated segregation article, the article that: 1, corrugated steel segregation is a low-ESR times the defect is in the horizontal leaching in different parts of the specimen on the corrosion resistance due to different degrees and showing a kinds of patterns, much like tree rings, known as ripple-like segregation. 2,mulberry oslo, lack of brain on the longitudinal section in the ingot was multi-U-shaped pattern, its shape and was here to adapt to the shape of the metal bath, almost all through the melting of steel in electric ripple can find. Conclusion is that the article said. l, ESR ripple-like segregation is a layered actinide segregation layer, this grain segregation across the smooth floor bus, too technical ■ t report '1992 · · l a 231 actinium its shape depend on the liquid melt pool shape. 2,ed hardy nederland, corrugated overlooking the mechanical energy analysis of actinides (vertical) and the fracture had no significant impact, even if there are more serious steel corrugated segregation, and its mechanical properties is normal ●'s. 3, Jing layered corrugated fracture and there is no direct relationship between segregation, segregation in the fracture surface ripple is not unusual characterization. 4, the corrugated steel electric Cha segregation during solidification of liquid steel is rooted in a sudden increase in temperature,mulberry outlet, slow crystallization rate shock drama; caused by this process is mainly due to the sudden increase in current or voltage. 5 appropriate to improve the current use of large slag heating value (such as AllO $ tCaO = 55; 45) to raise the temperature during the melting process, can reduce such defects. 6, through thick slag layer, so that the heat consumption of public funds in the slag increase, resulting in metal melting his shallow pool of liquid steel melting temperature is low,ralph lauren outlet, the defect is more serious. 7, Yun-proliferation defect by high annealing significantly reduced. 8,ed hardy lippis, l more than the increase in rolling corrugated code analysis can only stretch along the processing direction, thinning, but not eliminated. 9, the results can be considered to be no segregation ripple (or a slight ripple segregation) of the ingot, remelted at a time should be to stabilize the voltage, the minimum requirement is that voltage fluctuations ≤ 5OV, hourly changes ≤ 100V, so must power remelting equipment and technology to take to ensure a stable supply system of strict measures so as to ensure bath voltage, current, strictly stable, the following measures should be considered. . . 1) use of dedicated power supply electric Yan, secret A power transformer should not prevent other load line impedance increases the voltage fluctuations, electroslag furnace transformer and the distance the closer the better. 2) electroslag furnace telegram sent to the automatic control necessary to ensure current stability. 3) consider the design of low voltage high current alternator replace the furnace transformer to the voltage completely stable. 4) study and adopt other effective measures. 1O, according to the crystallization characteristics and ESR results,uggs, that the less corrugated steel will not affect the quality of segregation, should not be counted as defects, but more serious ripple impact of segregation on the performance of steel-depth study of how t be resolved. By comparing the observations, we believe that the hollow shaft of grainy video of the actinides with Daye corrugated plant segregation, many of the same and there are similarities between the two, the remainder of the hollow shaft forging material,ed hardy espana, select the grainy video of a serious place, the technical requirements of a comprehensive project for re-inspection, re-inspection was commissioned by the Laboratory of institutions of higher learning, the result is a re-inspection items are all character sets technical requirements, the hollow shaft can be used, grainy video of the hazards and prevention methods need to be further explored.
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