Iron-plating technology used for restoration of axis parts was applied to the manufacture of diamond bits in this paper.The technology for electroplating diamond bit of iron matrix was mastered through repeated experi...Iron-plating technology used for restoration of axis parts was applied to the manufacture of diamond bits in this paper.The technology for electroplating diamond bit of iron matrix was mastered through repeated experiments and research.The productive practice indicated that the DC-electroplated iron matrix of diamond bit has high hardness and good diamond exposure ability;the drilling rate of electroplated iron-based diamond bit was 2 m/h when drilling in grade 9 granite and bit life can reach 44 m,which can satisfy the drilling production requirements.展开更多
Mixed coordination compounds M(α AP)2(OAc)2 (M=Ni, Zn) were synthesized individually via solid phase reactions between α aminopyridine and nickel acetate or zinc acetate at room temperature and were characterized by...Mixed coordination compounds M(α AP)2(OAc)2 (M=Ni, Zn) were synthesized individually via solid phase reactions between α aminopyridine and nickel acetate or zinc acetate at room temperature and were characterized by elemental analysis, IR and X ray powder diffraction. Zn(α AP)2(OAc)2 was also determined by 1H NMR, TGA and X ray single crystal diffraction. The crystal belongs tomonoclinic system with space group P21/c, a=9.1900(18)?, b=13.900(3)?, c=13.310(3)?, β=92.40(3)°, V=1698.7(6)?3, Dc=1.453g·cm-3, Z=4,F(000)=768, μ=1.469mm-1, R1=0.0376, wR2=0.1202. Each zinc?atom lies at the center of a distorted tetrahedron composed of two oxygen atoms from a pair of monodentate acetate groups and two nitrogen atoms from a pair of pyridine rings.展开更多
文摘Iron-plating technology used for restoration of axis parts was applied to the manufacture of diamond bits in this paper.The technology for electroplating diamond bit of iron matrix was mastered through repeated experiments and research.The productive practice indicated that the DC-electroplated iron matrix of diamond bit has high hardness and good diamond exposure ability;the drilling rate of electroplated iron-based diamond bit was 2 m/h when drilling in grade 9 granite and bit life can reach 44 m,which can satisfy the drilling production requirements.
文摘Mixed coordination compounds M(α AP)2(OAc)2 (M=Ni, Zn) were synthesized individually via solid phase reactions between α aminopyridine and nickel acetate or zinc acetate at room temperature and were characterized by elemental analysis, IR and X ray powder diffraction. Zn(α AP)2(OAc)2 was also determined by 1H NMR, TGA and X ray single crystal diffraction. The crystal belongs tomonoclinic system with space group P21/c, a=9.1900(18)?, b=13.900(3)?, c=13.310(3)?, β=92.40(3)°, V=1698.7(6)?3, Dc=1.453g·cm-3, Z=4,F(000)=768, μ=1.469mm-1, R1=0.0376, wR2=0.1202. Each zinc?atom lies at the center of a distorted tetrahedron composed of two oxygen atoms from a pair of monodentate acetate groups and two nitrogen atoms from a pair of pyridine rings.
