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   冲击疲劳寿命 的翻译结果: 查询用时:0.636秒
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冲击疲劳寿命
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  impact fatigue life
     he failure analysis shows that the failure form of the dies for rolling thread is pitting and delamination resulting from less toughness' The results of impact fatigue test prove that the impact fatigue life of a new type of die steel with high strength and high toughness-LM1 is longer than that of Cr12Mov steel which has undergone different heat treatment.
     对滚丝模失效的分析可以搞清滚丝模的寿命及磨损等问题,通过扫描电镜等方法的研究,认为失效形式为麻点剥落,是由于材料韧性不足造成的.对Cr12MoV和LM1材料在冲击试验机上进行冲击疲劳试验结果表明,新型高强度高韧性模具钢LM1在不同冲击能量下的多次冲击疲劳寿命明显高于经不同制度热处理的Cr12MoV钢.
短句来源
     Inquiry of Impact Fatigue Life Estimation for Roller Conveyer at the Blooming-Shabbing of Baoshan Iron &. Steel Complex
     宝钢初轧厂工作辊道冲击疲劳寿命估算
短句来源
     The results show that the impact fatigue life and bending fatigue life increase with the increase of amount of ferrite. The best amount of ferrite is about 10%.
     结果表明,铁素体含量增加,冲击疲劳寿命及弯曲疲劳寿命均增长,铁素体含量达到约10%时,这两种疲劳性能为最佳。
短句来源
     By applying reasonable heat treatment process the excellent properties have been obtained. The hardness:50~55HRC,the impact toughness a K=8~15J/cm 2,and the impact fatigue life of 80mm mill ball has reached over 20000 times (dropping times of dropping ball experiment).
     选择了合理的热处理工艺 ,获得了优良的性能 ,使其硬度达 5 0~ 5 5HRC ,冲击韧度aK=8~ 15J/cm2 ,80mm磨球冲击疲劳寿命 (落球试验的跌落次数 )达 2万次以上
短句来源
     The appropriate heat treatment process was chosen and the excellent properties were obtained. The rockwell hardness:50~55 HRC,the impact toughness a K :8~15J/cm 2.And the impact fatigue life of φ 80 mm mill ball reached 20000 times(dropping times of dropping ballexperiment).
     选择合理的热处理工艺 ,获得了优良的性能 ,洛氏硬度达 5 0~ 5 5 HRC,冲击韧度为 8~ 15 J/ cm2 ,80 mm磨球冲击疲劳寿命(落球试验的跌落次数 )达 2万次以上
短句来源
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  impact-fatigue life
     Experimental Study on Impact-Fatigue Life of Commercial Low Alloy Steels' Weld
     常用低合金钢焊接接头冲击疲劳寿命的试验研究
短句来源
  fatigue impact
     Using the authors developed numerical simulation software of temperature field,the solidification process of wear resisting cast balls was numerically simulated. Based on the simulation and the law of temperature distribution of solidification process for the cast ball,the shrink holes of the cast balls were removed by adjusting the foundry parameters. Therefore fatigue impact test shows that the diameter 127?
     利用温度场数值模拟对低铬硼铸球的凝固过程进行了计算·在研究铸球凝固过程温度分布规律的基础上 ,改进了铸造工艺 ,消除了缩孔等缺陷·经落球冲击疲劳寿命试验机测定 ,直径 12 7铸球落球次数 >80 0 0次·
短句来源
  “冲击疲劳寿命”译为未确定词的双语例句
     A new comparative test approach is provided for the thermal fatigue life experiments of turbine blade under thermal shock.
     针对涡轮叶片的热冲击疲劳寿命实验,提出了一种新的对比实验方案和措施:将实验叶片和参照叶片组合在同一组试验叶栅上,并且在试验过程中定期对调两种叶片的安装位置。
短句来源
     3.Based on the theory of vibration fatigue, the fatigue life of the plug in electrical parts is predicted.
     4.对一般疲劳理论进行了修正,使其适用于冲击疲劳理论,计算了弹塑性条件下插装型电子元器件的冲击疲劳寿命
短句来源
     The property of impact fatigue of roller can be increased further by means of (he diffusion treatment in short times after carboni t riding. Average life-span of the roller by aboTe treatment is four times longer.
     氰化后又重新进行短时扩散处理及回火的滚子,冲击疲劳寿命可进一步提高,其平均冲击疲劳寿命约为原工艺的5倍。
短句来源
     Comparative tests were conductod with frequent low energy impacts forspecimens made from such commercial low alloy steels as 16 MnR, 15 MnYNand 18 MnMoNb and for their welds. The purpose is to investigate the influe-nce of welding-heat cycle on the resistance to frequent impacts at a weld, aswell as the resisting behavior or the impact--fatigue life related.
     对常用低合金钢 16 MnR,15 MnVN 以及18 MnMoNb 钢及其焊接接头进行了小能量多次冲击对比试验,以分析焊接热循环对焊接接头多冲抗力(冲击疲劳寿命)的影响及变化规律。
短句来源
     In comparison with the martensite structure obtained by isothermally quenching in martensite range,the meta-bainite has more excellent strength and plasticity, lower notch sensitivity, stronger strain hardenability, higher fatigue strength, longer strain or impact fatigue 1ife, slower crack propagation rate and more remarkable overload effect on increasing fatigue life.
     与马氏体区等温淬火马氏体组织相比,准贝氏体具有更佳的强塑性,并具有缺口敏感性低,形变强化能力强,疲劳强度高,应变疲劳和冲击疲劳寿命长,裂纹扩展速率慢以及超载延寿效应明显等优点。
短句来源
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  impact fatigue life
AISI 4615 steel differential gears were plasma carburized at 1040 °C for performance tests to determine whether the more rapid carburization at the higher temperature would have any deleterious effect on impact fatigue life.
      
