笔者浅析绿色评价标准诞生的政策背景,并通过与GB/T 18916.64-2022取水定额第64部分:建筑卫生陶瓷、GB 21252-2013建筑卫生陶瓷单位产品能源消耗限额标准、GB 6566-2010建筑材料放射性核素限量、GB/T 4100-2015陶瓷砖以及BS EN 14411:20...笔者浅析绿色评价标准诞生的政策背景,并通过与GB/T 18916.64-2022取水定额第64部分:建筑卫生陶瓷、GB 21252-2013建筑卫生陶瓷单位产品能源消耗限额标准、GB 6566-2010建筑材料放射性核素限量、GB/T 4100-2015陶瓷砖以及BS EN 14411:2016 ceramic tiles—definition, classification, characteristics, assessment and verification of constancy of performance and marking等标准中指标的对比分析,溯源分析部分评价指标的设定依据,旨在更多维度地理解陶瓷砖(板)的绿色评价要求。展开更多
According to the differences in melting point between aluminum alloy and steel, 6013-T4 aluminum alloy was joined to galvanized steel by large spot Nd：YAG laser ＋ MIG arc hybrid brazing-fusion welding with ER4043（A...According to the differences in melting point between aluminum alloy and steel, 6013-T4 aluminum alloy was joined to galvanized steel by large spot Nd：YAG laser ＋ MIG arc hybrid brazing-fusion welding with ER4043（AlSi5） filler wire. The microstructures and mechanical properties of the brazed-fusion welded joint were investigated. The joint is divided into two parts of fusion weld and brazed seam. There is a zinc-rich zone at fusion weld toe, which consists of α（Al）-Zn solid solution and Al-Zn eutectic. The brazed seam is the Fe-Al intermetallic compounds （IMCs） layer of 2-4μm in thickness, and the IMCs include FeAl2, Fe2Al5 and Fe4Al13. FeAl2 and Fe2Al5 are located in the compact reaction layer near the steel side, and Fe4Al13 with tongue shape or sawtooth shape grows towards the fusion weld. The tensile strength of the joint firstly increases and then decreases as the welding current and laser power increase, the highest tensile strength can be up to 247.3 MPa, and the fracture usually occurs at fusion zone of the fusion weld. The hardness is the highest at the brazed seam because of hard Fe-Al IMCs, and gradually decreases along the fusion weld and galvanized steel, respectively.展开更多
文摘笔者浅析绿色评价标准诞生的政策背景,并通过与GB/T 18916.64-2022取水定额第64部分:建筑卫生陶瓷、GB 21252-2013建筑卫生陶瓷单位产品能源消耗限额标准、GB 6566-2010建筑材料放射性核素限量、GB/T 4100-2015陶瓷砖以及BS EN 14411:2016 ceramic tiles—definition, classification, characteristics, assessment and verification of constancy of performance and marking等标准中指标的对比分析,溯源分析部分评价指标的设定依据,旨在更多维度地理解陶瓷砖(板)的绿色评价要求。
基金Project (50905099) supported by the National Natural Science Foundation of ChinaProject (20090131120027) supported by the Specialized Research Fund for the Doctoral Program of Higher Education,China
文摘According to the differences in melting point between aluminum alloy and steel, 6013-T4 aluminum alloy was joined to galvanized steel by large spot Nd：YAG laser ＋ MIG arc hybrid brazing-fusion welding with ER4043（AlSi5） filler wire. The microstructures and mechanical properties of the brazed-fusion welded joint were investigated. The joint is divided into two parts of fusion weld and brazed seam. There is a zinc-rich zone at fusion weld toe, which consists of α（Al）-Zn solid solution and Al-Zn eutectic. The brazed seam is the Fe-Al intermetallic compounds （IMCs） layer of 2-4μm in thickness, and the IMCs include FeAl2, Fe2Al5 and Fe4Al13. FeAl2 and Fe2Al5 are located in the compact reaction layer near the steel side, and Fe4Al13 with tongue shape or sawtooth shape grows towards the fusion weld. The tensile strength of the joint firstly increases and then decreases as the welding current and laser power increase, the highest tensile strength can be up to 247.3 MPa, and the fracture usually occurs at fusion zone of the fusion weld. The hardness is the highest at the brazed seam because of hard Fe-Al IMCs, and gradually decreases along the fusion weld and galvanized steel, respectively.
