结果表明，由于球化不良而产生的不均匀带状碳化物是造成气门电镦质量问题的重要因素之一。
The results show that the uneven distribution banded carbide due to abnormal spheroidization is one of important factors causing the quality problems of the valves after electric upsetting.
以170f柴油机为例，建立单质量、二质量和四质量三种配气机构动力学模型，并相应进行气门动态特性试验研究。
A 170f diesel valve train was taken as example, one-mass, two-mass and four-mass models were built and the valve dynamic characteristics experiment was also carried out accordingly.
济南航发气门有限公司的诚信、实力和产品质量获得业界的认可。
Jinan air hair valve co., LTD. The good faith, the strength and the product quality in the industry for approval.
根据研究数据，激光熔覆技术应用于气门密封面生产将进一步提高质量。
According to the test data, the quality of locomotive valve by laser cladding will be better.
用该炉进行气门的离子渗氮，其硬度、表面质量和尺寸精度均能达到产品的技术要求。
The hardness, surface quality and size precision of gas valves treated by above double heating...
湖北三环在气门生产能力、设计开发能力、工艺与制造技术、质量保证、客户服务等各个方面处于国内一流水平。
On the other hand, Tri-Ring is one of leading local valve manufacturers in China in fields like production ability, design, manufacturing process technology, quality assurance and customer service.
统计数据表明，由于气门的质量原因引起的发动机失效问题占总原因的百分之五十以上。
The statistical data indicates that the reasons causing the failure of engine due to the quality of valve are above 50 percent of all.
经过对产品图纸、现生产手段进行综合分析，通过改进气门座尺寸要求，改进加工工艺方法，有效地解决了这一关键质量问题。
By analysis of drawings, machining measures, this key problem is solved effectively through improving the requirement of valve seat size and machining techniques.
针对发动机装配现场装配气门油封存在的问题，设计了专用的气门油封装配机，提高装配质量和生产效率。
Aiming at the problem in assembling oil seal for air valve of engines, it is designed a special assembler for the work. Thus, assembling quality and production efficiency is improved.
本文运用电子扫描、金相分析、硬度测量等方法对气门阀热镦模的早裂进行了失效分析，探讨了模具的失效机理，提出了改善模具质量、提高模具使用寿命的途径。
In this paper, the failure of hot-work valve die is analysed with SEM, optical microscope and hardometer. The crack mechanism is explained and some methods are presented to prolong the die-durability.
本文运用电子扫描、金相分析、硬度测量等方法对气门阀热镦模的早裂进行了失效分析，探讨了模具的失效机理，提出了改善模具质量、提高模具使用寿命的途径。
In this paper, the failure of hot-work valve die is analysed with SEM, optical microscope and hardometer. The crack mechanism is explained and some methods are presented to prolong the die-durability.
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