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   冲击疲劳试验 在 金属学及金属工艺 分类中 的翻译结果: 查询用时:0.644秒
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冲击疲劳试验
相关语句
  impact fatigue test
    Abstract The paper describes the forging technology of the grinding balls of high carbon structral steel,the metallographic texture of 50 and 80mm grinding balls and the falling-ball impact fatigue test results which are analyzed and discussed at the end of the paper.
    本文介绍了高碳结构钢锻造磨球的工艺,50、80mm磨球金相组织及落球冲击疲劳试验结果。 文末对其进行了分析与讨论。
短句来源
    The effect of RE modification and heat treatment on impact fatigue property of low chromium cast semi steel was studied by means of impact fatigue test.
    利用冲击疲劳试验 ,研究了稀土变质及热处理对低铬半钢抗冲击疲劳性能的影响。
短句来源
    The morphology of carbides, as well as the generation and propagation of fatigue cracks in wear-resistant white cast iron after impact fatigue test were observed by means of optical microscopy and scanning electron microscopy, and the relationship between the content of RE (rare earths) in the wear-resistant white cast iron and the heating temperature as well as the length and propagation speed of the fatigue cracks were determined.
    采用金相显微镜、扫描电镜观察了经冲击疲劳试验后耐磨铸铁中碳化物的形貌、疲劳裂纹的萌生与扩展,测定了稀土含量及加热温度与裂纹的长度和裂纹扩展之间的关系曲线,在此基础上探讨了稀土变质及热处理对耐磨铸铁冲击疲劳性能的影响。 结果表明:稀土能推迟裂纹萌生的时间,降低裂纹扩展速率,提高其冲击疲劳抗力。
短句来源
  impact fatigue test
    Abstract The paper describes the forging technology of the grinding balls of high carbon structral steel,the metallographic texture of 50 and 80mm grinding balls and the falling-ball impact fatigue test results which are analyzed and discussed at the end of the paper.
    本文介绍了高碳结构钢锻造磨球的工艺,50、80mm磨球金相组织及落球冲击疲劳试验结果。 文末对其进行了分析与讨论。
短句来源
    The effect of RE modification and heat treatment on impact fatigue property of low chromium cast semi steel was studied by means of impact fatigue test.
    利用冲击疲劳试验 ,研究了稀土变质及热处理对低铬半钢抗冲击疲劳性能的影响。
短句来源
    The morphology of carbides, as well as the generation and propagation of fatigue cracks in wear-resistant white cast iron after impact fatigue test were observed by means of optical microscopy and scanning electron microscopy, and the relationship between the content of RE (rare earths) in the wear-resistant white cast iron and the heating temperature as well as the length and propagation speed of the fatigue cracks were determined.
    采用金相显微镜、扫描电镜观察了经冲击疲劳试验后耐磨铸铁中碳化物的形貌、疲劳裂纹的萌生与扩展,测定了稀土含量及加热温度与裂纹的长度和裂纹扩展之间的关系曲线,在此基础上探讨了稀土变质及热处理对耐磨铸铁冲击疲劳性能的影响。 结果表明:稀土能推迟裂纹萌生的时间,降低裂纹扩展速率,提高其冲击疲劳抗力。
短句来源
  “冲击疲劳试验”译为未确定词的双语例句
    Application of Impact-fatigue Test to High Chromium Cast Iron
    冲击疲劳试验在高铬铸铁研究中的应用
短句来源
    Laser melting experiments were carried out on the CO_2 laser(HGL—90),the repeated impact experiments were carried out on self making repeated impact machine.
    在HGL—90型5kw横流CO_2激光器上进行熔覆加工,并在自制的多冲碰撞疲劳试验机上进行多次冲击疲劳试验
短句来源
    To investigate the application of impact-fatigue test for the search of brittle materials,the experimental data include the repeated times of impact-fatigue, shock ductile, hardnessand abrasion are regressed with liner relation. The result show that small energy repeatedimpact-fatigue test is appropriate for measuring the ductile of brittle materials.
    为了探讨冲击疲劳试验在脆性材料研究中的应用,本研究对冲击疲劳次数、冲击韧性和硬度、磨损量的试验数据进行线性回归分析,结果表明,小能量多次冲击疲劳试验更能衡量脆性材料的韧性。
短句来源
    The impact fatigue tests show that the tufftride process has a bad influance on impact fatigue properties of materials.
    同时,冲击疲劳试验表明:软氮化处理使冲击疲劳性能劣化,这是因表面硬化层约束了柔软心部,使整体材料的韧性变差的结果。
短句来源
    lt is proved that the impact fatigue of the Cr-Ti coating is preferable to that of single carbide coating.
    经冲击疲劳试验证实,铬钛碳化物复合涂层的抗冲击疲劳性能优于单一的碳化物层。
短句来源
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  impact fatigue test
Almost all of the UHMW LPE materials perform equally well in the present impact fatigue test.
      
