论文部分内容阅读
研究了一种有优良的耐氯化物腐蚀性能和良好的冷热加工性能及一定的物理、机械性能的00Cr_(20)Ni_(45)Mo_(12)弹性合金。合金成分:≤0.03C、44.5～46.5％Ni、18—20％Cr、11～13％Mo、余Fe,以及Mn、Ti、Al、稀土等微量元素。合金经固溶处理后在 10％FeCl_3·6H_2O溶液中临界点蚀温度(C.P.T)约100℃;临界缝隙(6个缝隙)腐蚀温度(C.C.T)为35℃;在45％MgCl_2沸(155±1℃)U—型弯曲应力腐蚀试验中2656小时未裂。用本合金做膜盒制成0.5级单法兰液位变送器,现场考核使用寿命已达13个月以上,完全满足纯碱生产中测量仪表用弹性敏感元件的要求。合金制成弹性敏感元件,主要用于含有氯化物的介质中,此外,合金在一定浓度和温度的硫酸、硝酸、醋酸和磷酸中也有良好的耐腐蚀性能,可以扩大应用。
A kind of 00Cr_ (20) Ni_ (45) Mo_ (12) elastic alloy with good resistance to chloride corrosion, good hot and cold processing properties and certain physical and mechanical properties was studied. Alloy composition: ≤ 0.03C, 44.5 ~ 46.5% Ni, 18-20% Cr, 11 ~ 13% Mo, Fe, and Mn, Ti, Al, rare earth and other trace elements. After solution treatment, the critical pitting temperature (CPT) was about 100 ℃ in 10% FeCl 3 · 6H 2 O solution and 35 ℃ in the critical gap (6 slits) ℃) U-type bending stress corrosion test 2656 hours did not crack. The alloy membrane box made 0.5 level single-flange liquid level transmitter, on-site examination of the service life of up to 13 months or more, fully meet the soda production of flexible measuring instruments with flexible sensor requirements. The alloy is made of elastic sensitive element and is mainly used in the medium containing chloride. In addition, the alloy also has good corrosion resistance in a certain concentration and temperature of sulfuric acid, nitric acid, acetic acid and phosphoric acid, and can be expanded in application.