A Machinability Study of Hard-Facing Weld Metal on JIS-S50C Carbon Steel

Abstract

The feasibility study of the face-milling performance of hard-facing weld metal on JIS-S50C carbon steel was investigated on microstructure, chip characteristics, wear properties, and surface roughness. Discontinuous chips were found in all machining conditions. No buffering weld metal (No buffering layer, NBL) produces longer and thicker chips than that of the buffering weld metal (Buffering layer, BL). The flank wear of the cutting tool edge increases with the cutting length of the test specimen. The maximum wear of 850 mm was found in a wet condition of the NBL weld metal which is about 4 times higher than that of the base metal. High hardness value of the NBL weld metal produces a higher flank wear of the cutting tool edge than that of the BL weld metal. After comparing the wear of the cutting tool edge in wet and dry conditions, it was found that the dry condition exhibits a smaller flank wear than that of the wet condition. In the wet condition, more amount of coolant oil droplets cannot penetrate into the chip-tool interface and then provides an insufficient amount of lubricant in order to decrease the cutting temperature. Therefore wet condition produces severe wear of the cutting.

Modeling and multiple optimization in face milling of hardfacing welding applied steel: Force, roughness, power

“…For this reason, the increase in cutting power with the increase in cutting speed is due to the tool cutting edge geometry that changes with the wear of the tools, as can be stated in Refs. 9,22. In addition, it is seen that the cutting power varies according to the tool coating quality at the same cutting parameters.…”

“…As a result of the research, it was emphasized that an optical scanner is a convenient technique for measuring the size and deformation of weld joints, improving the milling process, and material analysis. 21 Poonnayom et al 22 investigated the machinability of hardfacing weld metal applied on JISS50C steel in dry and wet conditions in terms of microstructure, chip and wear properties, and surface roughness. In the study in which TiN+TiCN+Al 2 O 3 coated carbide tools were used, more tool wear was observed in the wet environment than in the dry condition, since sufficient coolant oil droplets could not enter the chip-tool interface.…”

TIG Overlap Welding Affecting Hard-Faced Weld Metal Properties on JIS-S50C Carbon Steel

“…3. As the increase of the hardfaced weld metal layer could reduce the dilution effect in the welding of various steels and ferrous metal [5,10,11,15], the hardness and the wear resistance of the weld metal produced by optimized welding current and OL were increased with increase in the welding layer, as shown in Fig. 11.…”

Influence of Gas Metal Arc Welding Parameter on Lap Joint Properties of SS400 Carbon Steel and SUS304 Stainless Steel

“…9 and the fracture was located near the interface between the base metal and the WM. This was attributable to high alloying elements in the electrode wire (such as manganese, chromium, and Ni) which could form the reinforced particle to affect in increasing of the WM strength [10,11] and shifting the fracture location to initiate at another critical point showing lower hardness. When comparing the hardness of the interfaces of WM/SS and WM/CS, the WM/CS interface showed the lower hardness than that of the WM/SS interface, but the fracture could be observed at location nearby the WM/SS interface.…”