| 精铸热锻模具的脆性断裂 |
| |
| 引用本文： | 崔向红,姜启川,王树奇. 精铸热锻模具的脆性断裂[J]. 吉林大学学报(工学版), 2004, 34(4): 527-531 |
| |
| 作者姓名： | 崔向红 姜启川 王树奇 |
| |
| 作者单位： | 吉林大学,材料科学与工程学院,吉林,长春,130022 |
| |
| 基金项目： | 国家计划委员会产业化前期关键技术与成套设备研制开发资助项目(1999317). |
| |
| 摘 要： | 指出了精铸热锻模具脆性断裂主要是由于材料和工艺不完善造成的。通过优化材质及工艺基本可以消除脆性断裂。早期脆性断裂现象大多由于热处理及操作不当所致;冲击疲劳断裂是常见的脆性断裂现象,是由于模具制造缺陷(如砂眼、显微裂纹等)以及热疲劳裂纹作为疲劳裂纹源扩展后所致。
|
| 关 键 词： | 材料表面与界面 精铸 热锻模具 脆性断裂 冲击疲劳 |
| 文章编号： | 1671-5497(2004)04-0527-05 |
| 收稿时间： | 2004-02-24 |
| 修稿时间： | 2004-02-24 |
Brittle fractures in hot-forged cast dies |
| |
| CUI Xianghong,JIANG Qichuan,WANG Shuqi. Brittle fractures in hot-forged cast dies[J]. Journal of Jilin University:Eng and Technol Ed, 2004, 34(4): 527-531 |
| |
| Authors: | CUI Xianghong JIANG Qichuan WANG Shuqi |
| |
| Abstract: | The mechanism of brittle fracture of hot-forged cast dies was discussed and the effective solutions were put forward. The brittle fracture of hot-forged cast dies was attributed to imperfection of materials and processes, which results in unstable lifespan. Through optimizing materials and processes, brittle fractures can be avoided. The early brittle fracture seldom occurs, which is resulted from abnormal heat treatment and operation. Impact fatigue fracture is the dominant pattern in brittle fractures of cast die which is caused by the fabrication defects, such as sand inclusion, micro-crack and thermal fatigue crack, which are taken as initiated crack to propagate to fracture. |
| |
| Keywords: | material surface and interface precision cast hot-forged die brittle fracture impact fatigue |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《吉林大学学报(工学版)》浏览原始摘要信息 |
|
点击此处可从《吉林大学学报(工学版)》下载全文 |
