对45#钢圆环套筒类支座零件进行调质处理时,发生多个零件圆环内壁出现裂纹.采用ICP光谱仪、光学金相显微镜及宏观特征等手段对裂纹特征进行分析.结果表明:该批零件因热处理淬火前锻造工艺控制不当,锻造温度高,达到该材料的过热、过烧温度,造成显微组织中非金属夹杂物沿晶界分布及混晶、晶粒粗大等缺陷,弱化了晶界,降低材料的强度和韧性;淬火过程中由于热处理残余应力的变化,在几何尺寸小、形变空间也小的内壁形成沿晶扩展的淬火裂纹.
Cracks appeared on the inner wall of ring during thermal refining of 45# steel ring sleeve bearing parts. By using ICP spectrometer and optical microscope,crack characteristics were analyzed. The results indicate that there exists some non?metallic inclusions along crystal boundary,some defects of mixed crystal,coarse grain and so on,because the forging process is not well controlled before quenching,which leads to high forging temperature,reaching superheating and overheating temperature of material. These defects weaken grain boundary,reduce strength and toughness of the material. Due to the variation of residual stress during heat treatment quenching process,some quenching cracks along crystal boundary appear on the inner wall.
参考文献
| [1] | Mochida I.;Shirahama M.;Kawano S.;Hada T.;Seo Y.;Yoshikawa M.;Yasutake A.;Korai Y. .Removal of SOx and NOx over activated carbon fibers[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(2):227-239. |
| [2] | 贺福.碳纤维及其复合材料[M].北京:科学出版社,1997:45-46. |
| [3] | 刘振宇,郑经堂.PAN基活性炭纤维研究及展望[J].化工进展,1998(01):0. |
| [4] | 郑经堂.活性炭纤维[J].新型炭材料,2000(02):80-80. |
| [5] | 袁艳梅,陈长安,张丽,张惠芬,牛快快.活性碳纤维改性技术研究进展[J].化工环保,2009(04):331-334. |
| [6] | Suzuki M .Activated carbon fibei fundamentals and applications[J].Carbon,1994,32(04):577-587. |
| [7] | Macia-Agullo JA;Moore BC;Cazorla-Amoros D;Linares-Solano A .Influence of carbon fibres crystallinities on their chemical activation by KOH and NaOH[J].Microporous and mesoporous materials: The offical journal of the International Zeolite Association,2007(3):397-405. |
| [8] | Ko T H;Chiranairadul P;Lu Chiukuang et al.The effects of activation by carbon dioxide on the mechanical properties and structure of pAN-based activated carbon fibers[J].Carbon,1992,30(04):647-655. |
| [9] | An-Hui Lu;Jing-Tang Zheng .Study of Microstructure of High-Surface-Area Polyacrylonitrile Activated Carbon Fibers[J].Journal of Colloid and Interface Science,2001(2):369-374. |
| [10] | Zhenyu Ryu;Haiqin Rong;Jingtang Zheng;Maozhang Wang;Bijiang Zhang .Microstructure and chemical analysis of PAN-based activated carbon fibers prepared by different activation methods[J].Carbon: An International Journal Sponsored by the American Carbon Society,2002(7):1144-1147. |
| [11] | I.Martin-Gullon;R.Andrews;M.Jagtoyen .PAN-based activated carbon fiber composites for sulfur dioxide conversion: influence of fiber activation method[J].Fuel,2001(7):969-977. |
| [12] | 陆安慧,郑经堂,王茂章.炭分子筛的研究进展[J].化工进展,2001(04):12-13,18. |
| [13] | 陆安慧,郑经堂,王茂章.催化CVD调变PAN-ACF微结构研究[J].高等学校化学学报,2001(09):1546-1550. |
| [14] | 潘高峰,崔鹏.改性活性炭纤维吸附二甲胺水溶液的研究[J].离子交换与吸附,2008(06):544-550. |
| [15] | 黄纯凯,赵鹏,张宏伟.硝酸改性活性炭纤维对镉的吸附性能研究[J].给水排水,2010(z1):37-41. |
| [16] | 易芬云,陈水挟.ACF电极电解处理含NaCl结晶紫染料废水的研究[J].环境工程学报,2010(08):1765-1770. |
| [17] | 陈水挟,罗颖,董国华,曾汉民.活性碳纤维的结构修饰及其吸附氙性能的研究[J].离子交换与吸附,2004(06):481-493. |
| [18] | 程抗,王祖武,左蓉,周烨,车垚,杨毅.等离子体改性对活性炭纤维表面化学结构的影响[J].环境工程,2009(01):100-103,106. |
| [19] | 李晓菁,乔冠军,陈杰瑢.氮等离子体表面改性对ACF吸附性能的影响[J].稀有金属材料与工程,2008(z1):296-299. |
| [20] | 刘汉杰.活性碳纤维有机尾气净化回收技术[J].环境保护,2002(05):12-14. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%