中铬铸铁可克服高铬铸铁价格高、低铬铸铁脆性大的缺点，具有一定硬度、韧性

中铬铸铁可克服高铬铸铁价格高、低铬铸铁脆性大的缺点，具有一定硬度、韧性和耐磨性，在冶金矿山、火力发电、水泥行业等得到了应用，显示出优良的经济效益和社会效益。但由于中铬铸铁的研究起步较晚，还远没有高铬和低铬铸铁深入广泛，所以目前尚没有系统的技术标准；现有的中铬铸铁也存在许多不足之处，如热处理工艺复杂、基体淬透性差、力学性能和耐磨性不足等，仍需不断完善。
本文以中铬白口铸铁为研究对象，进行奥氏体化热处理，并研究奥氏体化温度和时间对其组织和性能的影响。首先取样研究铸态中铬铸铁的组织和性能，针对铸态组织的特征，然后对试样进行不同温度的等温淬火热处理，并采用不同的保温时间；随后观察了热处理后的试样的组织，探究不同温度及保温时间的等温淬火热处理工艺对其组织和性能的影响，以期获得较高的硬度和较好的韧性。

結果 (中文) 3:

Medium chromium cast iron can overcome the high price of high chromium cast iron and low chromium cast iron brittle faults, has a certain hardness, toughness and wear resistance, in the metallurgical mines, thermal power, cement industry has been applied, showing excellent economic benefit and social benefit. But because of the medium chromium cast iron of a late start, is still far from high chromium and low chromium cast iron is widely and deeply, so there is no system of technical standards; existing medium chromium cast iron also exist many deficiencies, such as heat treatment process is complicated, matrix hardening of poor, mechanical properties and wear resistance of lack of, still need to continue to improve. In this paper,
medium chromium white cast iron as the research object,The effect of austenite temperature and time on the microstructure and properties of the austenite was studied.. First sampling of cast state of medium chromium cast iron microstructure and properties, for casting microstructure characteristics, the specimens were then at different temperatures and isothermal quenching heat treatment, and the different soaking time, then observing the tissue samples after heat treatment, explore the different temperature and holding time of Austempering heat treatment process on the microstructure and properties of, in order to obtain higher hardness and better toughness.