Dee Tee Industries Limited

Nand Nagar, Indore, Madhya Pradesh

DeeTee rolls out world class forged rolls- Sendzimir mill rolls cluster mill rolls, 6Hi, 4Hi and 2Hi mill rolls, skin-pass rolls etc.The rolls are prone to very tough working conditions and have to be perfect in terms of wear resistance, toughness and hardness. Right from the raw-material inspection, to heat treatment , to grinding and final dispatch, all rolls undergo very stringent quality checks.The raw-material is generally imported from renowned sources from worldwide and is checked for macro structure analysis, micro structure analysis, ultrasonic soundness and heat-treatment response. Proper heat-treatment cycles ensure hardness uniformity and proper depth of hardness.

Proper designing, selection of raw material, salt bath heat-treatment, and CNC finished profiles help to maximize the tonnage per regrind and yields quality end products. Roll designing is a very critical stage as it affects the cost of the rolls, life of the rolls, productivity of the mill, and the quality of the tube section. DeeTee uses COPRA ( German) software for the roll designing. The customer has to provide only the basic details of the mill and the input and output details.The tube mill rolls are made out of superior quality imported tool steels. Mostly AISI D2 1.2379 SKD11 AND AISI D3 1.2080 SKD1. The rod mill rolls are generally subjected to very high working temperatures and so are made from hot work tool steel grades like AISI H13 1.2344 SKD 61.Salt bath heat-treatment is considered to be the best for tool steels. The high-carbon-high-chromium grades are through hardening steels i.e. , when heat-treated they attain the hardness right from the outer surface till the inner core. Proper heat-treatment gives good toughness, wear resistance and uniform hardness to the rolls used in rod mill, tube mill, wire rod mills.The profile of the rolls are finished on CNC machines resulting in high surface accuracy and bright shiny finish of the rolls.