《材料成型及控制工程专业论文—轧制退火后316l奥氏体不锈钢晶界特征分布41137》由会员分享，可在线阅读，更多相关《材料成型及控制工程专业论文—轧制退火后316l奥氏体不锈钢晶界特征分布41137（33页珍藏版）》请在金锄头文库上搜索。
1、摘要I毕业设计(论文)轧制退火后316L 奥氏体不锈钢晶界特征分布摘要II摘 要1984年Watanabe首次提出了“晶界设计与控制”思想,指出采用适当工艺可以增加多晶体中重合位置点阵(CoincidenceSiteLattice,CSL)晶界的数量,从而提高材料的强韧性能。1995年Lin等人第一次通过实验研究评估了“晶界设计和控制”对块体材料抗晶间腐蚀性能的影响,并进一步把它发展为晶界工程。因此，“晶界工程”对优化316L奥氏体不锈钢抗腐蚀性能有很大的研究价值。本文采用电子背散射衍射（EBSD）技术初步研究了，316L奥氏体不锈钢经“晶界工程”处理的5个试样（2.5%变形量1000退火：2
2、h （1#）、24h（2#）；2.5%变形量1000退火： 2h（3#）、6h（4#）、24h（5#）。）。他们经不同冷轧小变形和退火时间的处理。1#与2#对比，3#、4#与5#对比，得出同一变形量和退火温度条件下，退火时间对优化效果的影响。1#与3#对比，2#与5#对比，得出同一退火温度和退火时间条件下，变形量对优化效果的影响。利用奥林巴斯(AOLY MPUS)GX51金相显微镜观察了原始态样品和5个处理的试样的晶界特征分布，然后对5个处理的试样采用电子背散射衍射（EBSD）技术得出OIM图、GB+SB图、CSLB图。通过，对比原始态试样与5个处理试样的图样，用以证明经过经“晶界工程”处理的
3、5个试样晶界是否得到优化。经过对5个处理试样的EBSD图样，横行和纵向对比，得出想要得出的结论。实验表明，“晶界工程”处理样品的特殊晶界比例比原始态的要大；同一变形量和退火温度条件下，在一定范围内，特殊晶界比例随退火时间增长而增大；同一退火温度和退火时间条件下，在一定范围内，特殊晶界比例随变形量增大而增大；试样变形量增大，内部储能就相应大，最佳优化对应的退火时间就短；2.5%变形量1000退火的一组样品，退火24小时的优化效果最佳，特殊晶界比例达到58%；4.5%变形量1000退火的一组样品，退火2小时的优化效果最佳，特殊晶界比例达到75%关键词：关键词：316L316L 不锈钢，晶界工程，晶
4、界特征分布，不锈钢，晶界工程，晶界特征分布，EBSDEBSD，变形量，退火时间。，变形量，退火时间。AbstractIIIAbstractIn 1984 the first time Watanabe put forward “the design and control of grain boundaries“ thought, pointed out that using the appropriate technology can increase the polycrystal coincidence position dot matrix (CoincidenceSiteLattic
5、e, CSL) the number of grain boundaries, so as to improve the material of very tough performance. In 1995, the first time people Lin through experimental study assessed the “grain boundaries design and control“ to block material intergranular corrosion resistant performance influence, and further dev
6、elopment of grain boundaries for the project. Therefore, “effects of engineering“ to optimize the 316 L austenitic stainless steel corrosion resistance have great value. This paper adopts electronic backscatter diffraction (EBSD) technology was studied, the 316 L austenitic stainless steel by “grain
7、 boundaries engineering“ treatment of 5 samples (2.5% deformation-1000 annealing: 2 h (1#), 24 h (2#); 2.5% deformation-1000 annealing: 2 h (3#), 6 h (4 #), 24 h (5#).) . They by different small deformation and annealing cold rolling time processing. 1 # and 2 # contrast, # 3, 4 # # 5 and concludes
8、that the same deformation and the annealing temperature conditions, annealing to optimize the effect of the time. # 1 and # 3 contrast, # 2 and # 5 concludes that the same annealing temperature and annealing time conditions, to optimize the deformation effect. Use Olympus (AOLY MPUS) GX51 metallogra
9、phic microscope the primitive state samples and five processing sample characteristics of grain boundaries, and then the five processing samples by electronic backscatter diffraction (EBSD) technology that figure, GB + SB OIM figure, CSLB figure. Through the, compared to the original sample and five
10、 processing mode the pattern, that proves the after the “grain boundaries engineering“ treatment of 5 samples whether grain boundary was optimized. AbstractIVAfter dealing with the sample to 5 EBSD pattern, and longitudinal across concludes that want to come to the conclusion. Experiments show that,
11、 “effects of engineering“ processing of grain boundaries special sample rate than the original state to big; The same deformation and the annealing temperature conditions, in a certain range, the special effects of proportion and increased with time annealing growth; The same annealing temperature a
12、nd annealing time conditions and within a certain range, the special grain boundaries with deformation ratio increases; Specimen deformation increase, internal energy storage are big, best optimizing the corresponding annealing time is short; 2.5%-1000 annealing deformation of a set of samples, anne
13、aling of 24 hours the optimization effect is best, special grain boundaries to 58%; 4.5%-1000 annealing deformation of a set of samples, annealing 2 hours of the optimization effect is best, special grain boundaries to 75% Keywords: 316 L stainless steel, from engineering, the characteristics of grain boundaries, EBSD, deformation, annealing time. 第一章引言6目 录摘要.Abstract.目录.第一章 引言.11.1 不锈钢的介绍 .1 1.2 晶界特征分布 .2 1.3 研究目的 .2 1.4 有关晶间腐蚀实验的研究 .3 1.4.1 晶间腐蚀的特征和概念 .3 1.4.2 晶间腐蚀机理 .3 1.5 实验课题的背景和意义 .4 1.6 论文主要研究内容 .5第二章 实验方法.72.1 前言 .7 2.2 实验过程和方法 .7 2.2.1 腐蚀方法 .8 2.2.2 实验试剂制备 .
