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68铜管古
H68黄铜管夹开裂分析
H68黄铜管夹开裂分析
H6 8黄铜管夹安装数月后出现开裂。对开裂的管夹进行了化学成分、力学性能、断口及金相组织的检验与分析。结果表明 ,由于管夹成形时存在的残余应力和成形模具的设计问题而造成的装配应力 ,再加上管夹在露天放置受到的环境腐蚀 ,导致管夹在同一外侧呈现应力腐蚀开裂特征。提出了改进措施 ,并取得了满意的效果
ASTMB68-02光亮退火的无缝铜管
Designation: B 68 –02 Standard Speci?cation for Seamless Copper Tube, Bright Annealed 1 This standard is issued under the ?xed designation B 68; the number immediately following the designation indicates the year of original adoption or, in the caseof revision, the year of last revision. A number in parenthesesindicates the year of last reapproval. A superscript epsilon (e) indicates an editorial