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 Wysłany: Pią 2:15, 07 Sty 2011 Temat postu: ed hardy Under the strong oxidizing atmosphere in |
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Under the strong oxidizing atmosphere,[link widoczny dla zalogowanych], low carbon silicon ingot production per ton electroslag
Policy is to attack 72.25Cr-lMo electroslag steel forgings tempered plain chest features (VTr ¨ ten & VTr ¨), ℃ heat number JHHH} HJH, HH7: H at fH, Hl0llP71r5 '+ r \8l a 3,[link widoczny dla zalogowanych], f a 5 'a 57-59-3BJ53J a '2 a 51ll control,[link widoczny dla zalogowanych], x factor, namely the control of chemical composition. research shows 【, P, Si and Mn contribute to the degree of brittle materials is varied, Tr degree of temper embrittlement and (P) +0.03 (Si) +0.02 (Mn) in general linear. all the parts of the P forgings no more than 0.008,[link widoczny dla zalogowanych], substitution tables 2 and 3 The data, in all Forgings, (P) + O.O3 (Si) + O.o2 (Mn) = O.020, check diagram _41,[link widoczny dla zalogowanych], we can see hVTr.: <0, the forging of P , SiMn content has been reduced to the extent not affect the range of temper embrittlement. This is the material in a temperature range of temper embrittlement resistance to temper embrittlement E worry not appear important reason for the deterioration of toughness. 4.4 low control is ugly production of live C, low ESR Qian Wei Si large hypoxic control key problems, so that under the strong oxidizing atmosphere Si large-scale production of low C low ESR ingots into metal can be 6 Shanghai, opened up a large oil from the surface high-pressure chemical Steel containers new production means. 5. References [1] Bruscato, R, WeldJ., 1970,49,] 48 [2] Swift, RAetB】, WeldJ.. 1979. 92.93 [3] Steven, W . eta1., JlSl, 1959,193 Oo) 141 ~ l | [4] Sato pay us, Ji1 cockroach system drum technical report, 1990,19 (1)-gl ~ [5] Takano is fork shame tR & D Kobe actinium Technical Report .1983,33 (3) I2 ~ 19 [6] is uncle and other Shiga, iron columbium, 1986,72 (] 4) I125 ~ 131 s l5 transcripts [7] Watanabe, J.eta1., Proc.46thAPI . MidyearMeeting, I99] ,216-223 [B] Mao Sheng are also other, the pressure technique, 198], 19 (3): 8 ~ I4 [9jKohno, MetaI, ASTMSTP,] 982. 755.2l, 8E1o] Vachel ' , tI.C., J.ResearchNat.BurStand ~ rds, I933, 11,94 E513Ward, R.G, AnIntroductiont0thePhysica] ChemlstryofIronandSteeMaking, 5962, EdwardArnoldPub] lshersLtd [12] Hilty, D.Ceta1, J. Metals, 5950,2, 595 British UES has successfully works with a vertical continuous casting machine casting grade steel mills British UES company SES, in 1982 installed a vertical flow l Taiwan 4 billet caster, after 5 years of testing and improvements, from 1987 grade steel casting works, and successfully overcome the common kind of small cast steel billet continuous casting machine generated when the problem of segregation and surface cracks. The plant measures for improvement of continuous casting machine are: 1. tundish sliding nozzle Taosai replace the original rod, thereby reducing heat loss, effective control of the casting speed and mold level to ensure that the automatic open casting at the same time, the rejection of magnesia lined with warm spray in the middle of the whole package instead of the original room temperature brick lining of tundish superheat reduced to 10 ~ C, the amount of open water down to hydrogen when the l × 10 or less. 2. Install servo-hydraulic mold vibration device, and select the appropriate flux, greatly reduced slab marks the depth of the earthquake and the leakage of copper accident. 3. In cooling systems, the original 90. Arrangement of four cooling water nozzles, changed to 45. arranged eight nozzles, which eliminates the high around the slab the middle of the radial stress and circumferential cracks in order to achieve a lower cost to obtain the equivalent of aerosol cooling effect. 4. CaSi improved treatment of molten steel. used to be processed in the VAD, CaSi added to the ladle core wire, copper water cleanliness is not guaranteed. VAD after 1987 to the early stage of adding CaSi wire, but also reduced feeding wire 40, so not only improved the casting of copper water availability, and improve the steel cleanliness. He Wei From SteelTimesl99l, ( 12)
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