1.The material is 20CrMnTi/JIS-SCM415,the hardness is 56-60HRC,the carbon depth >0.8mm Collet Chuck,Bt40 Eoc25 Millingchuck,Bt40 Oz 25 Colllet Chuck,Eoc Oz Milling Chuck Shandong Chongde Precision Machinery Co.,LTD , https://www.springcollet.com
2.Precision taper<=AT3
3.Chuck shank do -196℃ super-long cryogenic treatment and thermal aging treatment.
4.Default of dynamic balance standard ,G6.3 18000rpm.Precision dynamic balance G6.3 12000RPM.Surface coating processing .
5.We can to figure to sample processing ,and perfect after-sales service and technical support .
é”— extraction method
Germanium extraction method is to first germanium chloride enriched with concentrated hydrochloric acid was prepared to take four germanium chloride, to remove the main impurities of arsenic extraction solvent with hydrochloric acid, and then purified by silica column distillation twice, and then by high Washing with pure hydrochloric acid can obtain high-purity ruthenium tetrachloride, and hydrolyzing ruthenium tetrachloride with high-purity water to obtain high-purity cerium oxide. Some impurities will enter the hydrolysis mother liquor, so the hydrolysis process is also a purification process. Pure germanium dioxide by drying and calcining, in a quartz tube furnace reduction with hydrogen at 650-680 deg.] C was reduced to give metallic germanium.é”— It has many special properties and is widely used in semiconductor, aerospace measurement and control, nuclear physics detection, optical fiber communication, infrared optics, solar cells, chemical catalysts, biomedicine, etc. It is an important strategic resource. .