喷

Ultra-high strength 23Co 14Ni 12Cr3MoE steel was shot peened and the surface residual stress of shot-peened specimens was determined during rotating bending fatigue by X-ray diffraction method.The surface residual stress decreases greatly in the first 10 cycles and it is steady alter 100 cycles.

工件表面的残余应力，对其疲劳性能具有重要的影响，喷丸强化工艺主要利用的就是在表层产生一定数值大小的残余压应力以提高疲劳抗力，但喷丸残余压应力在疲劳过程中并不是稳定的，在一定外力或/和温度的单独或共同作用下，残余应力可发生松弛['一5]。

They are FF testing methods, surface treatment technique, evaluation of the properties of surface modification layer, coating induced embrittlement, selection of coating materials, effects of SP and other surface modification on fretting fatigue resistance . A new coating technology combined with shot peening is proved in improving FFR of titanium alloy. The relation between fretting wear and fretting fatigue mechanism of titanium alloy are discussed on the basis of the experimental results. The main contributions are as follows:(1) Shot peening is the most efficient way in improving fretting fatigue resistance of titanium alloys. Working hardening, roughening and compressive residual stress are involved in the shot peened surface.

本文针对上述问题，从影响FF行为的关键环节：FF实验方法、表面处理工艺技术及表层性能评价、镀层引起的钛合金脆化行为、脆化机制及镀层材料的选择、喷丸强化因数和表面涂层对钛合金FF抗力的影响、FF与微动磨损的联系等，深入系统地研究影响钛合金FF抗力的控制因数，探讨FF机理，并通过喷丸形变强化与新型表面镀或渗层合理复合，达到进一步提高钛合金FF抗力的目的。

ABSTRACT Shot peening is an effective method of improving fatigue performance of machine parts.

喷丸是提高机器零件疲劳性能的有效工艺，但是喷丸强化理论还很不完善。

Shot peening was applied to 1Cr13 alloy for different periods of time(5 min,10 min,20 min and 40 min) and the effects of this treatment on the selective oxidation behaviour at 800 ℃ for 100 h have been studied.

对1Cr13钢进行了不同时间(5，10，20，40 min)的喷丸处理，研究了喷丸处理对1Cr13钢在800℃空气中的抗高温氧化性能。

Spray prilling technology using for preparing liquid-phase sintering SiC powders was discussed. The influences of slurry characteristics, temperature and spray press on powder properties were investigated.

阐述了液相烧结SiC陶瓷喷雾造粒过程中的相关制备工艺，研究了装料的特性、干燥温度、喷雾压力等因素对粉体性能的影响。

Three wet back spray booths will be utilized for manual glaze overspraying of repaired ware prior to refiring in the intermittent shuttle kiln.

三个湿式喷橱用于间歇式梭式窑重烧前修补件的人工喷釉。必要情况下，洗面器的背面及坐便器底部可用缩放研磨机磨平。

Dongguan than a company specializing in sandblasting parts of the development, production and marketing, professional services sandblasting the domestic and overseas enterprises.

东莞比成公司专门从事喷砂配件的开发，生产和销售，专业服务国内及海外各喷砂企业。

Now is the first national commitment to environment-friendly sandblasting the design and manufacture of machinery and All the staff of the company's efforts, the environmental aspects of sandblasting machine has achieved fruitful results.

目前也是国内第一家致力于对环保型喷砂机械的设计与制造，并在公司全体人员的努力下，在环保型喷砂机方面取得了丰硕的成果。

Dongguan City is a 100-五金机械厂long-term commitment to sandblasting sand blasting equipment and technology developed by enterprises.

东莞市百通五金机械厂是一家长期致力于喷砂技术及喷砂设备研制的企业。

U.S. liquid and dry sand blasting sandblasting series will meet each user's different needs, for special products of production and technological requirements, we can design and manufacture a variety of specialized equipment to ensure that users receive the economic, efficient and satisfactory Products.

我们的液体喷砂和干式喷砂系列产品将满足每一个用户的不同的需求，对于特殊产品的生产和工艺要求，我们可以设计制造各种专用设备，以保证用户获得经济、高效、满意的产品。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！