CN1074322C - Technical process for preparing cold rolling roller from normal steel - Google Patents

Abstract

The present invention relates to a technical method for preparing a cold rolling roller from normal steel. Grade 35 steel and Grade 45 steel are cast into a blank; the blank is preheated to 150 to 250 DEG C; the temperature is preserved for 2 to 4 hours, and the blank is slowly cooled; the blank is then mechanically processed, which leads the accuracy to satisfy the requirement. When the technical method is adopted, the yield rate can reach 100%, the hardness can reach HRC62 to 69, no crack occurs, and the service life is extended by 2 to 6 times.

Description

Process with preparing cold rolling roller from normal steel

The present invention relates to a kind of process, belong to the technical field that roll is made with preparing cold rolling roller from normal steel.

The consumption of roll is very big in the metallurgical industry, all uses 9G2M usually.The V material is made roll, and this material need be with valuable rare metal, so the cost height, and yield rate is very low, mostly is the 60-70% yield rate both at home and abroad, improves its roll hardness by heat-treatment quenching, strengthen its wearability, though hardness can reach HRC60-63, its use all is disposable, can not use built-up welding to come repairing cold rolling roller, waste real the genus, and the expert asserted once that hardness can't improve both at home and abroad, crackle occurred and also was inevitable.

The objective of the invention is to provide a kind of worker who produces cold roll with common iron to dare method, it can solve raising hardness, avoid occurring the defect of crackle, and the manufacturing of roll, do not re-use the 9G2M.V material, as long as use common No. 35 and No. 45 steel, by special process, just can be made into suitable cold roll, and improve 2-6 times of service life than the existing domestic and international cold roll that is using.

The method of manufacturing technology of this cold roll is as follows:

1, base: with 35 common steel, 45 steel are made the blank of roll earlier;

2, preheating: blank is carried out preheating, and temperature reaches 150-250 ℃

3, insulation, slow cooling: begin with high hardness wear-resisting medicine core surfacing, insulation is 2-4 hour after having welded, and just begins slow cooling, use its mechanism performance all to conform with requirement, and hardness can reach more than the HRC62, even can reach HRC69

4, machining

Carry out before the car above-mentioned roll or grinding, make roll reach the desired precision size of rolling mill, can make qualified cold roll thus.

Compared with prior art, the process with normal steel manufacturing cold roll has following advantage:

1, uses normal steel to make roll, can save a large amount of rare metals, cost is greatly reduced;

2, yield rate can reach 100%;

3, hardness reaches HRC62-69, but the flawless of determining takes place;

4, technology is simpler;

5, can repeat to repair use tens times.

Claims (1)

1, a kind of process with preparing cold rolling roller from normal steel is characterized in that making technology and is divided into 4 steps:

(1), base

With 35 common steel, 45 steel are made the blank of roll earlier;

(2), preheating

Blank is carried out preheating, and temperature reaches 150-250 ℃

(3), insulation, slow cooling

Begin with high hardness wear-resisting medicine core surfacing, insulation is 2-4 hour after having welded, and just begins slow cooling, use its mechanism performance all to conform with requirement, and hardness can reach more than the HRC62, even can reach HRC69

(4), machining

Carry out before the car above-mentioned roll or grinding, make roll reach the desired size of rolling mill, can make qualified cold roll thus.