Effect of the microstructure of high-strength cast iron on its cracking resistance and impact fatigue life
      
  fatigue impact
We also used: the Beck Depression Inventory (BDI) for depression, the Tempelaar Social Experience Check-list (SET) for social activities and the Fatigue Impact Scale (FIS).
      
Construction and validation of a fatigue impact scale for daily administration (D-FIS)
      
The fatigue impact scale (FIS) was developed previously as a symptom-specific profile measure of health-related quality of the (HRQoL) for use in medical conditions in which fatigue is a prominent chronic symptom.
      
Items for the daily fatigue impact scale (D-FIS) were selected from the pool of original FIS items through Rasch analyses of existing data.
      
Rasch analyses were used to further reduce the scale to a minimum number of items that represented a unidimensional measure of self-reported fatigue impact.
      
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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。

The effect of deep caae of rarbonitriding on the properly under test Of the impact fatigue in steel 10 chain-roller has been investigated by means Of increasing time of carbonitriding and middle temperature treatment. The results of this investigation indicate that deep case of carboni t riding and then tempering at a suitable temperature may notably increase the proprty of impact fatigue of the roller in the conditions of content of carbon of a carbonit rided case equal to or slinghtly under eutectoid composition....

The effect of deep caae of rarbonitriding on the properly under test Of the impact fatigue in steel 10 chain-roller has been investigated by means Of increasing time of carbonitriding and middle temperature treatment. The results of this investigation indicate that deep case of carboni t riding and then tempering at a suitable temperature may notably increase the proprty of impact fatigue of the roller in the conditions of content of carbon of a carbonit rided case equal to or slinghtly under eutectoid composition. The property of impact fatigue of roller can be increased further by means of (he diffusion treatment in short times after carboni t riding. Average life-span of the roller by aboTe treatment is four times longer.

本文通过增加氰化时间和中温扩散处理研究了深层氰化对链条滚子冲击疲劳性能的影响。研究结果表明,表层含磷量相当或略低于共析成份的情况下,深层氰化并经适当温度回火,可以明显地提高滚子的冲击疲劳性能。氰化后又重新进行短时扩散处理及回火的滚子,冲击疲劳寿命可进一步提高,其平均冲击疲劳寿命约为原工艺的5倍。

The toughness of the frame and front fork of bicycle has been tested by precooling quenching after the salt bath and braze welding. The result shows that the welding seam to the frame and front fork is tight and smooth when the precooling temperature reaches 880℃ before quenching. The martensite structure of hardening position also is compact. The impact and fatigue life of the frame and front fork will be prolonged.

本文研究了自行车架和前叉盐浴钎焊后预冷淬火强火。结果表明,预冷至880℃淬火,焊缝饱满、严密,强化部位低碳马氏体组织细致良好,车架、前叉的冲击疲劳寿命显著提高。

 
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