简介：Thesecondsessionof'ChinaOverseasInvestmentSeminar'willbeheldonNovember2to3,2010inBeijing'sChinaWorldTradeCentre.TheseminarisorganizedbyChinaIndustrialOverseasDevelopmentandPlanningAssociation.Underthethemeof'2010:anew

简介：摘要：术语“熔模精密铸造”是指用蜡做成模型，并在模型上涂覆多层耐火涂料,经过干燥、硬化形成型壳。然后进入脱蜡釜使型壳内蜡模熔化流出，再经高温烘烤后将金属液浇入型腔中，待冷却后去壳即成为金属零件。这种方法称为熔模精密铸造。生产精密铸造模具的过程复杂，主要是在模具设计、射蜡、制壳、浇注、去壳和热处理等领域。熔模精密铸造技术已经应用于航天、电子、机械、汽车、医疗器材、运动器材、能源和五金等多种领域。熔模精密铸造技术的主要优点是零件尺寸精度高，毛坯表面平滑细腻，能够制造复杂的小孔和薄壁零件。主要缺点是控制过程需精准、耗时且控制条件相对较多，使用消耗的材料成本较高。因此，它适用于具有复杂结构、高精度要求或难以进一步加工的零件，例如涡轮传动的叶片。因此，精确、高精度的铸造工艺对于制造泵、阀门以及生产高质量的铸造形式(如航空航天)至关重要。制壳是整个工艺中最为重要的环节，在现有工艺中有多种制壳的方法，这些方法对于生产高质量零件至关重要。

简介：pH价值和Y2Y23-SiO2(Y-Si)泥浆>为Ti-6Al-4V投资扔的脸上衣的O3粉末和硅石大音阶的第五音被测量。Y-Si脸上衣系统做的壳的热行为被微分扫描热量计(DSC)调查，热gravimetric(TG)分析与集体spectrometry(MS)结合了，并且阶段转变被X光检查衍射(XRD)决定。热力量，剩余力量，线性扩大系数，和壳的穿的抵抗性能也被测试。微观结构和相互作用层的元素分发被分别地扫描电子显微镜(SEM)和精力散的分光计(版本)学习。microhardness测试者被申请microhardness。结果证明泥浆为至少60是稳定的?h。YZrO3的很小的数量低于1050被形成?普牯慭?楦汥?桴潥祲?畢?畯?敲?瑬?灡汰?畱污瑩瑡癩汥?潴愠眠摩牥挠慬獳漠?睴?楤敭獮潩慮?楤慬潴?牧癡瑩?桴潥楲獥?潆?慥档琠灹?景猠汯瑵潩獮眠?数晲牯?潨潬牧灡楨?敲潮浲污穩瑡潩?挠浯異吗？？

简介：Inrecentyears,Chinahaspromulgatedmanylawsandregulationsofenvironmentalprotection,graduallyforminganenvironmentalregulationsystem,andmostenterprisesareunderthedualpressureofenvironmentalprotectionandbusinessperformance.ItwouldbeasignificantwaythatenterprisesundertakeR&Dactivitiesforachange.ThispaperisbasedontheShanghaiandShenzhenA-sharelistedheavypollutionenterprisesin2011-2016,whichisbasedonthereviewandsummaryofresearchresultsofformerresearchers,combiningwithcurrentenvironmentalregulationsituationofourcountry,raisingtherelevanthypothesisbetweenenvironmentalregulations,R&Dinvestmentandbusinessperformanceagainstheavypollutionindustry.Adoptingthemethodofempiricalresearch,italsobuiltthelinearregressionmodelwhichemploystherelevantfinancialdataofheavy-pollutingenterprisesinChinaasthestatisticalresearchsample.Therelationshipforheavy-pollutingenterprisesaffectedbyenvironmentalregulationsbetweenenvironmentalprotectionR&Dinvestmentandenterprisebusinessperformancewastested.TheresultsshowthatthereisapositiveinfluenceontheenvironmentalR&Dinvestmentandbusinessperformance,andalageffectupontheR&Dinvestmentofenterprisestobusinessperformance.Finally,theresearchresultswereusedtoevaluatesproblemsexistingintheR&DinvestmentonpollutionindustryinChinaaswellasbusinessperformanceandweputforwardsomesuggestionsonimprovingenvironmentalregulationstandardsandtechnologyinnovationconsciousnessaswellasoptimizingthestructureofR&Dinvestment.