After forming, the forged, cast or rolled components need to be heat-treated. During heat treatment, scaling causes problems of pit marks, poor surface finish, non-uniform heating and increased shot-blasting / acid pickling time due to heavy scaling.
Use of ESPON anti-scale protective coatings manufactured by Steel Plant Specialities LLP ensures that scaling is prevented or substantially reduced.
During hot rolling of expensive grades of steel such as stainless steel and alloy steels, a 50% reduction in total scale loss on ingots or billets is ensured. This leads to substantial savings due to increased yield. Decarburisation level can be consistently controlled in hot rolling and hot forging. During heat treatment, ESPON protective anti-scale coatings have often achieved zero scaling. However, results vary depending on various technical factors. Substantially reduced scaling during heat treatment leads to improved surface finish, reduced shot blasting time, reduced rejections and reduced quench cracking.
A range of ESPON brand protective coatings are manufactured by M/s. Steel Plant Specialities LLP as per specific technical requirements of preventing scaling and decarburisation in hot rolling, hot forging and heat-treatment operations. Some of the popular ESPON protective coatings and their applications are given below: