The results show: the strongest bond is the Al-Al bond in the segregated cell without containing vacancy, where the Al atomic covalence radius is greater than that of Li atom in the cell; while the strongest bond is the Al-Li bond in the segregated cell containing vacancy, and the Al atomic covalence radius in the cell is less than that of Li atom. Since the difference of electronagativity between the Al and Li atoms is obvious, it is inclined to formed the Al-Li segregated cell of short range order structure in the condition of vacancy present. The short range order structure containing vacancy is probably the embryo or precursor structure of the metastable phase δ'(Al3Li). Because the strongest covalent bond in the Al-Li-vacancy segregated cell in alloy formed in quenching is the main strength reason for supersaturated solid solution of alloy. The bond net of succeeding precipitation of δ'(Al3Li) has the picture of anisotropic Al-Al bonding and the bond intensity enhanced. Since the δ'(Al3Li) is coherence with matrix, the bond net strength is enhanced by the precipitation of δ'(Al3Li) and so strengthen the alloy.

計(jì)算結(jié)果表明：不包含空位的偏聚晶胞的鍵絡(luò)最強(qiáng)鍵為Al-Al鍵拍自拍亚洲手机黄色视频在线观看，其中Al原子的共價(jià)半徑較Li原子的共價(jià)半徑要大；而含空位的偏聚晶胞的最強(qiáng)鍵為Al-Li鍵，Al原子的共價(jià)半徑要比Li原子的共價(jià)半徑要泻肥悠翟谙咭磺；在空位存在的情況下色哟哟影视基地，由於Al原子與Li原子的電負(fù)性相差明顯a片在线观看哟哟哟，促使Al和Li原子結(jié)合，傾向形成Al-Li短程序結(jié)構(gòu)偏聚區(qū)456小视频，這種含空位的短程序結(jié)構(gòu)很可能就是δ'(Al3Li)亞穩(wěn)相的前兆結(jié)構(gòu)和生長胚胎69免费视频；由於Al-Li-空位有序偏聚晶胞的Al-Li鍵絡(luò)比基體鍵絡(luò)要強(qiáng)許多，因此日韩手机福利写真在线观看，淬火過程中合金生成的Al-Li-空位偏聚晶胞對合金過飽和固溶體起主要強(qiáng)化作用日本三级欧美三级人妇视频；后續(xù)析出的δ'(Al3Li)亞穩(wěn)相鍵絡(luò)各項(xiàng)異性顯著，鍵絡(luò)強(qiáng)度明顯提高污污色色；由於Al3Li與基體共格视色4se，其大量均勻彌散析出起到提升基體整體鍵絡(luò)強(qiáng)度，同樣對合金產(chǎn)生強(qiáng)化作用色影音。

The influences of isothermal quenching temperature on the retained austenite and mechanical properties of ADI were studied.

摘要研究了等溫淬火溫度對ADI中殘余奧氏體及其力學(xué)性能的影響5566综合网。

The influence of isothermally-quenching temperature on the retained austenite in ADI and mechanical properties of ADI was investigated.

研究了等溫淬火溫度對等淬球鐵中殘余奧氏體及其力學(xué)性能的影響。

Enterprises to adopt advanced production equipment and testing equipment, has automatic variable cross-section mill CNC, automatic volume headphones, automatic CNC Control Step-by-step heat treatment furnace, hardening machine, stress shot peening machines, automatic assembly line, electrostatic spray lines, etc.; with professional Physicochemical room and laboratory, equipped with polishing machine, vertical metallographic microscope, spectrophotometer,¨furnace, carbon and sulfur analyzer United, fatigue tester, stiffness tester, high-arc machine Rockwell Hardness Tester and a full range of advanced testing equipment.

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Keywords axle box base;double quenching;ferrite;fine grain strengthening

抱軸承箱亚洲欧美激情小说图片；二次淬火；鐵素體www.slgxq.com；細(xì)晶強(qiáng)化

By analyzing the reason of the numerical oscillation phenomenon and computing the temperature field in plate rolling process,it is found that numerical oscillation can be restrained effectively when the heat capacity matrix is lumped by using backward difference scheme.

近年來人人射AV网站，許多研究人員采用有限元法分析熱軋和淬火等過程中的瞬態(tài)溫度場。

As the size of parts to be hardened increases, the surface hardness decreases somewhat even though all other conditions have remained the same.

即使所有其它條件保持不變日韩视频在线免费播放，隨著要淬火的零件尺寸的增加其表面硬度也會(huì)有所下降欧美加勒比。

The results show that these semi-high speed steels can be hardened remarkably by secondary hardening to meet the hardness requirements of cold rolling. The secondary hardness of the tested steels is increased with the contents of alloying elements such as Mo, V, Si and changed with quenching temperature to show two peaks.

研究結(jié)果表明，新型半高速鋼有顯著的二次硬化效應(yīng)操亚洲无码视频，能滿足冷軋工作輥的硬度要求激情视频在线网；隨Mo、V和Si等合金元素含量升高鋼的二次硬度升高嘿咻嘿咻无码免费视频，隨淬火溫度升高鋼的二次硬度出現(xiàn)兩次峰值久久av中文字幕免费在线观看。

The second chapter is about Quenching problem of globallycoupled bistable stochastic systems with finite size.

第二章討論全局耦合隨機(jī)雙穩(wěn)系統(tǒng)的淬火問題及有限尺寸效應(yīng)。

The carbon tool steel was quenched into the different concentration of calcium chloride watery solution.

對碳素工具鋼采用不同濃度的氯化鈣水溶液進(jìn)行淬火欧美18一19sex性外。