| 爆炸处理消除不锈钢焊接残余应力的研究 | |
| 李荣锋 | |
| Subtype | 硕士 |
| Thesis Advisor | 陈亮山 |
| 1991 | |
| Degree Grantor | 中国科学院金属研究所 |
| Place of Conferral | 中国科学院金属研究所 |
| Abstract | 不锈钢的残余应力消除是一个世界性的难题，热处理消除应力退火很难兼顾应力消除程度、耐蚀性与机械性能损伤的关系，本文用14mm厚的18－8Ti不锈钢对接试板采用爆炸处理进行了试验，研究发现合适的爆炸处理具有消除不锈钢焊接残余应力的显著效果，大大提高了焊接件的抗应力腐蚀破坏能力，延长了构件的使用寿命，并且不损伤材料的机械性能。因此，爆炸处理将是目前不锈钢消除残余应力的最有效手段。同时也探讨了小孔法测定不锈钢焊接残余应力的应用性及不锈钢残余应力的大小和分布等方面的问题。实践证明只要选择合适的应变花与钻头配合，测定不锈钢焊接残余应力，小孔法仍有很好的实用性。 |
| Other Abstract | Relieving residual stresses of stainless steel welded constructure is a worldwide difficult problem. It is hard for heat treatment to give consideration to effect of relieving residual stress, damage of resistance against corrosion and mechanical properties simultaneously. The explosion treatment was carried out on 14mm thick butt-welded A321 stainless steel plates. The experimental results show that about 80 percent of welding tensile residual stresses is eliminated. Therefore, resistance against stress corrosion cracking (SCC) is improved remarkably, and service life is elonged a lot. It was affirmed that this process has no harmful influence on mechanical properties of stainless steel. So explosion treatment is coming to be the most effective method of relieving welding residual stress in stainless steel weldments. Magnitude and distribution of residual stresses of stainless steel as well as feasibility of hole-drilling method for stress measurement were discussed. It was affirmed that this method is suitable for residual stress measurement of stainless steel if rosette of strain gage is matched with hole diameter appropriately. |
| Pages | 66 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/17502 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | 李荣锋. 爆炸处理消除不锈钢焊接残余应力的研究[D]. 中国科学院金属研究所. 中国科学院金属研究所,1991. |
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