An impact fatigue test has been designed for studying the repeated biaxial impact load response of polymers.
      
  impact fatigue test
Almost all of the UHMW LPE materials perform equally well in the present impact fatigue test.
      
An impact fatigue test has been designed for studying the repeated biaxial impact load response of polymers.
      


The behavior and mechanism of the tempered martensite embrittlement(TME) of an ultra-high strength steel 30CrMnSiNi2A, subjected to oil quench-ing from 900℃ and tempering at various temperatures below 600℃, arestudied in this paper. The experiments carried out include determination ofmechanical properties, measurement of quantities of retained austenite, examina-tion of microstructures, and fraetographies. The results are summarized asfollows: 1. TME is observed in the 30CrMnSiNi2A steel oil quenched and tem-pered....

The behavior and mechanism of the tempered martensite embrittlement(TME) of an ultra-high strength steel 30CrMnSiNi2A, subjected to oil quench-ing from 900℃ and tempering at various temperatures below 600℃, arestudied in this paper. The experiments carried out include determination ofmechanical properties, measurement of quantities of retained austenite, examina-tion of microstructures, and fraetographies. The results are summarized asfollows: 1. TME is observed in the 30CrMnSiNi2A steel oil quenched and tem-pered. The behavior of TME is markedly affected by straining rate, and thisis attributable to different embrittlement machanisms. 2. At high rate of strain (i.e. impact test with Mesnager U-notch speci-men), the impact toughness decreases in the tempering temperature range of350-550℃. The minimum value of impact toughness is observed at about 450℃.Therefore, it may be called 450℃ embrittlement. This embrittlement is mainlyattributed to noncontinuous precipitation of cementite formed by the decomposi-tion of retained austenite films at the boundaries of martensite laths or aroundthe M/A island structures. In this case, the fractograph looks like a mixturetype of transgranular quasi-cleavage and dimple. 3. At lower rate of strain (i. e. the plane strain fracture toughness testand the impact-fatigue test), the fracture toughness and impact-fatigue lifedecrease in the tempering temperature range of_300-400℃. The minimum valuesof these are observed at about 350℃. Therefore, it may be called 350℃ embrit-tlement. This embrittlement is mainly attributed to decreasing mechanical sta-bility of retained austenite, which in turn greatly favours the formation ofhigh carbon content martensite located in interlaths during plastic strain. In this case, the crack propagates mostly along the lath boundaries and seldomthrough the laths. 4. Increasing the mechanical stability of retained austenite is one im-portant way to improve the combination of strength and toughness of 30CrMn-SiNi2A steel subjected to low tempering temperature. The mechanical stabilityof retained austenite can be controlled by tempering. Consequently, this resultprovides a general theoretical basis for laying down tempering temperature ofother ultra-high strength steel. The experiment indicates that optimum combination of strength, toughnessand impact-fatigue life for 30CrMnSiNi2A steel can be obtained through oilquenching and tempering at about 250℃. This result is attributed to the highestmechanical stability of its retained austenite.

