Effects of carburizing time on microstructure and transverse rupture strength of cemented carbide with gradient cobalt structure fabricated by pre-sintering-carburizing process were studied by optical microscopy and transverse rupture strength test. 采用预烧结-后续渗碳的方法制备钴相呈梯度分布的硬质合金,通过对试样显微组织的观察和抗弯强度的测试,研究渗碳时间对梯度硬质合金显微组织和抗弯强度的影响。
The influence of sintering temperature, sintering time and different alloying elements on Liquid phase and the density, hardness as well as transverse rupture strength after sintering was investigated. 研究了烧结温度、保温时间及不同合金元素对铁基材料大液相量(质量分数20~30%)液相烧结及烧结后材料密度、硬度和抗弯强度的影响。
The influence of different raw material iron powder, copper contents in matrix skeleton and different quenching temperatures on the density, hardness and transverse rupture strength of heat-treated copper-infiltrated steel was investigated. 研究了不同原料铁粉、基体骨架铜含量以及不同淬火温度对渗铜钢热处理后密度、硬度和抗弯强度的影响。
Study on the transverse rupture strength of diamond segments 金刚石节块的抗弯强度分析
Results showed that sinter-HIP treatment can enhance the transverse rupture strength of WC-Co cemented carbides effectively. 结果表明:低压烧结工艺可以有效提高硬质合金的抗弯强度;
The bonding conditon achieved by hot-pressing iron-based, nickel-based, copper-based and cobalt-based powders with TiN-coated diamonds has been studied by means of Transverse Rupture Strength ( TRS) testing, SEM and EDAX. 利用抗弯强度试验、扫描电镜及能谱分析研究了镀TiN金刚石在Fe基、Ni基、Cu基及Co基结合剂中的界面结合状态。
When BMD is under 0.6 g/ cm2, the trabecula is destroyed in both transverse and longitudinal orientation, while the collagen fiber emerges the convolution and rupture. 在骨密度<0.6g/cm2时,骨小梁横向和纵向均遭到破坏,骨胶原纤维同时出现卷曲、断裂。
Nano-grained cemented carbides possess a series of excellent mechanical performances such as high transverse rupture strength and high hardness, which can meet the urgent demands in aerospace, information technology, mould and cutting application. 纳米晶硬质合金具有高强度和高硬度等一系列优异的力学性能,可广泛应用于航天、信息、模具、切削刀具等领域。
It was presented that the surrounding structures were thickened as the Mo content increased, the Mo content and the Co/ Ni ratio were the main factors for improving the transverse rupture strength of TiC-based cermet. 试验表明Mo含量的增加使环形相增厚;Mo含量和Co/Ni含量比为抗弯强度的两个主要成分影响因素。
The transverse rupture strength and abrasion ratio of the composite sintered with ion implanted diamond were notably improved as well. 此外,和离子注入前相比,用离子注入后的金刚石烧结的复合材料的抗弯强度和磨耗比也有了较大幅度的提高。
Effects of carburizing time on microstructure and transverse rupture strength of graded cemented carbides 渗碳时间对梯度硬质合金显微组织和抗弯强度的影响
One Case: Transverse Mesocolon Rupture Accompanied by Bleeding Misdiagnosised as Pancreas Injury 横结肠系膜破裂出血误诊为胰腺损伤1例报告
Transverse rupture strength, Rockwell A hardness, magnetic saturation induction and magnetic coercivity of samples sintered in vacuum or by sinter-HIP were measured. 测试了真空烧结和低压烧结试样的抗弯强度、洛氏硬度、磁饱和度和矫顽磁力。
The ductile zone prevents cracks propagation and leads to the increase of the transverse rupture strength. The impact resistance of coated gradient inserts is increased by 1.6 times. 表面韧性区使合金的强度提高,使涂层刀片的抗冲击性能提高1.6倍。
With the development of the sintering process, the density, transverse rupture strength and microhardness of the sintered sample increase, while the electrical resistance gradually decreases. 随着烧结过程的进行,烧结体的密度、横向断裂强度和显微维氏硬度均呈上升趋势,电阻则逐渐降低。
Transverse rupture strength and compressive strength are approximately 910 MPa and 3.04 GPa, respectively. TN30的抗弯强度和抗压强度分别达到910MPa和3.04GPa。
The best components A_2B_3C_1 of TiC-based cermets ( TiC-WC-Cr_3C_2-Co-Ni-Mo) were obtained through orthogonal experiments which were taken the transverse rupture strength ( TRS) as reference index. 通过正交试验法对TiC基金属陶瓷进行成分研究,选取抗弯强度为试验指标,进行极差分析,获得了最佳的TiC-WC-Cr3C2-Co-Ni-Mo金属陶瓷试验配方A2B3C1组合。
Transverse rupture strength of Ni bonded ti ( c, n) cermet and fractal dimension analysis of its fracture surfaces Ni粘结的Ti(C,N)金属陶瓷的横向断裂强度与断口的分形分析
As the increase of Mo content, the hardness of ( Ti, W, Ta) C-Mo-Ni system cermets improved and the transverse rupture strength ( TRS) increased initially and then decreased. 随着Mo含量的增加,(Ti,W,Ta)C-Mo-Ni系金属陶瓷的硬度提高,而抗弯强度先升高后降低。
The creep constitutive model of Nickel-base single crystal superalloy was presented, which based on finite deformation crystallographic constitutive model. The longitudinal and transverse orientation dependence of the rupture life was studied. The influence of orientation on rupture life was got. 在有限变形晶体滑移理论的基础上给出了镍基单晶高温合金蠕变本构模型,对镍基单晶高温合金蠕变持久寿命的取向相关性进行了分析,得到了纵向、横向取向相关性的规律。
Compared to micro-grained alloy, ultrafine-grained and nanocrystalline cemented carbides have much higher hardness, wear resistant, fracture toughness and transverse rupture strength. Therefore, the research on the ultrafine-grained and nanocrystalline WC-Co cemented carbides becomes an important developing direction in the hardmetal industry. 与传统的粗晶硬质合金相比,超细晶WC-Co硬质合金具有更高的硬度、耐磨性、断裂韧性与横向断裂强度,是当今硬质合金行业的重点发展方向。