A PROCESS FOR MANUFACTURE OF CRUSHER HAMMERS BY FORGING AND A CRUSHER HAMMER MADE USING THE PROCESS

摘要

A process to manufacture crusher hammers by forging used in coal granulator of thermal power plant is disclosed. It uses step-wise forging operation to achieve final shape of crusher hammers, followed by unique heat treatment. The process starts with a preform made from a round billet and follows through with a upsetting followed by finisher forging, flash trimming and piercing operation. The forged components are further heat treated to get improved mechanical properties (strength, wear resistant, hardness, toughness etc.) and longer life. The hammers made using conventional processes have low life due to high wear rate and it may increase cost of replacement in very early stage. This problem is solved by the hammers manufactured by the process of invention.