元素Re对Q345B低合金管性能与组织的影响

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ANMo-0.52TiH2-0.08ZrH2-0.03CCHENGFENBILIZHIZAO，BINGBIELIZAITZMZENGJIA1%、3%、5%CHUNLAIFEN，BIELIBIAOJIWEITZM-1、TZM-3HETZM-5。FENMOQIUMO4hHOU，YAZHICHENG 28mm 40mmDEPITI，ANBIDINGDESHAOJIEJISHU，ZAIQINGQIWEIHUFENWEIXIAJINXINGSHAOJIE，DEDAOXIMIDESHAOJIECHENGPIN。

微量稀有金属Re增加到Q345B中后，Re与基体Mo发生固溶，构成具有必定耐性、构造细密的固溶体晶粒。在弯曲开裂时，Mo-Re固溶体以穿晶开裂为主，吸收了很多的开裂能，有用改进了TZM合金的室温耐性。对Q345B低合金管而言，Re的引进抑制了Ti和Zr在Mo中的固溶，致使很多气孔和第二相粒子富集在Q345B低合金管周围，对其强度有晦气影响。