Brief introduction to defects of insufficient hardness of packaging steel strip

Brief introduction to defects of insufficient hardness of packaging steel strip
　　Insufficient hardness means that the hardness of the packaging steel strip after heat treatment does not meet the requirements of the process documents or standards. This type of problem is very complicated. From the perspective of the heat treatment of the packaging steel strip itself, in addition to the mixing, the impact Start with the six major factors of product quality, analyze the parameters related to the hardness of the packaging steel strip one by one, find out the reasons and root causes, and avoid the occurrence of hardness defects. General heat treatment quality issues should be analyzed and discussed from the following aspects. The heat treatment of packaging steel strips is divided into two basic processes, heating and cooling. In the heating stage, the heating speed, heating temperature and holding time are important process parameters, while in the cooling The cooling temperature, characteristics and cooling time of the cooling medium in the stage directly affect the uniformity of the overall hardness of the packaging steel strip. Therefore, the above-mentioned important process parameters must be strictly controlled and checked to eliminate all problems affecting the insufficient hardness, so that the packaging steel strip can be heat treated. After the hardness is uniform, the service life of the packaging steel belt is improved.