王晓军
,
杨洁
腐蚀与防护
为了解决石油、天然气井口装置在高含硫介质中的强腐蚀问题，以30CrMo钢作采油树的阀体或阀盖材料，在其表面堆焊两层Inconel625镍基合金。采用全浸式均匀腐蚀试验测定堆焊层的腐蚀速率。结果表明，Inconel625镍基合金堆焊层的腐蚀速率约为30CrMo钢的腐蚀速率的1／8，Inconel625镍基合金具有良好的抗硫元素腐蚀性能。
关键词:
30CrMo钢
,
Inconel
,
625镍基合金
,
堆焊
,
均匀腐蚀
FENG Di
,
YE Wujun
,
HAN Guangwei
,
LUO Heli(Central Iron Steel Research Institute
,
Beijing 10008 1
,
China)
金属学报(英文版)
Research work and recent progress made toward the industrial applications of the Ni_3Al in CISRI are discussed in present paper. The development of a Ni_3Al base alloy named MX-246 hardened by carbides and fine dispersion of disordered γ is summaried. This alloy,with higher peak temperature of yield strength and higher strain hardening rate than alloyIC-218,has been successfully used as the material of rolling guider at elevated temperatures and in wear conditions. The Ni3Al base alloy of GH264 has been made into welding electrodes by horizontal continuous casting process, and recently successfully surfacing welded on hydraulic blades as cavitation erosion resistance material. The process of remelting Ni3Al base alloy in air was also developed. The processes of producing welding electrodes and remelting in air set the base of industrial applications of Ni3Al in welding, repairing and casting in mass production and into components of large size. Another application of the compound, manufacturing the jet engine rivets used at about 1300℃ , can be attributed to its excellent oxidation resistance and still keeping high strength up to the melting point.
关键词:
: Ni_3Al
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