动态再结晶模型的有限元分析和GCr15轴承钢热热变形过程的微结构演变
Xuewen Chen1, Jiawei Sun1, Yisi Yang1
1School of Materials Science and Engineering, Henan University of Science and Technology, 263 Kaiyuan Avenue, Luoyang 471023, China.
Materials (Basel, Switzerland)
|July 14, 2023
概括
热热成型的GCr15轴承钢精细化了颗粒大小,并提高了机械性能. 开发的模型准确地预测了关键应变和动态再结晶,有助于在轴承比赛生产中控制微结构.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 金工业是金工业的一个方面.
背景情况:
- 热热成型与冷热成型相比,具有优势,降低了变形阻力和表面脱碳.
- 在微观上,热热成型细化了粒粒大小并增强了机械性能.
- GCr15轴承钢是轴承比赛的关键材料,需要优化成型工艺.
研究的目的:
- 在热热成型过程中为GCr15轴承钢建立关键应变和动态再结晶模型.
- 用实验数据和数值模拟来验证这些模型的准确性.
- 为了提供有限元分析和微结构控制在轴承比赛制造的理论基础.
主要方法:
- 使用Gleeble-1500D系统在600-1050°C的温度下进行同热压缩试验,应变速率为0.01-5s-1.1.
- 基于实验数据的临界应变和动态再结晶模型的开发.
- 将动态再结晶模型集成到Forge® 3.2软件中进行数值模拟.
主要成果:
- 建立了一个具有高预测精度 (R=0.986) 的动态再结晶模型.
- 数字模拟准确地预测了不同变形区的颗粒大小,相对于金属学测量,相对误差为5.75%.
- 开发的模型被验证为GCr15轴承钢的热热变形.
结论:
- 已建立的临界应变和动态再结晶模型准确地代表了GCr15轴承钢的热热成型.
- 这些模型对于有限元方法分析和微结构控制在轴承生产中至关重要.
- 热热成型提供了一种可行的方法来提高轴承部件的质量和性能.
相关概念视频
Temperature Dependent Deformation
174
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
174
Mechanical Characteristics of Steel
607
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...
607
Stress-Strain Diagram - Ductile Materials
854
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
854
Recrystallization: Solid–Solution Equilibria
1.1K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
1.1K
Thermal Strain
2.0K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
2.0K
Plastic Deformation in Circular Shafts
209
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
209


