A novel double 1：11 series arsenotungstate, [Cu^I（phen）2]5H6[Sm（AsW11O39）2]·6H2O （phen=1, 10-phenanthroline） was synthesized by the hydrothermal method and characterized by elemental analysis, 1R spectra, ...A novel double 1：11 series arsenotungstate, [Cu^I（phen）2]5H6[Sm（AsW11O39）2]·6H2O （phen=1, 10-phenanthroline） was synthesized by the hydrothermal method and characterized by elemental analysis, 1R spectra, and single-crystal X-ray diffraction. The title compound was monoclinic, space group P2 1/c, a=3.75710（2） nm, b=1.39776（8） nm, c=-3.33735（18） nm, β=96.967（10）°, V=17.3969（17） nm^3, Z=4. Single crystal X-ray structural analyses revealed that the dimeric polyanion, [SmAs2W22O78]^1-, consisted of one central Sm^3＋ ion and two tetradentate heteropoly ligands [ASW11O39]^7-. The Sm^3＋ ion and two tetradentate defective [AsW11O39]^7- anions were joined together by the sharing of four oxygen atoms from each heteropoly ligand. The bond valence sum （BVS） calculations of the title compound suggested that all four Cu atoms were in the ＋1 oxidation sate.展开更多
采用Al Ti N涂层硬质合金刀具对1Cr11Ni2W2MoV以及2Cr13两种型号的不锈钢进行车削试验,利用激光共聚焦显微镜观察刀具的前、后刀面磨损形貌,对刀具的主要磨损机理及磨损形式进行分析。研究结果表明:1Cr11Ni2W2MoV的加工难度大于2Cr13;...采用Al Ti N涂层硬质合金刀具对1Cr11Ni2W2MoV以及2Cr13两种型号的不锈钢进行车削试验,利用激光共聚焦显微镜观察刀具的前、后刀面磨损形貌,对刀具的主要磨损机理及磨损形式进行分析。研究结果表明:1Cr11Ni2W2MoV的加工难度大于2Cr13;硬质合金刀具切削1Cr11Ni2W2MoV不锈钢时,刀具主要的磨损形式为月牙洼磨损以及边界磨损,失效形式主要为崩刃;切削2Cr13不锈钢时,刀具的主要磨损机理为粘结磨损。展开更多
In this paper, 1Cr11Ni2W2MoV steel that is aerial engine blade materials was hot dipped Al-6%Si-4%RE in order to improve its application temperature. According to GB/T13303-91 standard, samples with coating and withou...In this paper, 1Cr11Ni2W2MoV steel that is aerial engine blade materials was hot dipped Al-6%Si-4%RE in order to improve its application temperature. According to GB/T13303-91 standard, samples with coating and without coating were oxidated at 700℃ from 5 h to 600 h. Two oxidation kinetics curves were drawn in terms of data of tests. The results showed that oxidation resistance of 1Cr11Ni2W2MoV steel hot-dipped Al-6%Si-4%RE is better than one without coating. From SEM and EMPA, the surface of coating formed dense and uninterrupted α-Al2O3, which is the bars of oxidation resistance. In addition, according to one crossing point of the two curves, it was suggested that hot dipped aluminum steel should be annealed before used.展开更多
By means of laser shock processing (LSP) treatment,a nanostructured surface layer was formed on 1Cr11Ni2W2MoV stainless steel.Group contrastive high cycle fatigue tests were carried out in 1Cr11Ni2W2MoV stainless stee...By means of laser shock processing (LSP) treatment,a nanostructured surface layer was formed on 1Cr11Ni2W2MoV stainless steel.Group contrastive high cycle fatigue tests were carried out in 1Cr11Ni2W2MoV stainless steel before and after LSP treated.The experimental data was analyzed by mathematical statistics method and the influence mechanism of fatigue properties affected by LSP treatment was also researched.The results indicate that LSP treatment can improve the high cycle fatigue life of 1Cr11Ni2W2MoV stainless steel effectively.The ultra-fine grained surface layer with residual compressive stress and nanostructured surface layer make great contributions to the improvement in fatigue properties of 1Cr11Ni2W2MoV stainless steel.展开更多
基金the Natural Science Foundation of Henan Province (0611011900)
文摘A novel double 1：11 series arsenotungstate, [Cu^I（phen）2]5H6[Sm（AsW11O39）2]·6H2O （phen=1, 10-phenanthroline） was synthesized by the hydrothermal method and characterized by elemental analysis, 1R spectra, and single-crystal X-ray diffraction. The title compound was monoclinic, space group P2 1/c, a=3.75710（2） nm, b=1.39776（8） nm, c=-3.33735（18） nm, β=96.967（10）°, V=17.3969（17） nm^3, Z=4. Single crystal X-ray structural analyses revealed that the dimeric polyanion, [SmAs2W22O78]^1-, consisted of one central Sm^3＋ ion and two tetradentate heteropoly ligands [ASW11O39]^7-. The Sm^3＋ ion and two tetradentate defective [AsW11O39]^7- anions were joined together by the sharing of four oxygen atoms from each heteropoly ligand. The bond valence sum （BVS） calculations of the title compound suggested that all four Cu atoms were in the ＋1 oxidation sate.
文摘采用Al Ti N涂层硬质合金刀具对1Cr11Ni2W2MoV以及2Cr13两种型号的不锈钢进行车削试验,利用激光共聚焦显微镜观察刀具的前、后刀面磨损形貌,对刀具的主要磨损机理及磨损形式进行分析。研究结果表明:1Cr11Ni2W2MoV的加工难度大于2Cr13;硬质合金刀具切削1Cr11Ni2W2MoV不锈钢时,刀具主要的磨损形式为月牙洼磨损以及边界磨损,失效形式主要为崩刃;切削2Cr13不锈钢时,刀具的主要磨损机理为粘结磨损。
文摘In this paper, 1Cr11Ni2W2MoV steel that is aerial engine blade materials was hot dipped Al-6%Si-4%RE in order to improve its application temperature. According to GB/T13303-91 standard, samples with coating and without coating were oxidated at 700℃ from 5 h to 600 h. Two oxidation kinetics curves were drawn in terms of data of tests. The results showed that oxidation resistance of 1Cr11Ni2W2MoV steel hot-dipped Al-6%Si-4%RE is better than one without coating. From SEM and EMPA, the surface of coating formed dense and uninterrupted α-Al2O3, which is the bars of oxidation resistance. In addition, according to one crossing point of the two curves, it was suggested that hot dipped aluminum steel should be annealed before used.
文摘By means of laser shock processing (LSP) treatment,a nanostructured surface layer was formed on 1Cr11Ni2W2MoV stainless steel.Group contrastive high cycle fatigue tests were carried out in 1Cr11Ni2W2MoV stainless steel before and after LSP treated.The experimental data was analyzed by mathematical statistics method and the influence mechanism of fatigue properties affected by LSP treatment was also researched.The results indicate that LSP treatment can improve the high cycle fatigue life of 1Cr11Ni2W2MoV stainless steel effectively.The ultra-fine grained surface layer with residual compressive stress and nanostructured surface layer make great contributions to the improvement in fatigue properties of 1Cr11Ni2W2MoV stainless steel.
