喷雾特征参数对超高强度钢对化碳合金的摩擦系数的影响
Bangfu Wu1, Minxiu Zhang1, Biao Zhao1
1National Key Laboratory of Science and Technology on Helicopter Transmission, College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Materials (Basel, Switzerland)
|October 16, 2024
概括
与空气原子化 (AACF) 相比,切削液的超声波原子化 (UACF) 在加工超高强度钢时显著减少摩擦并改善表面质量. 这种增强的冷却方法提高了工具寿命和加工效率.
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:
- 超高强度钢对航空至关重要,但加工时会因摩擦而造成严重的工具磨损.
- 有效的冷却对于工具的寿命和加工性能至关重要.
- 在不同的冷却条件下对摩擦行为的理解有限.
研究的目的:
- 为了研究超高强度钢的工具工件接口上的摩擦行为.
- 为了比较空气原子化切割液 (AACF) 和超声波原子化切割液 (UACF) 的有效性.
- 分析喷雾特征参数对粘附摩擦系数的影响.
主要方法:
- 在不同的空气压力下,AACF和UACF的评估喷雾特性参数 (滴子大小,密度,速度).
- 使用超高强度钢和化碳化物进行了不连续的滑动试验.
- 研究了喷雾参数与粘附摩擦系数之间的关系.
主要成果:
- 超声波原子化 (UACF) 显著改善了滴滴大小分布的均性.
- 增加的空气压力提高了AACF和UACF的滴滴数密度和速度.
- 与AACF相比,UACF将粘附摩擦系数降低了4.7%9.8%.
- 液体薄膜厚度高度依赖于喷雾特性参数.
结论:
- 对于加工超高强度钢材,UACF提供了一种卓越的冷却方法.
- 优化UACF的喷雾特性导致液体薄膜更厚,减少摩擦.
- 这项研究提供了关于优化切割液原子化的见解,以提高加工效率和工具寿命.
相关概念视频
01:23Abrasion Resistance of Concrete
107
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...
107
01:21Characteristics of Dry Friction
509
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
509
01:18Mechanical Characteristics of Steel
400
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
400
01:15Fineness of Cement
120
The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
Direct...
Direct...
120
01:07Frictional Force
7.8K
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
7.8K
01:20Strength of Cement
126
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
126