2年自然时效对超压强化铜管爆破压力的影响  

EFFECT OF TWO YEARS NATURAL AGING ON BURST PRESSURE OF OVER-PRESSURE COPPER TUBE

作　　者：杨帆[1] 骆峰[1] 刘兵[1] 张红卫[1] 范有雄[1] 刘小宁[1] YANG Fan;LUO Feng;LIU Bing;ZHANG HongWei;FAN YouXiong;LIU XiaoNing(School of Mechanical Engineering,Wuhan Vocational College of Software and Engineering,Wuhan 430205,China)

机构地区：[1]武汉软件工程职业学院机械工程学院,武汉430205

出　　处：《机械强度》2023年第2期357-365,共9页Journal of Mechanical Strength

基　　金：湖北省教育厅科研项目(B2021493);武汉黄鹤英才(教育)计划资助。

摘　　要：为分析铜管室温超压强化效果的稳定性,在自然时效时间分别为0个月、6个月、12个月与24个月后,对室温超压强化小直径软态TP2铜管进行了爆破试验研究。结果表明:相同的预处理压力时,小直径软态TP2铜光管与铜内螺纹管,在自然时效时间为0个月、6个月、12个月与24个月的实测爆破压力均值没有显著变化,且其标准差有逐步变小的趋势,表明室温超压强化效果的稳定性好;相同的自然时效时间时,预处理压力分别为4.60 MPa与16.50 MPa的小直径软态TP2铜管实测爆破压力有显著不同,随着预处理压力的升高,实测爆破压力的均值显著变大和标准差显著变小,表明预处理压力大小对强化效果有比较大的影响,预处理压力大可以得到更好的强化效果;如果自然时效时间不超过24个月,对于经过相同超压强化处理的相同小直径软态TP2铜管,其爆破压力符合正态分布;室温超压强化处理是提高软态TP2铜管爆破压力的合适方法,可用于工程实践。To study the stability of the over-pressure reinforcement effect of the copper tube at room temperature,the burst tests for the small diameter soft TP2 copper tube at room temperature during the natural aging time of 0,6,12 and 24 months were carried out respectively.These results indicated that:the mean of the measured burst pressure did not change significantly for small diameter soft TP2 copper bare tube and rifled tube at the same pretreatment pressure during the natural aging time of 0,6,12 and 24 months,respectively.The standard deviation was gradually smaller and the over-pressure strengthening effect was obvious.The measured burst pressure was different obviously for small diameter soft TP2 copper tube at the pretreatment pressure was 4.60 MPa and 16.50 MPa respectively during the same natural aging time,the mean was significantly larger and standard deviation was significantly smaller for measured burst pressure with the increase of pretreatment pressure,the results showed that pretreatment pressure had a great influence on strengthening effect,and higher pretreatment pressure could get better strengthening effect.The burst pressure conforms to the normal distribution for the same small diameter soft TP2 copper tube at the same over-pressure reinforcement during the natural aging time shall not exceed 24 months.Over-pressure reinforcement at room temperature was a suitable method to increase burst pressure of soft TP2 copper tube,and the method could be used in engineering.

关 键 词：自然时效 小直径 TP2铜管 超压强化 爆破压力 稳定性 

分 类 号：TH142.3[一般工业技术—材料科学与工程]