仿生耦合论文：激光仿生处理蠕墨铸铁的抗热疲劳性及其对磨损性的影响

1、仿生耦合论文：激光仿生处理蠕墨铸铁的抗热疲劳性及其对购买全文在线加 QQ 13993 8848 即付即发同时提供论文写作指导和学术期刊发表服务在:本立为学术立献总库合作提供 I 如有异溟请与总库或学校联系0磨损性的影响【中文摘要】利用激光能量集中的特点，在蠕墨铸铁表面实现局 部熔凝，加工出具有更加细小的尺寸，性能更好的单元体组织，与蠕 墨铸铁表面有机地耦合起来，以此来模仿生物体表的非光滑耦合结 构，可使蠕墨铸铁的耐磨损性能和抗热疲劳性能都得到显著提高。试验重点研究了：热疲劳参数对仿生试样抗热疲劳性能的影响； 热疲劳 参数对仿生试样耐磨性的影响；仿生试样抗热疲劳性与耐磨性的关 系。蠕铁制动盘的应

2、用表明，在绝大多数情况下，制动盘的磨损是经 受不同程度热疲劳后的磨损行为。 所以，制动盘的失效是热疲劳和磨 损共同作用的结果。因此对激光仿生处理后的试样和蠕墨铸铁母材进 行热疲劳后的磨损实验。实验结果表明：仿生试样比未处理试样具有 更好的抗热疲劳性能：随着热疲劳程度的加深（热疲劳循环次数增加 或热疲劳温度提高） ，试样的热裂纹数量增加，最长裂纹的长度增大， 试样的抗热疲劳性能下降。但在相同的热疲劳程度下，仿生试样的热 裂纹数量和最长裂纹长度均低于未处理试样， 表明仿生试样的抗热疲 劳性要优于未处理的试样；随着热疲劳次数的增加或热疲劳温度的提 高，试样的磨损量增加，耐磨性下降，仿生试样的磨损量始

3、终低于未 经仿生处理试样的磨损量，表明即使经过热疲劳，激光仿生处理仍然 是提高材料抗磨损性能的有效途径。购买全文在线加 QQ 13993 8848 即付即发同时提供论文写作指导和学术期刊发表服务在:本立为学术立献总库合作提供 I 如有异溟请与总库或学校联系0【英文摘要】 The laser has characteristic of energyconcentration. Using this characteristic, thebio-mimeticunits, which have smaller size and better characteristics, areprocesse

4、d on the surface of vermicular graphite cast iron. The vermiculargraphite cast iron surfacecoupled with the bio nic units, which mimic thenon-smooth and coupling structure oforganisms table, can significantlyimprove its wear-resista nee and thermal fatigueresista nee. The studiesfocus on the in flue

5、 nee of thermal fatigue parameters on bio-mimeticsamples thermal fatigue resista nee, the in flue nee of thermalfatigueparameters on bio-mimetic samples wear resista nee and therelati on ship betwee n thethermal fatigue resista nee and wear resistance.The applicati on of vermicular graphite cast iro

6、n brake disc showsthat, i n mostcases, the brake disc is subjected to the wear behavior whichis after differentdegreesof thermal fatigue. Therefore,the failure of the brake disc is a together result ofthermal fatigue and wear.So the thermal fatigue resista nee and the wear resistancewhich isafter di

7、fferentdegrees of thermal fatigueof the vermicular graphite cast iron processed by laser bionic treatme ntarestudied. The experime ntal results show thatwiththe deepening of the degree of thermal fatigue (thermal fatigue购买全文在线加 QQ 13993 8848 即付即发同时提供论文写作指导和学术期刊发表服务在:本立为学术立献总库合作提供 I 如有异溟请与总库或学校联系0cyc

8、les in creasedor thermal fatigue temperature in creased),thethermal cracks nu mbers and the Ion gestcrack len gth of samples increase, that is to say the thermal fatigue resista nee ofsamples degrades.But un der the same degree of thermal fatigue, the cracks nu mbera ndthe Ion gest crack len gth of

9、the bio-mimetic samples are lower tha nthose of the un treated samples; this in dicates that the thermal fatigueresista nee of bio-mimeticsamples is superior to the un treated samples.Mea nwhile with thermal fatigue cyclesor thermal fatigue temperature increas ing,the abrasi on loss of samples in crease,an dthe wear resista nee of samples decreased. While the abrasi on lossof bio-mimeticsamples is always lower tha n that of un treated samples,this result in dicates that eve nafter the thermal fatigue, the laserbio-mimetic process is still an effective way to improve the wear resistan