彩涂镀锌板发脆的原因

彩涂镀锌板使用一段时间后可能出现脆性，这通常是生产加工过程中工艺造成的，因此，要避免这种现象，就需要及时找出原因，做好预防工作。下面是介绍脆性的原因。
1、 彩涂镀锌板模具放电不均匀，造成型材壁厚密度不一致。这导致了型材两侧的机械功能差异。对于薄壁等非标准型材，这里没有更多的讨论。

2、 模具截面布置不合理，尤其是内肋的分布和界面视图的处理。有必要改进规划，消除界面的直角和锐角。
3、 彩涂镀锌板定模冷却速率。冷却水温度往往没有引起足够的重视。冷却水的作用是及时冷却由型材拉伸的高分子链，达到应用的目的。
4、 缺少模具压力。模具头部的压力取决于模具的压缩比，特别是模具的直截面长度。如果模具头压缩比太小或直截面过短，成品将不会细、密实，影响物理功能。
彩涂镀锌板在加工过程中，如果操作方法错误，很容易造成今后的质量问题，因此在加工过程中，要注意正确把握方法，确保生产工艺的合理规划，当工艺中出现脆性现象时，及时做好相应的处理工作。

Color coated galvanized sheet may appear brittle after using for a period of time, which is generally caused by the technology in the process of production and processing, so if you want to avoid this phenomenon, you need to find the reasons in time and do a good job in prevention. Here is to introduce the reasons for brittle.

1、 The die discharge of color coated galvanized sheet is uneven, resulting in the inconsistency of profile wall thickness and density. This results in the difference of mechanical function between the two sides of the profile. As for the non-standard profile such as thin wall, there is no more discussion here.
2、 The layout of die section is unreasonable, especially the distribution of inner ribs and the treatment of interface view. It is necessary to improve the planning and eliminate the right angle and acute angle at the interface.
3、 The cooling rate of the setting die for color coated galvanized sheet. The cooling water temperature often does not lead to enough attention. The role of cooling water is to cool the macromolecular chain stretched by the profile in time to achieve the purpose of application.
4、 Lack of die pressure. The pressure at the die head is determined by the compression ratio of the die, especially the length of the straight section of the die. If the compression ratio of die head is too small or the straight section is too short, the finished product will not be fine and dense, which will affect the physical function.

Color coated galvanized sheet in the process of processing, if the operation method is wrong, it is easy to cause quality problems in the future, so in the process of processing, we should pay attention to the correct grasp of the method, ensure the reasonable planning of the production process, and timely do the corresponding treatment work when there is brittle phenomenon in the process.