In November, the aluminum Fangtong market survey and analysis entered the aluminum square market in November and the demand remained unabated. According to the sales performance of Beijing Dingyi Aluminum Fangtong Marketing Department, the sales volume of Alfangtong exceeded the previous month. Through investigation and analysis, we found that the reason why Alfangtong continued to sell well in November was mainly because some shopping malls, stadiums, office buildings and other buildings were completed. If you don't pay attention to interior decoration in November, it will soon be winter, which is not very good for the construction unit. Moreover, if some interior decoration temperatures are low, it will not work properly. Therefore, some units that use aluminum square pass have recently ordered.
Another reason is that some customers who made promotions last month just called and did not officially purchase. Some of the customers who have recently needed Aluminium is a customer who promoted last month. These two types of customers add up to the role of aluminum Fangtong sales.
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Although there are many types of tapping screws, they all have the following similarities:
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.
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