抽油泵泵筒内表面渗硼组织与性能研究

Boronizing of inside surface of subsurface pump barrel.

采用 45钢试样 ,通过不同工艺参数、渗剂配比的渗硼热处理试验 ,得出B4C∶KBF4∶松散剂∶SiC按 1∶1∶1∶1 7配比再加 4%稀土催渗剂 ,温度为 80 0℃处理 5h的最优化泵筒内表面渗硼处理工艺。渗硼层的相组分为FeB、Fe2 B、Fe3C +Fe3(C ,B) +F ;次表层Fe2 B的硬度大于 1 2 0 0HV0 1 ,比渗碳和镀铬等常规工艺有更优良的耐磨性和耐蚀性。用最优工艺处理整筒管式抽油泵泵筒内表面 ,具有热处理温度低、工件变形小、工艺简单、易于推广等优点。482台渗硼泵的现场推广应用表明 ,油井免修期延长了 1 68天 ,累计创经济效益 390 0万元 。

The optimal boronizing of inside surface of subsurface pump barrel is obtained by test, i.e. the barrel being treated at 800℃ for 5 hours with a compounding ratio of 1∶1∶1∶17(B 4C∶KBF 4∶loosening agent∶SiC) and 4% thulium additive. The microstructure of the boronizing layer is FeB,Fe 2B,Fe 3C+Fe 3(C,B)+F. The sublayer Fe 2B has a hardness higher than 1200HV 01 , therefore possesses better wear resistance and corrosion resistance than carbonized layer and chromium coating. The use of subsurface pump with a barrel treated by the above mentioned technology shows that the pump overhaul period is extended greatly, therefore good financial profits can be obtained.