X60冶炼小结.doc

X60冶炼连铸小结3月28日，一炼钢厂冶炼了7炉B/CKX60-Mo+TM钢，技术科和车间相关人员对整个冶炼、浇注过程进行了系统的跟踪，现将本次试验的跟踪情况小结如下：1冶炼过程成分控制表1冶炼成分%8-04015TS0.47150.1310.0237LD0.070.0600.0180.0180.661YH0.040.960.170.0110.0130.126LF10.0461.340.1830.0130.0050.060.0035E-040.0020.0030.0020.005LF20.0491.3380.2130.0140.0030.050.0041E-040.0320.0040.0030.122LF30.0531.330.2220.0140.0030.0480.0040.0020.0320.0040.0180.121RH10.0581.3170.2250.0140.0020.0530.0040.0020.0320.0040.0170.119CP0.061.330.230.0140.0010.030.0058E-040.0320.0030.0140.1218-04016TS0.46540.14650.0216LD0.060.0500.0130.0230.547YH0.030.990.140.0110.0190.069LF10.0431.2730.1570.0130.0090.0140.0037E-040.0020.0030.0020.005LF20.0551.3420.2120.0130.0050.050.0030.0010.0320.0040.0030.077LF30.071.3450.2340.0140.0020.0280.0040.0020.0310.0040.0150.137RH10.071.3450.2380.0130.0020.0440.0040.0010.0310.0040.0120.138CP0.081.340.250.0140.0010.0370.0050.0010.0310.0030.0110.1389-04909TS0.42560.13420.0351LD0.060.0500.0120.0280.533YH0.041.220.170.0110.0210.061LF10.0561.2480.1570.0090.0110.0170.0044E-040.0020.0020.0010.005LF20.0631.3520.2140.010.0060.0470.0037E-040.0020.0040.0020.129LF30.0771.350.1850.0110.0030.030.0040.0030.030.0030.0180.129RH10.0841.3640.1890.0110.0030.0660.0050.0020.0320.0040.0160.129RH20.0781.3540.1950.0110.0020.04700.0030.0310.0030.0130.129CP0.081.350.20.0110.0020.0430.0050.0020.0310.0030.0130.1288-02816TS0.47930.13650.0221LD0.070.0700.0210.0240.646YH0.041.190.150.0150.0180.053LF10.0331.3040.160.0130.010.0250.00200.0020.0040.0020.005RH10.0451.3320.2180.0140.0050.0390.0032E-040.0020.0040.0020.005LF20.0461.3520.220.0140.0040.0490.0033E-040.030.0030.0030.035LF30.051.3380.2270.0140.0030.0440.0040.0010.030.0040.0030.052LF40.0561.3550.230.0140.0020.0330.0041E-040.0310.0040.0030.108LF50.0621.3530.2350.0140.0010.0390.0060.0030.0310.0030.0140.181CP0.061.360.230.0140.0010.0430.0060.0010.0310.0030.0160.189-04910TS0.41980.13430.023LD0.090.0700.010.0210.629YH0.040.890.130.0080.0180.078LF10.0571.2710.1760.0090.0130.0580.0036E-040.0020.0030.0020.006LF20.0651.3510.2190.0090.0090.0920.0034E-040.0320.0040.0030.117LF30.0671.3390.2280.010.0050.0680.0050.0010.0310.0040.0180.118RH10.0681.3430.2270.010.0040.0540.0060.0010.0310.0030.0160.116RH20.0681.3430.230.010.0030.0420.0050.0030.0310.0030.0150.118CP0.071.350.230.010.0030.0360.0050.0010.0310.0030.0140.1189-04911TS0.44390.13430.0237LD0.050.0400.0110.020.587YH0.041.260.180.0110.0150.053LF10.0541.3120.1790.0110.0090.0280.0038E-040.0020.0030.0020.008LF20.0621.3390.2130.0110.0040.0340.0044E-040.0330.0030.0030.146LF30.0691.3240.2190.0110.0020.0450.0053E-040.0330.0040.0160.145RH10.0671.3410.220.0110.0020.0480.0055E-040.0330.0040.0150.146CP0.071.340.220.0110.0020.0410.0040.0010.0330.0030.0140.1478-04019TS0.56710