Based on the analyses on mechanical properties, microstructure and fracture of - the microalloyed steels socrv with various heat treatment technique, it can be affirmed that various fractures arttribute to various mechanism, we can draw conclusion that the strength and toughness of microalloyed steels 50crv will be increase simultaneously by optimal heat treatment technique. to illustrate the mechanism of the strength and toughness of microalloyed steels socrv, we designed the comparative experiment and observed the microstructure of the sample which occurred at different quench and tempering temperature and different tempering time. the last experiment results were determined by the four factors : fined microalloyed elements grains, the decompound of martensite, martensite transformation of remnant austenite and the second phase precipitation
為解釋微合金
化50crv鋼強
韌化機理,本文通過對不同淬火溫度,回火溫度,回火時間下的力學性能指標的對比及顯微分析,認為微合金元素的細
化晶粒,馬氏體的回火分解,殘余奧氏體的轉變,第二相的沉澱析出共同決定了微合金鋼的強
韌化情況,特別是由於微合金元素的存在,其細
化晶粒及其碳氮
化物的沉澱析出,導致鋼的良好的強
韌性,並且如果工藝滿足第二相的沉澱析出強
化大於回火馬氏體分解引起的軟
化效應,會在硬度曲線中產生明顯的二次硬
化現象。
Conclusion the etiology of chronic ankle pain after ankle sprain was mainly caused by scars, synovitis after tearing of anteroinferior tibiofibular ligament, anterior talofibular ligament, deep layer fiber of the deltoid ligament, and lesions of the cartilage
結論踝關節扭傷后長時間腫痛大多是因前下脛腓
韌帶、前距腓
韌帶、三角
韌帶深層纖維瘢痕
化,滑膜炎癥或並發軟骨損傷所致。
Specification for toughened polystyrene for sheet extrusion
板材擠壓用
韌化聚苯乙烯規范
Acicular ferrite formation in a pipeline steel with thermo - mechanical control process
管線用超低碳鋼中針狀鐵素體的形成及強
韌化行為
Specification for thermally toughened glass panels for use in domestic appliances
家用電器用熱
韌化玻璃板規范
Progress in the strengthening and toughing of mosi2 through composite approach
二硅
化鉬材料復合強
韌化的研究進展
Strengthening and toughening mechanisms of the microalloying non - quenched and tempered steel
微合金
化非調質鋼強
韌化機理研究
Toughening mechanisms of - tial alloys and improvement methods
基合金的
韌化機理及途徑
So far, several toughening methods have been explored out and have produced significant effectiveness
迄今為止,已經探索出了若干種
韌化途徑,並收到了顯著的效果。
In such a case, the toughening to ceramics, as a result, has become into one of the key studies of materials science
為此,陶瓷的
韌化便成了材料科學的核心課題之一。
Another research finds that the ball mechanic milling on high - cr alloy powders has obvious effects on strengthening and toughening of the material. it is an effective approach for the materials " strengthening and toughening
還發現,機械球磨合金粉末對高鉻覆層材料的強
化和
韌化有明顯作用,是實現材料強
韌性的有效途經。
The micromorpholgy and grain boundary microstructure of the material were studied with sem and tem and the grain boundary phase composition were analyzed with eds and x - ray the mechanical properties, micromorpholgy microstructure of grain boundary and phase composition of al2o3 composite ceramics were systematically studied, the effect of additives, the relationship between microstructure and mechanical strength, the sintering mechanism of the material and influence factors of the structure and properties of al2o3 composite ceramics were discussed respectively
系統研究了氧
化鋁陶瓷的力學性能、微觀形貌、晶界顯微結構,並討論了各添加組分的作用、材料顯微結構與力學性能的關系以及材料的燒結機理和影響材料結構與性能的影響因素。本論文探討了氧
化鋁基復相陶瓷的強
韌化機理,實驗表明al _ 2o _ 3 - ticn體系主要是微裂紋
韌化。
The micromechanisms of fracture in engineering materials have been studied in this thesis, with particular emphasis on the dislocations behavior in the front of crack tip and the processes of crack nucleation and propagation on nanometer scale. the relation between the microprocesses of fracture and the macromechanical behaviors were investigated, which will be helpful to the strengthening and toughening of engineering materials
本文首先對材料斷裂文獻進行綜述,了解斷裂微觀機理研究的過去成就、現狀和發展,確定本文研究的內容為工程材料斷裂的微觀機理,側重裂尖微區位錯行為和納米尺度上微裂紋形核與擴展過程及微觀組織的影響,斷裂微觀過程與宏觀力學行為的關系,為工程材料的強
韌化提供理論依據。
The reinforced - toughening and oxidation - resistance in high - temperature analysis of tial intermetallics
金屬間
化合物的強
韌化及高溫抗氧
化分析
Multilayer composite is a kind of obdurability material, which is imitative of the framework of shell in the nature. this kind composite is especially attractive because of its high toughness
疊層材料是人們模擬自然界貝殼的結構設計出的一種仿生結構強
韌化的材料,由於具有較高的
韌性而倍受關注。
Study on heat treatment of cr12mov steel
鋼強
韌化工藝
Effect of cryogenic and magnetic field cryogenic treatment on retained austenite in steels
鋼的強韌化及深冷處理在冷擠壓模上的應用