Packaging steel strip low hardness of defects

Insufficient packaging steel strip hardness defect profile of hardness is refers to the packaging steel strip after heat treatment, the hardness is not reached the requirements of process files or standard, this kind of problem is very complex, from the perspective of the packaging steel strip heat treatment itself, in addition to the mixing, should begin from the six major factors affecting the quality of the product, the parameters related to the packaging steel strip hardness one by one analysis, find out reason and root cause, avoid the happening of hardness defect. General heat treatment quality problems should be from the following aspects were analyzed and discussed, and the packing of heat treatment of steel belt is divided into two basic processes, heating and cooling in the heating stage heating speed, heating temperature and holding time is an important process parameters, and the cooling of the cooling medium temperature in cooling phase, the characteristic and the cooling time directly affect the packaging steel strip integral uniformity of hardness, so the above several important process parameters to control and guard a pass strictly, eliminate all influence the problem of insufficient hardness, make the packaging steel strip uniform hardness after heat treatment, improve the service life of the packaging steel strip.