A TiA1N coating was deposited on a heat resistant steel X12CrMoWVNbN10-1-1 by vacuum arc ion plating. The tensile and fatigue properties of the coated steel were investigated at room temperature （RT） and 650 ℃. The...A TiA1N coating was deposited on a heat resistant steel X12CrMoWVNbN10-1-1 by vacuum arc ion plating. The tensile and fatigue properties of the coated steel were investigated at room temperature （RT） and 650 ℃. The results reveal that the TiA1N coating is compact, on which a small number of large particle and pits are present. The Ti/Al atomic ratio in the coating is about 0.94. The average hardness of the coating is 1 868 HV0.1 and the interface bonding force between TiAIN coating and the substrate is about 3 l N. The elastic modulus and the strength of the steel are improved by the deposition of TiAIN coating. The influence of the TiA1N coating on the tensile properties of the steel can be ignored at both RT and 650 ℃. Moreover, there is no obvious decrease of the fatigue limit of substrate when the steel is coated by the coating at the investigated temperature.展开更多
采用阴极电弧蒸镀在WC-Co硬质合金基体上沉积Ti_(0.45)Al_(0.55N)、Ti_(0.35)Al_(0.55)Si_(0.1)N和Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层,并在900℃下对涂层试样真空退火30 min和120 min。采用X射线衍射仪和显微维氏硬度计分析比较退火前后...采用阴极电弧蒸镀在WC-Co硬质合金基体上沉积Ti_(0.45)Al_(0.55N)、Ti_(0.35)Al_(0.55)Si_(0.1)N和Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层,并在900℃下对涂层试样真空退火30 min和120 min。采用X射线衍射仪和显微维氏硬度计分析比较退火前后涂层的物相及硬度,研究Si、Cr的加入对Ti Al N涂层热稳定性能的影响。结果表明:在Ti Al N涂层中加入Si、Cr后涂层的硬度增加。900℃退火后,Ti_(0.45)Al_(0.55)N涂层的硬度逐渐下降,Ti_(0.35)Al_(0.55)Si_(0.1)N和Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层的硬度则呈上升趋势,并且Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层的硬度始终保持最高,而Ti_(0.45)Al_(0.55)N涂层的硬度最低。Si、Cr的加入能推迟涂层退火过程中软质的密排六方Al N相的形成,Cr还能延缓面心立方(TiAl)N相的调幅分解。Si、Cr的加入有效改善TiAlN涂层的热稳定性能,Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层的热稳定性优于Ti_(0.35)Al_(0.55)Si_(0.1)N。展开更多
高速铣削过程中,刀具材料对刀具的切削性能有着非常重要的影响。通过对结构参数经过优化的三种不同材料立铣刀(未涂层硬质合金立铣刀、微米金刚石涂层立铣刀、氮铝钛(Ti Al N)涂层立铣刀)加工车体铝合金型材(具有典型的薄壁及斜筋结构)...高速铣削过程中,刀具材料对刀具的切削性能有着非常重要的影响。通过对结构参数经过优化的三种不同材料立铣刀(未涂层硬质合金立铣刀、微米金刚石涂层立铣刀、氮铝钛(Ti Al N)涂层立铣刀)加工车体铝合金型材(具有典型的薄壁及斜筋结构)的切削性能对比,从而确定优选的车体铝合金型材高速铣削立铣刀的材料类型。试验结果显示,氮铝钛(Ti Al N)涂层立铣刀加工过程中的切削力较小,为优选的涂层材料。展开更多
