The effect of yttrium oxide on microstructure, chemical composition and mechanical properties of weld metal was studied and the active mechanism of yttrium oxide was also discussed.
研究了稀土添加剂氧化钇对焊缝微观组织、化学成分以及焊缝金属力学性能的影响，并分析了氧化钇的作用机制。
The influence of chemical composition and heat-treatment on the microstructure and mechanical properties of the steel is investigated.
研究了化学成份和热处理工艺对钢板力学性能和微观组织的影响规律。
The fracture reason of reducer shaft was analyzed by means of morphology and microstructure analysis, chemical composition analysis, mechanical properties test, SEM micro-morphology analysis.
采用宏微观形貌分析、化学成分分析、力学性能测试、SEM微观形貌分析等手段，分析了减速机轴断裂的原因。
The steel's chemical composition and the process parameters influence the mechanical properties of high speed wire.
钢材的化学成分和轧制时的工艺参数影响着高速线材的力学性能。
The paper studies the chemical composition of steel for racing bicycle chain and the mechanical properties after being quenched, then the optimum chemical composition of steel is determined.
对赛车链条用钢的化学成分及调质后的机械性能进行了研究，从而确定了适用赛车链条用钢的最佳化学成分。
This paper briefed chemical composition, microstructure, mechanical properties, resistant corrosion and workabalities of stainless steel C15. The criterion for its application was provided.
扼要地介绍了C15不锈钢的化学成分、显微组织、力学性能、耐腐蚀性能和加工性能，为选材应用提供了判据。
Analysis are made to the rupture and chemical composition, mechanical properties and microstructure of the material.
对其断口、材料的化学成分、力学性能和显微组织进行分析。
The analysis of automobile engine crankshaft was conducted by macroscopic examination, fracture analysis, chemical composition analysis, metallographic examination and mechanical properties test.
通过宏观分析、断口分析、化学成分检验、金相检验和力学性能检测等方法，对汽车发动机曲轴断裂原因进行了分析。
This article has made an approach on the influence of chemical composition, and heat treatment process of high strength cast zinc-base alloy to the mechanical properties and metallography structure.
本文就高强度铸造锌基合金的化学成分、热处理工艺等对力学性能及金相组织的影响进行了探讨。
The production process of pre-stressed SWRH82B wire bar in Xing Steel is introduced, its chemical composition, mechanical properties and micro-structure all meet the standard.
介绍了邢钢预应力SWRH82B盘条的生产工艺，盘条的化学成分、力学性能、显微组织等均达到了标准要求。
After chemical and physical test, on conveyor chain material, it is concluded that the composition and various mechanical properties can meet the standard, except impact toughness at room temperature.
对圆环链母材进行理化检测，证明化学成分和各项力学性能指标均符合要求，只有常温冲击韧性不符合要求。
The mechanical properties, surface morphology, chemical composition and surface cohesion property of UHMPE fiber were studied before and after surface modification.
研究了处理前后uhmpe纤维的力学性能、表面形貌、化学成分、表面粘结性能的变化。
The effect of chemical composition and process parameters on the microstructure and mechanical properties of steel pipes under accelerated-cooling conditions is investigated.
研究了化学成分和生产工艺参数对钢管在线加速冷却后组织、性能的影响。
In this paper the mechanical properties of different kinds of quenched rails were studied. The relationship of mechanical properties, chemical composition and service effects was discussed.
研究了不同淬火钢轨的力学性能，探讨其化学成分、力学性能与使用效果的关系。
The results show that chemical composition, metallographic structure and mechanical properties of steel for the tool joints conform to the API standard and the customer's technical requirement.
结果表明，接头用钢的化学成分、金相组织、机械性能符合API标准及订货技术条件。
Common quality problem occurred in China made steel pipe mainly involved in surface quality, dimension deviation, chemical composition, mechanical properties and quality inspection, etc.
国产钢管常见的质量问题主要表现在表面质量、尺寸偏差、化学成分、力学性能和质检等方面。
In this paper, the fracture surface of a failed axle was examined macroscopically. The chemical composition, mechanical properties, ma-cro-and microstructure of the fracture surface were analysed.
本文对断轴进行了宏观断口检查并对化学成分、力学性能、高低倍组织及微观断口进行了分析。
The mechanical properties of the material are closely related to the chemical composition, heat treatment and casting process.
该材质铸件的力学性能与化学成分选择、热处理工艺和铸造工艺密切相关。
This paper introduces chemical composition, structure, mechanical properties and manufacturing techniques of J55 oil pipe's material.
本文介绍了J 5 5油管材料的化学成分、组织、力学性能以及生产工艺技术。
To find the cause of perforation corrosion in a boiler tube, the chemical composition, mechanical properties, microstructure of tubes, the corrosion product and the water quality have been analyzed.
废热锅炉是合成氨装置的重要设备之一，其炉管与大管板焊缝受高温高压及介质腐蚀，运行一年后会产生裂纹，影响装置的正常运行。
The chemical composition, microstructure and mechanical properties of connecting rod blank made of microalloy steel are analyzed.
研究了国产轿车五气门发动机连杆毛坯锻件与德国毛坯锻件的化学成分、金相组织及力学性能。
The chemical composition, microstructure and mechanical properties of connecting rod blank made of microalloy steel are analyzed.
研究了国产轿车五气门发动机连杆毛坯锻件与德国毛坯锻件的化学成分、金相组织及力学性能。
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