.13980.0283LD0.050.0400.0160.0250.381YH0.040.990.150.010.0220.056LF10.0471.2560.1690.010.0070.0130.0058E-040.0020.0030.0020.005LF20.0541.3450.220.010.0040.04102E-040.0020.0040.0030.122LF30.0671.3330.2320.0110.0030.04805E-040.0320.0040.0170.122RH10.0641.3210.2320.0110.0020.04507E-040.0320.0040.0180.121CP0.071.350.240.0120.0020.0350.0050.0020.0330.0040.0160.126分析：从成分来看，B/CKX60-Mo+TM钢种，C、P控制较好，S0.003，吹氩站喂入铝线250米/炉，其中9-4910和8-4015两个炉号Alt偏高，分别达到0.058%和0.06%。2转炉冶炼2.1造渣制度炉号白云石矿石石灰冷固球团改质剂精炼石灰脱硫剂7-25512052318456041992631829-463715613176440930653162321559-463814743414496820142702301559-463616325644560211931312331497-25543207310153432112741837-25552458426650822191842.2冶炼及合金情况炉号倒炉温度/补吹/s到Ar站/LD合金CMnPS金属锰硅铁脱氧剂铝铁Al线7-255116224115880.050.070.0130.017160447 1159-463715440.060.050.0080.0161592135 89 113 9-46383215420.070.050.0060.0271575199 208 9-463615253115860.060.060.0140.0151596134 51 112 7-255416103415740.050.040.020.0311592130 199 208 2507-2555159715470.050.060.0120.0171591130 195 204 250分析：转炉冶炼过程中，为控制C、P含量，某些炉次倒炉温度偏低；出钢过程加入金属锰1650-1695Kg，硅铁110Kg，7-2551、9-4637、9-4636转炉脱氧剂加入量偏少，7-2554、7-2555在Ar站喂入Al线250m。3LF精炼冶炼3.1渣料及合金加入情况炉号石灰精炼渣萤石Al粒电石粉中锰硅铁钼铁铌铁钛铁Ca线8-040156713861564040/22050601508-040166343801073040/2275060/9-0490959640110060401629023950601508-02816645316112304079632275060/9-0491060038510060401346021750601509-04911635390106304060/23150601508-0401961741012060401386021850601503.2冶炼记录炉号冶炼周期通电时间软吹时间到站温度出站温度钢包号钢包等级8-0401511228164021C8-0401610336.2162511C9-04909964616352D8-028161953815156137A9-0491011343162035A9-0491111241163131D8-0401912134162019A分析：为保证RH炉节奏，8-2816提前上RH，然后返回做中包第四炉。4RH精炼记录炉号冶炼周期循环周期纯脱气时间真空度软吹时间到站温度出站温度8-04015402013010163015278-04016432010012162515709-049094420106510162015668-028162210601515619-049105122126220161515649-0491134141105161315668-0401942201001016151567分析：本次冶炼钢包热周转不及时，导致整个冶炼炉次中有2个C级钢包和2个新钢包，导致在RH温度控制难度大，其中9-4909 出站温度1566，中包后期温度低关钢水20吨，9-4911 处理过程温降大，导致处理时间短，软吹时间只有5分钟，工艺未达到。5连铸浇注情况见下表炉号浇注次序LF/RH中包温度/拉速m/min引流7-25511RH1536/15510/0.9否9-46372RH1540/15440.9否9-46383RH1540/15460.85/0.9是9-46364LF1547/15490.9否7-25545RH1534/15420.9否7-25556RH1532/15370.9是连铸浇注情况1、开浇前三大氩气管路系统检查正常，中包烘烤正常；开浇过程气幕挡墙开气，5包覆盖剂时，中包液面微微冒泡，15包时不冒泡；大包转换时长水口碗部有冷钢，使用氧气吹扫；轻压下使用2270断面的压下参数；2、9-4638，大包油缸套不上降速0.85，转过来20吨，引流15.4吨开，未保护浇注1分09秒，降速0.85持续7分14秒，中包低于20吨浇注长度从59.2962.49米，为第一块坯料头部；3、7-2555，引流，未保护浇注2分50秒，浇注长度为154.3156.89米，为第一块的中间部位；4、 低倍8-4638偏析C0.5，北面有缩孔,见附图；5、 表面修磨情况：7-2551-1，头坯有横裂，7-2555-5，后面接P44-2+TM，有横裂全剥，其他正常。6轧制情况1、落锤试验轧批号炉号规格物理项目值1值2H2-081177-255117.5落锤试验(DWTT)横向剪切面积(SA%)9798H2-081187-255117.5落锤试验(DWTT)横向剪切面积(SA%)9593H2-081197-255417.5落锤试验(DWTT)横向剪切面积(SA%)9797H2-081207-255417.5落锤试验(DWTT)横向剪切面积(SA%)9898H2-081217-255417.5落锤试验(DWTT)横向剪切面积(SA%)9294H2-081229-463617.5落锤试验(DWTT)横向剪切