在相同材质刀片基体上分别涂覆不同种类的PVD涂层制成试验刀片。采用光学显微镜、扫描电子显微镜SEM及能谱仪EDS等对刀片涂层进行对比分析,用试验刀片分别对2Cr13不锈钢进行高速干式铣削试验,分析各涂层对刀片磨损形貌及其损坏机理的影...在相同材质刀片基体上分别涂覆不同种类的PVD涂层制成试验刀片。采用光学显微镜、扫描电子显微镜SEM及能谱仪EDS等对刀片涂层进行对比分析,用试验刀片分别对2Cr13不锈钢进行高速干式铣削试验,分析各涂层对刀片磨损形貌及其损坏机理的影响,对比各刀片的切削寿命,以优选出最佳涂层。分析结果表明,未涂层的刀片寿命最低,Ti Si N/Ti Al N涂层为最佳涂层,Ti Al Si N涂层刀片高温性能较好,双层结构Al Ti N涂层较Ti Al Cr N涂层和单层Al Ti N涂层表现出更好的耐磨性和高温性能。展开更多
基金Funded by National Science Foundation of China(No.51172182)the Program for New Century Excellent Talents in University(No.NCET-08-0460)the 111 Project(No.B08040)
文摘A TiA1N coating was deposited on a heat resistant steel X12CrMoWVNbN10-1-1 by vacuum arc ion plating. The tensile and fatigue properties of the coated steel were investigated at room temperature （RT） and 650 ℃. The results reveal that the TiA1N coating is compact, on which a small number of large particle and pits are present. The Ti/Al atomic ratio in the coating is about 0.94. The average hardness of the coating is 1 868 HV0.1 and the interface bonding force between TiAIN coating and the substrate is about 3 l N. The elastic modulus and the strength of the steel are improved by the deposition of TiAIN coating. The influence of the TiA1N coating on the tensile properties of the steel can be ignored at both RT and 650 ℃. Moreover, there is no obvious decrease of the fatigue limit of substrate when the steel is coated by the coating at the investigated temperature.
文摘采用阴极电弧蒸镀在WC-Co硬质合金基体上沉积Ti_(0.45)Al_(0.55N)、Ti_(0.35)Al_(0.55)Si_(0.1)N和Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层,并在900℃下对涂层试样真空退火30 min和120 min。采用X射线衍射仪和显微维氏硬度计分析比较退火前后涂层的物相及硬度,研究Si、Cr的加入对Ti Al N涂层热稳定性能的影响。结果表明:在Ti Al N涂层中加入Si、Cr后涂层的硬度增加。900℃退火后,Ti_(0.45)Al_(0.55)N涂层的硬度逐渐下降,Ti_(0.35)Al_(0.55)Si_(0.1)N和Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层的硬度则呈上升趋势,并且Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层的硬度始终保持最高,而Ti_(0.45)Al_(0.55)N涂层的硬度最低。Si、Cr的加入能推迟涂层退火过程中软质的密排六方Al N相的形成,Cr还能延缓面心立方(TiAl)N相的调幅分解。Si、Cr的加入有效改善TiAlN涂层的热稳定性能,Ti_(0.3)Al_(0.55)Cr_(0.15)N涂层的热稳定性优于Ti_(0.35)Al_(0.55)Si_(0.1)N。
文摘高速铣削过程中,刀具材料对刀具的切削性能有着非常重要的影响。通过对结构参数经过优化的三种不同材料立铣刀(未涂层硬质合金立铣刀、微米金刚石涂层立铣刀、氮铝钛(Ti Al N)涂层立铣刀)加工车体铝合金型材(具有典型的薄壁及斜筋结构)的切削性能对比,从而确定优选的车体铝合金型材高速铣削立铣刀的材料类型。试验结果显示,氮铝钛(Ti Al N)涂层立铣刀加工过程中的切削力较小,为优选的涂层材料。
文摘在相同材质刀片基体上分别涂覆不同种类的PVD涂层制成试验刀片。采用光学显微镜、扫描电子显微镜SEM及能谱仪EDS等对刀片涂层进行对比分析,用试验刀片分别对2Cr13不锈钢进行高速干式铣削试验,分析各涂层对刀片磨损形貌及其损坏机理的影响,对比各刀片的切削寿命,以优选出最佳涂层。分析结果表明,未涂层的刀片寿命最低,Ti Si N/Ti Al N涂层为最佳涂层,Ti Al Si N涂层刀片高温性能较好,双层结构Al Ti N涂层较Ti Al Cr N涂层和单层Al Ti N涂层表现出更好的耐磨性和高温性能。
