简介:Inordertoimproveargonblowingefficiencyina40tonladle,numericalsimulationandwatersimulationexperimentsofthebottomargonflowwereperformed.Relationshipsamongtheladlemixingtime,slageyearea,differentblowingflowrates,anddifferentblowingpositions(0,0.56R,0.62R,0.67R)arediscussed.Resultsshowedthattheladlemixingtimedecreasedwhentheargonblowingbrickdistance(frombottomcenteroftheladle)increased,anddecreasedsignificantlywhentheblowingflowincreasedfrom70to130L/h.Whentheblowingflowincreasedandexceeded130L/h,thestirringeffecttendedtobestable,andtherewaslittleeffectontheladlemixingtime.Theslageyeareaincreasedastheargonbrickdistanceincreased,andwaslargerwhentheargonblowbrickwasneartheladlewall.Wallshearstresssignificantlyincreasedasthebrickdistanceincreasedandwasconcentratedattheslagwallneartheargonflowbrick;thisiscalledthemostseriouserosionwall.Theaveragewallshearincreasedexponentiallywithincreasingargonblowingbrickdistance.
简介:以便改进金属压路机的表演,Mo+Y2O3合金粉末由CO2激光为激光表面alloying处理在40Cr钢压路机底层的表面上一致地习惯于上衣,结果证明许多好后果在增加稀土元素氧化物Y2O3以后被获得。合金层的水晶谷物显著地被精制。水晶谷物的边界被加强。微观结构的一致性和密度被增加。坚硬和合金层的穿的抵抗更加被改进。合金层的原子价电子结构分析被固体和分子(EET)的实验电子理论做。计算结果证明Y应该在第一个阶段被混合,Fe应该在第十八个混合乐队。说明的分析结果稳固的答案的电子理论在alloying上显示出加强的效果层,它提高了契约并且证实了试验性的结果。
简介:采用厚20μm的非晶态Ti-Zr-Ni-Cu钎料,真空钎焊连接用于聚变堆面向等离子体部件的钨和铜铬锆合金,钎焊温度分别为860、880和900℃,对880℃下的钎焊样品进行热等静压(HIP)处理。采用SEM和EDS分析连接接头的形貌和成分,用静载剪切法测量焊接接头强度。测试结果表明在860~880℃下钎焊10min能够获得较好的连接界面,经880℃钎焊后焊接接头的剪切强度为16.57MPa,880℃钎焊后HIP处理的试样界面结合强度提高至142.73MPa,说明真空钎焊后HIP处理可以显著改善接头的结合强度。