過度回火 的英文怎麼說
中文拼音 [guòdùhuíhuǒ]
過度回火
英文
overtempering-
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。Induction heated oil tempered spring wire is a kind of new technical material which has been developed since 1980s. it can be heated by means of eddy induced into itself through electromagnetic coil and this method is mainly used in surface quenching. with correct designing and reasonable current frequency, induction coil and heat treatment process selected, as well as plc controlling applied, the wire can be uniform heated along cross - sectional and longitudinal direction and can be quenched and tempered continuously
應加熱油淬火-回火彈簧鋼絲，是二十世紀八十年代發展起來的新技術材料，在國外稱為itw induction heat oil tempered spring wire 。是通過線圈電磁感應鋼絲本身產生的渦流進行加熱，通常主要用於表面淬火。經正確設計，選擇電流頻率，合理的感應線圈及熱處理工藝，並實施plc控制，可使鋼絲整個截面及長度上得到均勻加熱，進行連續整體淬火和回火。Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義We select ni / cr alloy resistor as element together with ceramic embedding hearth ; select small flat - and - disc heat - even hubby ceramic sample holder, select ni / cr & ni / si thermoelectric couple ( type k ) as thermoscope with threads 0. 5 mm in diameter which is installed in the middle of the holders symmetrically ; select aluminum silicate fire - retardant fiber as materials for heat preservation ; design some hardware, for example temperature controller & transporter, signal amplifier etc ; design controlling curve to heat stove ; and introduce the method of least squares nonlinear regression and subsection function to deal with data. in order to obtain the reasonable operation conditions and operation curve, we have also done many theory analysis and experiment discussions
通過理論和試驗探討，選用鎳鉻合金電阻絲作為加熱元件，配以陶瓷質埋入式爐膛；選用陶瓷質小尺寸扁平?圓盤均熱塊體型樣品支持器；選用0 . 5mm絲徑鎳鉻?鎳硅熱電偶（ k ）作為測溫元件；熱電偶對稱安置在樣品支持器容器的中部；選用硅酸鋁耐火纖維作保溫材料；合理選用和設計了溫度控制器、溫度變送器、信號放大電路等硬體；採用升溫曲線來控制爐膛供熱過程；採用最小二乘法非線性回歸與分段函數相結合的曲線模擬方法，進行圖形處理。It is possible to suppress brittleness and increase the strength and toughness by optimizing heat treatment process especially for microalloyed steels 50crv. in addition, heat processing for microalloyed steels socrv was investigated in principle in the paper
通過微合金元素產生的沉澱強化，可以彌補回火造成的強韌性的下降，設計最佳的熱處理綜合工藝將可以同時提高鋼的強度和韌性，同時還可保持一定的硬度。The result shows that tempered martensite has apparent lath character when temper is between 740 ~ 780, and the hardness of welded joint is 264 ~ 237hv, which can get better performance of the welded joint the lath character of martensite in welded joint disappears, and the carbide in the tempered sorbite of the base metal will aggregate when temper temperature is above 780, and the hardness and plastic property will reduce obviously
結果表明，在740 ~ 780之間回火，焊縫硬度為264 ~ 237hv ，回火馬氏體板條特徵明顯，可以獲得優良的焊接接頭性能；回火溫度超過780 ，焊縫板條馬氏體特徵消失，母材回火索氏體中碳化物產生偏聚，硬度、塑性明顯降低。After the exergy analysis of the jet pump model scwr system, the accounting thermal economics was used to perform the system ' s analysis. at last, the " weakness tache " in the system was received and the improvement of system was put forward
然後在此基礎上，以（火用）定價通過建立會計學熱經濟數學模型，計算得到了回收系統的熱經濟學角度的「薄弱環節」和系統的改進方向。The seismic behavior of longitudinal middling - high r. c shear wall with frame column is discussed through model experimentations and finite element methods in this paper, after taking frame - shear wall structure of a main factory building of the large capacity power plant as experimentative prototype. the major work as follow : in order to appliance pseudo static test, the longitudinal middling - high r. c shear wall with frame column in the large capacity power plant ' s main factory building has been simulated to a model structure with 1 / 15 reduced - scale. the contents of study are process of cracking, course of damage, skeleton curve, rigidity degradation, ductility characteristic etc. that the seismic behavior of this kind of middling - high r. c shear wall is excellent has been proved by chubby hysteretic curve and fine capacity of energy dissipation
