| 退火45钢高能冲击载荷下的白层形态及形成机制 |
| |
| 引用本文： | 许云华 袁善良. 退火45钢高能冲击载荷下的白层形态及形成机制[J]. 热加工工艺, 2000, 0(1): 3-4,20 |
| |
| 作者姓名： | 许云华 袁善良 |
| |
| 作者单位： | ：许云华（西安交通大学材料强度国家重点实验室，陕西 西安 710049）;（西安建筑科技大学耐磨材料研究所）;袁善良（上海宝钢冶金建设公司 机械动力公司）;罗勤业（上海宝钢冶金建设公司 机械动力公司） |
| |
| 基金项目： | ：国家自然科学基金资助项目59771048 |
| |
| 摘 要： | 对退火４５钢在高能冲击接触载荷下的白层形态及其形成机制进行了研究。结果表明：高能冲击接触载荷下，白层是高度塑性变形，铁素体晶粒严重细化，渗碳体细化溶解消失的区域，它的形成属于形变细化溶解机制；白层中的铁素体的细化过程为：位错增殖、方向性的位错胞的形成，胞状组织被拉长程度增加、在被拉长的胞状组织中产生新的细小的等轴晶粒；白层中的渗体细化形式主要是剪切断裂细化，溶解，消失。
|
| 关 键 词： | 冲击载荷 白层 碳钢 形变机制 晶粒细化 |
| 文章编号： | 1001-3814(2000)01-0003-02 |
Morphology and Formation Mechanism of White Layer Of 45 Steel Annealed under High Energy Impact Load |
| |
| XU Yun huan ,,YUAN Shan liang ,LUO Qin ye ,ZHU Jin hua. Morphology and Formation Mechanism of White Layer Of 45 Steel Annealed under High Energy Impact Load[J]. Hot Working Technology, 2000, 0(1): 3-4,20 |
| |
| Authors: | XU Yun huan YUAN Shan liang LUO Qin ye ZHU Jin hua |
| |
| Affiliation: | XU Yun huan 1,2,YUAN Shan liang 3,LUO Qin ye 3,ZHU Jin hua 1 |
| |
| Abstract: | Morphology and formation mechanism of white layer of annealed medium carbon steel under high energy impact load were estimated.It is shown that the white layer is intensive plasic deformation area in which ferrite was fragmented seriously and the carbides were fractured and fragmented and then dissolved and disappeared.The results confirm the mechanism of white layer formation are deformation and fragmentation and dissolution mechanism.The fragmentary process of ferrite can be described as follow:dislocation emerging continuously,enlongated dislocation cells appearing,the elongating degree increasing,new small equiaxed dislocation coming into being,enlongated crystallines breaking into subgrains.The carbides are fractured and fragmented in form of shear fracture mainly and then dissolved and disappeared. |
| |
| Keywords: | impact load the white layer fracture fragmentation dissolution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