本文研究了超高强度钢30CrMnSiNi2A的回火马氏体脆性(以下简称TME)及与之有关的机械性能,结果表明:该钢TME的表现行为随着加载条件的不同而异。在高速加载条件下,即冲击韧性试验时,TME发生在350~550℃回火温度区间;在低速加载条件下,即静态断裂韧性或冲击疲劳试验时,TME发生在300~400℃回火温度区间。通过在适当温度(200~300℃)回火,可提高其残余奥氏体γ_R的机械稳定性,从而获得良好的强韧化效果。实践证明,在250℃附近回火可获得强度、韧性和冲击疲劳寿命的最佳配合。

in this paper,the tension,bending,torsion,compression,fracture toughness and impact fatiguetests were carried out using six cold forming steels.The optimum parameters of strength,ductility,andtoughness of tool-die steels are discussed on the basis of experiments.The relationship between these parame-ters and resistance of impact fatigue which is the dominant paramter against fracture of cold forming dies isalso discussed and the strength and the ductility obtaind from static tests can be used to evaluate qualitativelythe...

in this paper,the tension,bending,torsion,compression,fracture toughness and impact fatiguetests were carried out using six cold forming steels.The optimum parameters of strength,ductility,andtoughness of tool-die steels are discussed on the basis of experiments.The relationship between these parame-ters and resistance of impact fatigue which is the dominant paramter against fracture of cold forming dies isalso discussed and the strength and the ductility obtaind from static tests can be used to evaluate qualitativelythe behaviour of steels under cyclic impact loading.

本文选用冷变形工模具钢T8、T10、GCr15、6CrW2Si、6Cr4Mo3Ni2WV 和W18Cr4V钢进行了拉仲、弯曲、扭转、压缩、断裂韧性和冲击疲劳试验。结果表明,各钢种在拉伸、弯曲、扭转和压缩状态下测得的屈服极限以及相应的拉伸断面收缩率(ψ)、抗弯塑性挠度(f_ρ),塑性扭转角(φ_p)和压缩相对变形量(ε)具有相同的变化规律,因此,冷变形工模具钢的强度指标应是不同试验方法测得的屈服极限,塑性指标应是ψ、fp、φ_P、和ε.冷变形工模具钢的韧性指标α_k 和K_(IC)主要反映了钢的塑性。从防止模具早期断裂的角度,冷变形工模具钢的主要失效抗力指标-冲击疲劳抗力可以根据相同应力状态下静载试验测得的屈服强度和塑性指标进行评定。

The bending fatigue properties and fractography of normalized tufftrided 45 steel were analyzed. Based on fracture mechanics approach, the fracture properties were studied. It is shown that the fracture properties are determined by materials strength before tufftride process and by materials toughness after tufftride process. The impact fatigue tests show that the tufftride process has a bad influance on impact fatigue properties of materials. It is suggested that the hardened layer should be as thin as the...

The bending fatigue properties and fractography of normalized tufftrided 45 steel were analyzed. Based on fracture mechanics approach, the fracture properties were studied. It is shown that the fracture properties are determined by materials strength before tufftride process and by materials toughness after tufftride process. The impact fatigue tests show that the tufftride process has a bad influance on impact fatigue properties of materials. It is suggested that the hardened layer should be as thin as the possible to guarantee favarable plasticity and toughness under the condition that the surface properties can meet the demoned of desigus.

对45钢正火态软氮化处理前后的旋转弯曲疲劳性能及其断口进行了定量和电镜分析。从断裂力学观点分析了疲劳最后断裂性质。结果表明:疲劳最后断裂性质取决于材料的强度和韧性。同时,冲击疲劳试验表明:软氮化处理使冲击疲劳性能劣化,这是因表面硬化层约束了柔软心部,使整体材料的韧性变差的结果。因此,表面硬化处理时,在保证设计要求的条件下,尽量减少层深,以保证材料有适应的韧塑性。

 
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