Physically-based model for the tempering kinetics of medium carbon martensite

中碳马氏体回火动力学的物理模型

• 批准号: 484789-2015
• 负责人: Zurob, Hatem
• 金额: $ 1.82万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=584534
• 关键词: Physically; based; model; tempering; kinetics

Patriot Forge is a supplier of custom open die and rolled ring forgings for a wide range of industries including power generation, nuclear power, oil & gas and aerospace. A key constituent of steel forgings is the martensite phase. In the as-quenched state martensite offers high strength but low ductility and toughness. In order to restore the toughness of martensite, it is tempered at temperatures in the range from 150-600oC. The strength and ductility of tempered martensite are controlled by the temperature and duration of the tempering treatment as well as the composition of the steel. Patriot Forge utilizes a suite of advanced modelling tools to optimize the forging process and predict the final microstructure and hardness of the forging in the as-quenched state. The above modelling tools can predict the hardness of the as-quenched part, but not the evolution of hardness as a function of tempering conditions. The aim of this work is to develop a software tool which can describe the hardness evolution during tempering under non-isothermal conditions.

Patriot Forge是一家为发电、核电、石油天然气和航空航天等广泛行业提供定制开模和轧制环锻件的供应商。钢锻件的关键成分是马氏体相。在淬火状态下，马氏体提供高强度但低延展性和韧性。为了恢复马氏体的韧性，它在150- 600 ℃的温度范围内回火。回火马氏体的强度和延展性由回火处理的温度和持续时间以及钢的成分控制。Patriot Forge利用一套先进的建模工具来优化锻造工艺，并预测淬火状态下锻件的最终显微组织和硬度。上述建模工具可以预测淬火零件的硬度，但不能预测硬度随回火条件的变化。本工作的目的是开发一个软件工具，可以描述在非等温条件下回火硬度演变。