The welding conditions were as follows:a U groove,ER90S-B9 welding wire and E9015-B9 covered electrode,using the GTAW backing welding method,with the filled and surface layer covered by SMAW. The pipes were preheated at 250350 for 2 hours;
The test results showed that as remelting using 75CaF_2-15Al_2O_3-10CaO pure ternary slag the Ti burning loss rate was 7.0%,lowest in 4 slag systems and free slag groove of ingot surface which occurred as remelting using 70CaF_2-30Al_2O_3 binary slag
It can be used for the section area (0.8 mm×0.8 mm) ,long groove(l=600 mm) ,or for the thin film(δ=0.4 mm) charging. For the groove of 410 mm in length,the difference of detonation transmissions between its maximum and minimum is only 0.18 μs.
The 500 MHz one-port SAW groove resonator made in our laboratory, for which the unloading quality factor Qu>20,000, and the motional resistance R1 = 20-30 Ω, has been used as a frequency controlled element to construct an oscillator.
Moreover,Cd2+ and DNA could form an electro inert compound,resulting in the decrease of the peak electric current of cathode,indicating that the interaction between Cd2+ and DNA was groove combination of insert mode.
Based on MD simulation, nanometric-grinding mechanism is analyzed from the viewpoint of instantaneous distribution of atoms, grinding force, and the potential energy between atoms and the profile of the groove.
The good agreement in the profile of the groove between the experimental value and the simulating value shows that MD simulation is very effective and reliable, and successful to fulfill the investigation on nanometric machining mechanism.
A laser vision sensing based on the adaptive tungsten inert gas (TIG) welding system for large-scale aluminum alloy components was established to fit various weld groove conditions.
A new type of laser vision sensor was used to precisely measure the weld groove.
An adaptive welding process was realized by automatically adjusting the wire feeding speed and the welding current according to the groove conditions.