Aiming to meet the demand of the country' s nuclear demonstration project on the CAP1400 nuclear power plant, Baosteel uses the roll-bonding technology and develops the SA-533 Type B CL. 1 + SA-240 Type 304L high-st...Aiming to meet the demand of the country' s nuclear demonstration project on the CAP1400 nuclear power plant, Baosteel uses the roll-bonding technology and develops the SA-533 Type B CL. 1 + SA-240 Type 304L high-strength and high-toughness clad steel plate with a shear strength of over 310 MPa for the nuclear power plant' s safety injection tank. The properties of the quenched and tempered and the simulated post-weld heat treatment states are systematically studied herein through a comprehensive inspection and evaluation of the composition,microstructure,and properties of the clad steel plate. The results show that the bonding interface has high shear strength and that the base metal has high strength and good toughness at low temperatures. Hence, the performance fully meets the technical requirements of the CAP1400 nuclear power plant' s safety injection tank in the country' s nuclear demonstration project. The roll-bonded clad steel plate can be used to manufacture the safety injection tank of the CAP1400 nuclear power plant.展开更多
目的探讨下肢骨折牵引复位装置辅助复位钢板内固定治疗SchatzkerⅥ型胫骨平台骨折的临床康复疗效。方法选取2016年1月至2022年8月唐山市第二医院SchatzkerⅥ型胫骨平台骨折患者600例,根据手术方法分为观察组(413例)和对照组(187例),观...目的探讨下肢骨折牵引复位装置辅助复位钢板内固定治疗SchatzkerⅥ型胫骨平台骨折的临床康复疗效。方法选取2016年1月至2022年8月唐山市第二医院SchatzkerⅥ型胫骨平台骨折患者600例,根据手术方法分为观察组(413例)和对照组(187例),观察组采用下肢骨折牵引复位装置辅助复位钢板内固定治疗,对照组采用传统切开复位钢板内固定治疗。比较两组围术期指标,术后6个月和术后12个月的美国特种外科医院膝关节评分(hospital for special surgery knee score,HSS)、下肢Fugl-Meyer运动功能评价量表(Fugl-Meyer assessment scale,FMA)评分、骨折愈合优良率及术后并发症发生率。结果600例患者中,男383例,女217例,年龄21~65岁,平均(49.5±8.1)岁。观察组手术时间、术中出血量、骨折复位时间和住院时间均低于对照组[(77.93±25.60)min比(103.35±30.75)min、(29.68±10.70)ml比(161.91±23.65)ml、(39.90±20.65)min比(53.30±16.71)min、(7.25±1.70)d比(12.50±2.85)d],术后6个月HSS评分及FMA评分均高于对照组[(85.64±3.31)分比(84.76±3.57)分、(26.53±2.34)分比(25.81±2.41)分],骨折愈合优良率高于对照组(84.50%比59.36%),创伤性关节炎、下肢深静脉血栓、愈合畸形、关节僵硬及切口感染发生率均低于对照组(4.84%比10.16%、0.48%比9.09%、4.84%比12.30%、7.51%比14.44%、1.21%比3.74%),差异均有统计学意义(P<0.05);两组术后12个月HSS评分及FMA评分、钢板周围深层感染发生率的比较,差异无统计学意义(P>0.05)。结论与传统切开复位钢板内固定治疗相比,下肢骨折牵引复位装置辅助复位钢板内固定治疗SchatzkerⅥ型胫骨平台骨折创伤小、术中出血量少、愈合优良率高、并发症少,更有助于膝关节功能及下肢运动功能恢复。展开更多
文摘Aiming to meet the demand of the country' s nuclear demonstration project on the CAP1400 nuclear power plant, Baosteel uses the roll-bonding technology and develops the SA-533 Type B CL. 1 + SA-240 Type 304L high-strength and high-toughness clad steel plate with a shear strength of over 310 MPa for the nuclear power plant' s safety injection tank. The properties of the quenched and tempered and the simulated post-weld heat treatment states are systematically studied herein through a comprehensive inspection and evaluation of the composition,microstructure,and properties of the clad steel plate. The results show that the bonding interface has high shear strength and that the base metal has high strength and good toughness at low temperatures. Hence, the performance fully meets the technical requirements of the CAP1400 nuclear power plant' s safety injection tank in the country' s nuclear demonstration project. The roll-bonded clad steel plate can be used to manufacture the safety injection tank of the CAP1400 nuclear power plant.
文摘目的探讨下肢骨折牵引复位装置辅助复位钢板内固定治疗SchatzkerⅥ型胫骨平台骨折的临床康复疗效。方法选取2016年1月至2022年8月唐山市第二医院SchatzkerⅥ型胫骨平台骨折患者600例,根据手术方法分为观察组(413例)和对照组(187例),观察组采用下肢骨折牵引复位装置辅助复位钢板内固定治疗,对照组采用传统切开复位钢板内固定治疗。比较两组围术期指标,术后6个月和术后12个月的美国特种外科医院膝关节评分(hospital for special surgery knee score,HSS)、下肢Fugl-Meyer运动功能评价量表(Fugl-Meyer assessment scale,FMA)评分、骨折愈合优良率及术后并发症发生率。结果600例患者中,男383例,女217例,年龄21~65岁,平均(49.5±8.1)岁。观察组手术时间、术中出血量、骨折复位时间和住院时间均低于对照组[(77.93±25.60)min比(103.35±30.75)min、(29.68±10.70)ml比(161.91±23.65)ml、(39.90±20.65)min比(53.30±16.71)min、(7.25±1.70)d比(12.50±2.85)d],术后6个月HSS评分及FMA评分均高于对照组[(85.64±3.31)分比(84.76±3.57)分、(26.53±2.34)分比(25.81±2.41)分],骨折愈合优良率高于对照组(84.50%比59.36%),创伤性关节炎、下肢深静脉血栓、愈合畸形、关节僵硬及切口感染发生率均低于对照组(4.84%比10.16%、0.48%比9.09%、4.84%比12.30%、7.51%比14.44%、1.21%比3.74%),差异均有统计学意义(P<0.05);两组术后12个月HSS评分及FMA评分、钢板周围深层感染发生率的比较,差异无统计学意义(P>0.05)。结论与传统切开复位钢板内固定治疗相比,下肢骨折牵引复位装置辅助复位钢板内固定治疗SchatzkerⅥ型胫骨平台骨折创伤小、术中出血量少、愈合优良率高、并发症少,更有助于膝关节功能及下肢运动功能恢复。