Effect of electric current pulse on shrinkage cavity and porosity in casting ZA27 alloy;
脉冲电流对铸造ZA27合金中缩孔和疏松的影响
Factor Analysis and Countermeasures of Porosity and Pipe in Ingot;
钢锭疏松、缩孔的因素分析及对策
In this paper, analysis on the fissuring accident of ZGMn13Cr2Mo antifriction tup is performed, and the reason is believed to lie in serious casting defects of shrinkage cavity, porosity and inclusion.
对ZGMn13Cr2Mo耐磨锤头的断裂事故进行了分析,主要原因是存在着严重的铸造缺陷:缩孔、疏松和夹杂物。
Results indicate that the primary cause to the rupture of the screw in the process of torque force test is proved to be heavily existence of holes and pore gaps in the screw arising from the central looseness of the original billet.
结果得出:螺钉在扭力试验过程中断裂是由于内部存在严重的孔洞和孔隙所造成的,孔洞和孔隙来源于原铸坯的中心疏松。
Mechanism of central parosity and looseness of small billet is described and analysed.
简述小方坯中心缩孔和疏松的形成机理 ,提出减轻中心缩孔和疏松的措
The experimental results show that there are some internal metallurgy flaws such as looseness,shrink hole in the raw material of the axle,and bad widmanstatten structure from the overheating and over-burning during the heating of forging,the comprehensive effects of these factors cause the steel toughness to reduce,and the internal cleavage exists d.
结果表明,车轴轴头原材料中存在疏松、缩孔残余等内部冶金缺陷和锻造热加工中的过热和过烧产生不良的魏氏组织,这些因素的综合作用致使钢的韧性降低,在锻造中发生内部劈裂,最终造成轴头在受外力时脆性断裂。
A new heterogeneous polymerization process, in which water acted as a dispersed phase and methyl methacrylate (MMA) as a continuous phase, was developed to prepare porous poly(methyl methacrylate) (PMMA) resin.
以水为分散相、甲基丙烯酸甲酯(MMA)为连续相进行悬浮态乳液聚合,合成疏松型聚甲基丙烯酸甲酯(PMMA)树脂。
Mold-filling, solidification and prediction of shrinkage porosity in Ti-46%Al alloy investment were performed using the ViewCast code, and the defects observed in the actual products agree well with the simulated results.
应用铸造软件ViewCast模拟精密铸造Ti 46%Al合金叶片的充型与凝固过程,预测了疏松的形成,模拟结果与实验结果相吻合。
Experimental Study on Inhibitory Effect of Osthole on Rat Osteoporosis Induced by Dexamethasone and Its Mechanism;
蛇床子素抑制地塞米松诱导大鼠骨质疏松形成及其作用机制研究
Percutaneous vertebroplasty on centrum compression fracture in patients with osteoporosis
经皮椎体成形术治疗骨质疏松性椎体压缩骨折
Percutaneous Verebroplasty for Osteoporotic Manifold Vertebral Body Fractures
椎体成形术治疗骨质疏松性多种类型椎体骨折
Clinical Application of Percutaneous Vertebroplasty and Kyphoplasty in Treating Vertebral Compression Fractures;
经皮椎体成形与后凸成形术治疗骨质疏松椎体压缩骨折
Signal transduction mechanism change of bone morphogenetic protein-4(BMP-4) in osteoporosis
骨质疏松大鼠的骨形成蛋白-4诱导成骨信号转导机制变化
Study of the gene expression of bone morphogenetic protein(BMP)-2,-7 in the cancellous bone of senior primary osteoporosis
老年性骨质疏松患者松质骨中骨形成蛋白-2及骨形成蛋白-7基因表达
Centreline shrinkage may form a serious line of weakness in the ingot. Surface defects include the following:
轴线缩孔可在钢锭中形成一条很长的疏松线。表面缺陷有如下几类:
Study of Percutaneous Vertebroplasty during Osteoporotic Vertebral Compression Fracture;
骨质疏松性脊柱骨折椎体成形术治疗的相关问题研究
The Experimental and Clinical Studies on Kyphoplasty for Vertebral Compression Fractures;
后凸成形术治疗骨质疏松性椎体压缩骨折的实验与临床研究
A Study of GuKang Oral Liquid on Bone Resorption and Bone Formation of Osteoporosis;
中药骨康对骨质疏松骨吸收与骨形成影响的研究
Clinic Study of Vertebroplasty in the Treatment of Senile Osteoporotic Spine Fracture;
椎体成形术治疗老年性骨质疏松性脊柱骨折的临床研究
Biomechanical Study of Kyphoplasty in the Treatment of Osteoporotic Vertebral Compression Fractures;
椎体后凸成形术治疗骨质疏松性椎体压缩骨折的生物力学研究
Treatmeat of Osteoporotic Vertebral Compression Fractures by Balloon Kyphoplasty;
球囊扩张椎体后凸成形术治疗骨质疏松性脊柱压缩性骨折
Percutaneous Vertebroplasty for the Treatment of Osteoporotic Vertebral Compression Fractures;
经皮椎体成形术治疗骨质疏松性椎体压缩骨折的临床研究
The Experiment Study of the Biomechanics Effect Within Osteoporosis Vertebra Body Distributes in Vertebroplasty
椎体成形术中骨水泥在骨质疏松椎体内分布的生物力学实验研究
Percutaneous Vertebroplasty for the Curative Effect of Osteoporotic Vertebral Compression Fractures
经皮椎体成形术在骨质疏松性椎体压缩骨折中疗效的临床研究
Kyphoplasty with Kypho-X Vertebra Expender for Treatment of Osteoporotic Vertebral Compressive Fractures
球囊后凸成形术治疗骨质疏松性椎体压缩骨折的临床分析
Percutaneous kyphoplasty for vertebral fractures in patients with osteoporosis
经皮后凸成形术在治疗骨质疏松性椎体压缩骨折中的应用