在TA-2.5W合金转中对涂层工具寿命和磨损的研究
Bo Hu1, Zhengqing Liu1, Yang Wu2
1College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China.
Materials (Basel, Switzerland)
|April 13, 2024
概括
加工- (Ta-W) 合金是很困难的. 与未涂层或AlTiN涂层工具相比,TiAlN涂层碳化物工具显著延长了工具的寿命,并提高了切割性能.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 部落学 (tribology) 是一个学科.
背景情况:
- - (Ta-W) 合金由于其硬度,强度和可塑性而存在重大加工挑战.
- 这些挑战导致工具磨损加快,工具寿命缩短,加工过程中表面质量受损.
研究的目的:
- 为了评估在Ta-2.5W合金上的不同涂层碳化物工具的加工性能.
- 研究涂层材料 (未涂层,TiAlN,AlTiN) 和切割参数对表面温度,工具寿命和磨损机制的影响.
- 为了确定Ta-W合金加工中占主导地位的磨损模式和机制.
主要方法:
- 使用未涂层碳化物,TiAlN涂层碳化物和AlTiN涂层碳化物工具对Ta-2.5W合金进行实验性加工.
- 在切割过程中监测表面温度和工具寿命.
- 工具磨损特征的分析和磨损机制的识别 (侧面磨损,粘合剂磨损,扩散磨损).
主要成果:
- 侧面磨损是旋转工具上观察到的主要磨损模式.
- 在所有测试的工具类型中,粘合剂和扩散磨损是主要的磨损机制.
- 与AlTiN涂层和未涂层碳化物工具相比,TiAlN涂层工具的磨损较小,使用寿命更长.
结论:
- 涂有TiAlN的碳化物工具在加工Ta-W合金时表现出优异的切削性能.
- 使用TiAlN涂层有效地减轻了工具磨损,延长了工具的使用寿命并提高了加工效率.
- 了解磨损机制对于选择合金加工具有挑战性的最佳工具至关重要.
相关概念视频
Screw: Problem Solving
415
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
To evaluate the...
415
Thin-Walled Hollow Shafts
186
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
186
Abrasion Resistance of Concrete
130
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
130
Design Example: Deciding Thickness of Lubricating Fluid in a Shaft
109
Effective lubrication between a rotating shaft and its bearing housing is essential in rotating machinery to minimize friction, wear, and energy loss. With carefully controlled thickness and viscosity, the lubricant layer prevents metal-to-metal contact, ensuring smooth operation.
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular...
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular...
109
Fatigue
181
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
181
Residual Stresses in Circular Shafts
170
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
170


