台子山隧道衬砌开裂病害的处治

简要介绍了台子山隧道衬砌开裂变形,在对其病害产生原因的调查和分析,制定了有针对性的处治方案。经过处治后,隧道的病害基本得到了遏制,取得了较好的效果。     

某高速公路隧道工程病害处治

简要分析了某高速公路隧道在运营过程中出现路面裂缝和鼓包、衬砌裂缝、电缆沟鼓包等病害成因,结合现场病害状况,拟定具体的病害处理方案,成功地对该病害进行了处治。     

Luster Polish Strengthening Treatment for Raceway Surface of Aeroengine Bearings

A new surface strengthening technology, luster polish strengthening treatment, was proposed to treat the raceway surface of aeroengine bearings (9Cr18Mo) with the centrifugal strengthening machine exclusively designed for luster polish strengthening treatment. The experimental results showed that luster polish strengthening treatment produced a compressive residual stress layer with a depth of over 80 μm below the surface of the bearing raceway, and thus effectively removed the metamorphic layer in the raceway surface. After luster polish strengthening treatment, the average surface hardness of the aeroengine bearing raceway was increased from 61.02 HRC to 63.01 HRC, the surface roughness was reduced from 0.06 μm to 0.03 μm, and the contact fatigue life of the aeroengine bearings was improved by about 90%, with the dispersion of fatigue life being reduced remarkably. Theoretical calculation result agrees with that obtained by experiment.     

表面工程技术在车用发动机上的应用

介绍了各种表面工程技术的原理和方法 ,综述了有关表面工程技术在车用发动机制造和维修领域的研究和应用进展。