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Wear Resistance of High C High Si Steel with Low Retained Austenite Content and Kinetically Activated Bainite
Metals ( IF 2.9 ) Pub Date : 2020-05-21 , DOI: 10.3390/met10050672
Bojan Podgornik , Mihael Brunčko , Peter Kirbiš

A novel high C high Si carbide free bainitic steel was developed for the production of cold work tools, knives, and rolls, requiring high hardness, toughness, as well as abrasive/adhesive wear resistance and resistance to galling at low costs. The steel was tribologically tested in dry sliding conditions under abrasive and adhesive wear mode, facilitated by using alumina and bearing steel ball as a counter-material, respectively. It was determined that carbide dissolution occurs under high contact pressures, thereby enriching the surrounding matrix with carbon and locally increasing the retained austenite content. The high retained austenite at the sliding interface increases the steels work hardening capacity and promotes superior wear resistance when compared to much more alloyed cold work tool steel, such as AISI D2. The steel has a high resistance to galling as determined by sliding against a soft steel bar due to its chemical composition.

中文翻译:

低残留奥氏体含量和运动活化贝氏体的高碳高硅钢的耐磨性

开发了一种新型的高碳高碳化硅无贝氏体钢,用于生产冷作工工具,刀具和辊,需要低成本,高硬度,高韧性,耐磨性和粘附性以及耐磨损性。通过分别使用氧化铝和轴承钢球作为辅助材料,在干燥滑动条件下以磨料和粘合剂磨损模式对钢进行了摩擦学测试。已确定碳化物在高接触压力下发生溶解,从而使周围的基质富含碳,并局部增加了残余奥氏体含量。与更多合金化的冷作工具钢(如AISI D2)相比,滑动界面处的高残留奥氏体提高了钢的加工硬化能力并提高了耐磨性。
更新日期:2020-05-21
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