国产精品白丝无码ThePorn_在线观看 日本一区_亚洲图片另类图片_琪琪色电影院_午夜性刺激免费的视频_午夜免费拍拍视频观看_成一级在线观看视频网站_亚洲国产国语高清在线网址_欧美v日韩v亚洲v最新_免费男女牲交全过程播放

Hi?n tr?ng nghiên c?u và ?ng d?ng l??i kim c??ng

2014-06-28 1080

Research and application status of diamond cutting blade
Diamond cutting sheet appears more and more in the factory, so the diamond cutting usage now whether optimism? Let the following Xiaobian for you on the present status of research and application of diamond cutting blade.
Resin production of diamond thin film cutting is a type of insurance can be an excellent way, usually choose the thermosetting phenolic resin as binder, it is the practice of diamond grains mixed with resins, and then use the method of hot pressing sintering and thermal curing after grinding processing, this process needs a few hours, and thus the higher cost of production. With the skills of the forward, heat curing resin gradually replaced by light cured composite resin, light cured resin is mainly composed of a base polymer (photo crosslinkable polymers), reactive diluents (a photopolymerizable monomer), light initiating agent and additive. Chemical reaction process differences between it and heat curing resin the essence lies in its curing process is to absorb the appropriate wavelengths of light and lead, which change from a liquid to solid is a molecular weight added results, rather than the solvent evaporation of the form, so it has fast curing, no pollution, energy saving advantages, but the restriction factor is the raw materials price is higher.