Improving Grindability of Stainless Steel Clad Surface Using SiC Wheel
摘要
Cladding provides a thick protective covering on low-cost structural material to improve its surface as well as bulk-dependent properties like corrosion resistance, erosion resistance, etc. As clad materials are difficult to conform to desired shape and dimensional accuracy as per technical and aesthetic point of view, grinding of the clad surface may be undertaken to achieve the specified shape, size, and accuracy. Objective of this work is to improve grindability of the clad surface made by gas metal arc welding using AISI-316 stainless steel electrode, while silicon carbide wheel is used for grinding. Experiments are conducted under two environmental conditions that are dry and drop-by-drop lubrication technique which is also known as small quantity lubrication (SQL). During experimentation, several responses are noted like grinding forces, specific grinding energy, presence of crack, grinding ratio, chip forms, etc. Experiments are conducted at varying infeed, i.e. depth of cut. Experimental results show that specific grinding energy on the whole is found lower in SQL than that in dry condition with an infeed of 10 µm. However, at higher infeed of 15 µm, no remarkable benefit is observed under SQL condition. This may be due to lack of presence of lubricants in the wheel–workpiece interface area, particularly at higher infeed. Therefore, application of SQL can be recommended for grinding stainless steel cladding with 10 µm infeed while using SiC grinding wheel.