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Full-Text Articles in Science and Technology Studies
Comparison Of Gmaw And Saw For Ngw Of 50 Mm Q&T Steel Plate, Druce Patrick Dunne, Willy Pang
Comparison Of Gmaw And Saw For Ngw Of 50 Mm Q&T Steel Plate, Druce Patrick Dunne, Willy Pang
Faculty of Engineering and Information Sciences - Papers: Part B
A one-pass-per-layer technique was used for narrow gap welding (NGW) of 50 mm thick plate of quenched and tempered steel with 690 MPa minimum yield strength. GMAW and SAW were investigated for pulsed and non-pulsed welding using the same 1.2 mm strength-matching welding consumable and the same nominal heat inputs for each of the pulsed and non-pulsed welds. The welds were defect-free and the hardness, tensile strength and Charpy impact energies were generally consistent with high weldment integrity. Pulsing of the welding current had the effect of slightly increasing side-wall fusion, flattening the weld bead and decreasing its volume. The …
Performance Evaluation And Lubrication Mechanism Of Water-Based Nanolubricants Containing Nano-Tio2 In Hot Steel Rolling, Hui Wu, Jingwei Zhao, Liang Luo, Shuiquan Huang, Lianzhou Wang, Suoquan Zhang, Sihai Jiao, Han Huang, Zhengyi Jiang
Performance Evaluation And Lubrication Mechanism Of Water-Based Nanolubricants Containing Nano-Tio2 In Hot Steel Rolling, Hui Wu, Jingwei Zhao, Liang Luo, Shuiquan Huang, Lianzhou Wang, Suoquan Zhang, Sihai Jiao, Han Huang, Zhengyi Jiang
Faculty of Engineering and Information Sciences - Papers: Part B
Hot rolling tests of a low-alloy steel were conducted at a rolling temperature of 850 °C under different lubrication conditions, including benchmarks (dry condition and water) and water-based nanolubricants containing different concentrations of nano-TiO2 from 1.0 to 8.0 wt%. The effects of nanolubricants on rolling force, surface roughness, thickness of oxide scale, and microstructure were systematically investigated through varying nano-TiO2 concentrations. The results show that the application of nanolubricants can decrease the rolling force, surface roughness and oxide scale thickness of rolled steels, and refine ferrite grains. In particular, the nanolubricant containing an optimal concentration (4.0 wt%) of …