A CAD System for Tube Drawing Based on Finite Element Simulation of Drawing Process

Acicular Ferrite (AF) is beneficial in welds because it provides a tough and strong microstructure. Therefore, much works have been done in the study of the effect of alloying elements and welding conditions aimed at obtaining more AF in the weld metal. However, the knowledge about the nature of AF is limited due to the lack of kinetics researches. In this paper, the kinetic curves of AF transformation in an X65 weld metal were established by means of welding thermal simulation test. The results showed that AF transformation is a typical diffusion process of nucleation and growth with incubation period. AF transformation in weld metal obeys the relationship described by JMA Equation. The effect of welding heat input was also studied.

FE-Simulation of Technology of Upsetting 73×5.51 EU Tubing

The samples have been verified by means of optical microscopy, electron scanning microscopy and microprobe for fracture analysis. The results showed that the fracture is caused by many inclusion cracksand flakes. The method to reduce or eliminate cracks was presented.

芪药消渴胶囊联合吡格列酮治疗2型糖尿病的临床研究

目的探讨芪药消渴胶囊联合吡格列酮治疗2型糖尿病的临床效果。方法选取2016年3月—2018年3月北京远洋健康博雅诊所有限公司收治的2型糖尿病患者98例,随机分成对照组(49)和治疗组(49)。对照组口服盐酸吡格列酮片,1片/次,1次/d。治疗组在对照组基础上口服芪药消渴胶囊,6粒/次,3次/d。两组均连续治疗8周。观察两组患者临床疗效,同时比较治疗前后两组患者血糖、血脂、胰岛素、血流变参数、白介素-1β(IL-1β)、活性氧(ROS)、还原型谷胱甘肽(GSH)和C反应蛋白(CRP)水平。结果治疗后,对照组临床有效率为79.6%,显著低于治疗组的93.9%,两组比较差异具有统计学意义(P<0.05)。治疗后,两组空腹血糖(FPG)、糖化血红蛋白(HbA1c)、三酰甘油(TG)/高密度脂蛋白胆固醇(HDL-C)、空腹胰岛素(FINS)、胰岛素抵抗指数(HOMA-IR)血浆水平及血流变参数红细胞变形指数(EDI)、血浆黏度(PV)和红细胞聚集指数(EAI)值均显著降低,同组治疗前后比较差异具有统计学意义(P<0.05),且治疗组患者上述参数明显低于对照组,两组比较差异具有统计学意义(P<0.05)。治疗后,两组血清IL-1β、ROS、CRP水平均显著降低,血清GSH水平显著升高,同组治疗前后比较差异具有统计学意义(P<0.05),且治疗组患者IL-1β、ROS、GSH和CRP水平明显优于对照组(P<0.05)。结论芪药消渴胶囊联合吡格列酮治疗2型糖尿病可有效控制患者血糖水平,纠正脂代谢紊乱,增强胰岛素敏感性,疗效确切。