本文以某大型火電廠主廠房縱向框架一剪力墻結構為原型，通過模型試驗和有限元分析，研究了縱向帶邊框柱中高剪力墻結構的抗震性能問題，主要內容有：選用1 15縮尺比把某大型火電廠主廠房縱向帶邊框柱剪力墻原型結構模擬為一個模型結構，並進行了偽靜力試驗，研究了這類縱向帶邊框柱中高剪力墻結構的開裂與破壞過程、骨架曲線、剛度退化、延性性能等問題，試驗滯回曲線飽滿，消能能力強，說明此類中高剪力墻的抗震性能較好。Second, we development the influence of flamethrower shape, root air, the obliquity of spin vane and block heat board for the air current in the firebox by simulating them through two phases calculate
然後通過兩級計算的方法，分別對不同海拔高度、噴火筒形狀、根部風大小、旋流葉片的傾角以及有無回熱板時對燃燒室空氣氣流組織的影響進行模擬。He took pains to calm aouda s doubts of a successful termination of the journey, telling her that the most difficult part of it had passed, that now they were beyond the fantastic countries of japan and china, and were fairly on their way to cited places again. a railway train from san francisco to new york, and a transatlantic steamer from new york to liverpool, would doubtless bring them to the end of this impossible journey round the world within the period agreed upon
他一次又一次他說，最困難的階段已經過去了我們已經離開了中國和日本的那些神奇莫測的地方，我們已經回到了這些文明的國度，最後只要坐上火車，從舊金山到紐約，再坐上橫渡大洋的輪船，從紐約到倫敦，這樣就毫無疑問能夠按時完成這個人們認為不可能的環球旅行了。Moreover, laser overlapping treatment is another actual problem in many places. by a lot of experiments, as be showed in many theses, we find the hardness of mould steels were lowered because of tempering
並且，激光交疊熱處理是在生產中可能發生的問題，我們通過大量的實驗發現在激光硬化區由於一定程度的回火效應而產生硬度回落現象。In the research and preparation procedure, it probes into electric field dynamic impedance variation rules, summarizing a set of sparks critical point discrimination methods in solving the key to detect electric field less - spark technology and realizing the less - sparks operation controlling function under impending arcover voltage, putting forward and realizing constant spark rate operation mode, in fiashover treatment adopting method of small descending amplitude, speedy picking up speed, and unlocking silicon controlled rectifier
在研製過程中探索了電場動態阻抗變化規律，總結出一套識別火花臨界點的方法，解決了探測電場少火花的技術關鍵，實現了逼近擊穿電壓下少火花運行控制功能，提出和實現了恆定火花率運行方式，在閃絡處理上採取下降幅度小、回升速度快、不封鎖可控硅的方法。3. regularity of some mechanics index such as compressive strength, constitutive relationship of stress to strain and modulus changing with temperature, standing time, cooling and curing process after cool were studied by test. corresponding regressive equation was obtained with large quantity of data
試驗研究了火災高溫后考慮靜置時間影響的混凝土抗壓強度、應力-應變本構關系及彈性模量等力學性能指標隨混凝土受火溫度、靜置時間、冷卻和冷卻后的養護方式的變化規律，通過對大量試驗數據的處理，給出了相應的擬合回歸公式。Concrete compression strength was predicted by artificial neural network ( ann ) considered three factors, such as temperature, standing time and cooling and curing process after cool. also it was predicted in different rebound and ultrasonic values. fire resisting performance of concrete was studied and predicted
通過人工神經網路（ ann ）方法預測了火災后考慮不同受火溫度、靜置時間、冷卻及冷卻后的養護方式三種影響因素的混凝土抗壓強度；預測了火災后考慮不同回彈值、大連理工大學博士學位論文一超聲波速值等因素的混凝上抗壓強度，研究並預測了火災后混凝土的抗火性能。It says the recall is tied to the speed control deactivation switch system, which could corrode over time, overheat and catch fire
福特公司說此次召回和速度控制怠速開關系統有關，速度控制怠速開關隨時間流逝可能會被腐蝕，最終可能導致過熱並發生火災。Based on the heating treatment control system of a spring steel - wire production line in a factory, hubei province, the paper deals with the design of fully automatically monitoring system across its manufacturing process. through research of parameters of temperature control during the period of heating, annealing and tempering in steel wire manufacturing process, the corresponding composite intelligence fuzzy controller is designed. in light with the way of fast heating, a composite intelligent fuzzy controller combined with on - off control & pi control is set up
本文以湖北某鋼絲繩廠彈簧鋼絲熱處理生產線控制系統為依託，論述了整個生產過程的監控系統的設計，通過對該類鋼絲生產中的快速加熱過程、退火、回火等過程中的溫度控制參數的研究，設計了相應的智能型復合模糊控制器，根據快速加熱過程的實現方式，對于快速反應的被控對象，給出了以模糊控制為基礎的結合開關控制、 pi控制的快速升溫，且不超調的一種智能型復合模糊控制器，對于退火、回火等工藝過程，採用電加熱方式，該類工藝過程作為控制對象屬于具有純滯后的大慣性系統，作者設計出模型預測自適應模糊控制器，並對所設計的控制器進行計算機模擬實驗，取得了滿意的效果。分享友人