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pearlite n.1.【冶金】珠澤鐵;珠光體;珠層體。2.【地質學;地...

pearlized

The change regularity for performance and microstructure of low carbon steel is summarized . the main characteristic of the process is pearlite spheroidizing , increasing of grain boundary width , element segregation and carbide in grain boundary . the change of those microstructure causes the variance of the merchant performance 通過上述的研究工作,總結了火力發電廠用低碳鋼在長期運行期間性能與微觀結構的變化規律,提出以珠光體球化、晶界寬化、元素晶界偏聚及碳化物晶界析出為主要特征的低碳鋼微結構變化規律,以及由此而引起的材料機械性能的變化。

( 4 ) which deformation behavior of cementite lamellae in pearlite colonies is closely related to the stress state of cementite which significantly depends on cementite thickness and orientation , especially on cementite thickness . ( 5 ) the lamellar cementite undergoes partial dissolution on the present deformation . the thermodynamical destability of cementite is attributed to a large number of defect in cementite introduced by severe plastic deformation providing evidence for cementite dissolution 而滲碳體的應力狀態主要是與滲碳體的片層厚度和取向密切相關的,其中滲碳體的厚度起決定性作用; ( 5 )本實驗變形條件下,滲碳體出現了部分溶解的現象,這是由于強烈塑性變形而在滲碳體中引入大量的缺陷導致其處于高能不穩定狀態從而促使了滲碳體溶解。

Abstract : for analyzing the residual stress distributing state within the weld joint , and its effect on the performance of welding structure , when welding the ferrite pearlite steel with the austenite steel , this paper develops a finite element program to compute the interface stress of two or over two material . finally , this program is used to analyze the mechanical behavior of heterogenic joint 文摘:為了分析鐵素體、珠光體類鋼與奧氏體類鋼焊接時,焊接接頭處焊接殘余應力的分布狀態及其對焊接構件性能的影響,研制了可計算兩種或兩種以上材料界面應力的有限元程序,并用此程序分析了異質接頭的力學行為。

Dried at the temperature , the film has surface with convex and concave microstructure , its hydrophobicity and surface roughness can be improved evidently by adding the bead - forming agent . ( 3 ) the self - cleaning and heat - insulated building coating with excellent hydrophobic property and gas - permeability was preparaed by using the hydrophobic additive , modified sepiolite and modified expanded pearlite ( 3 )應用疏水添加劑、改性海泡石、膨脹珍珠巖能夠制得自清潔隔熱功能涂覆材料;制備的疏水添加劑和經提純、疏水改性后的海泡石和膨脹珍珠巖,對乳膠涂料的流變性能、穩定性能以及涂膜的疏水性能、對比率和其他常規性能無不良影響。

On the surface of annealed 45 steel , as the pearlite in it contains cementite phase and has high crystal boundary density , the nucleation and growth of deposits prefer to occur at the pearlite at the beginning during depositioa the coating exists in form of nano - polycrystal layers composed by gathering of nano - sized crystals 在退火態45鋼表面,由于珠光體組織中含有滲碳體相且具有比較高的晶界密度,因而在沉積初期鍍層優先在此處形核和生長;鍍層在基體表面是以納米尺度的晶粒聚集在一起形成的聚晶體形式存在的。

It is indicated that the improved model can calculate the fraction of ferrite and pearlite more accurately , and can specially reflect the effect of both undercooling during the eutectoid transformation and the amount of graphite nodules formed during the process of eutectic reaction on the fraction of pearlite 結果表明,改進的模型可以更準確地預測球鐵中鐵素體和珠光體的數量,能夠準確地體現共析階段過冷情況和共晶球墨數對珠光體數量的影響。

The results show that small cr addition in steel can decrease the lamellar spacing of pearlite , and markedly increase strength and hardness with almost the same ductility and toughness , and accordingly improve wear and shelling - resistance of wheel steel 實驗結果顯示,加入微量的鉻,可以細化珠光體的片層間距,在保持韌塑性基本不變的情況下,顯著增加材料的強度和硬度,從而提高車輪鋼的耐磨性和抗剝離性能。

Machines in this series are applicble for continuous multicoloured on rolling materials in good printing performance such as cellphane , bopp , pvc , pet , hdpe , ldpe , pearlite film , paper . broadly applied for all of the super - quanlity priting material package 本機適用于玻璃紙bopp pvc pet hdpe ldpe珠光膜紙張等具有優良印刷性能的卷筒狀材料的多色連續印刷,廣泛應用于各種高檔次印刷品的包裝。

The main results are as the following : ( 1 ) the microstructure of lamellae pearlite has evolved ultrafine cementite particles throughout the ferrite matrix uniformly after four passes . the ferrite matrix is homogeneous grains , and average grain size is - 0 . 3um 主要結果如下: ( 1 ) ecap變形四道次后,片層狀的珠光體組織演變為了超細的滲碳體顆粒均勻分布于亞微晶鐵素體基體的組織。

The microstructure of lamellae pearlite has evolved ultrafine cementite particles throughout the ferrite matrix uniformly after five passes . the ferrite matrix is homogeneous grains , average grain size is - 0 . 3 m . 2 變形五道次后,片層狀的珠光體組織演變成了超細的滲碳體顆粒均勻分布于鐵素體基體的組織,鐵素體基體為均勻的等軸晶,平均晶粒大小為0 . 3 m 。

This comparison research including grain size , pearlite content , ferrtie microhardness , banded structure and chemical composition was carried out on hsla steel with same thickness and different mechanical properties 摘要通過對二組同一厚度、力學性能尤其是屈服強度有明顯差異的低合金鋼板進行晶粒度、珠光體含量、鐵素體顯微硬度、帶狀組織以及化學成分對比試驗。

The strength of extension of low carbon ductile cast iron can reach 750mpa in casting state , the impact ductility can reach 20j / cm2 . the diameter of graphite nodule is 5 - 20 ( am , the base body is consisted of pearlite - 低碳球鐵在鑄態下的抗拉強度可達750mpa ,沖擊韌性可達20j cm ~ 2 ,其中石墨球直徑在5 20 m ,基體以珠光體為主,有少量的鐵素體與滲碳體。

This article introduces a vacuum filler technique of expansive pearlite through analyzing the features of expansive pearlite and key technical problem of filler in the lamination of the low temperature storage tank 摘要文章通過分析充填于絕熱低溫儲罐夾層中膨脹珍珠巖的特性、充填中的重點技術問題,介紹了一種膨脹珍珠巖的真空充填技術。

In the specimen of low carbon , ferrite with low hardness and a little pearlite is found ; and the specimen of high carbon is made up of pearlite and various alloyed - carbide 組織觀察表明,碳含量較低的試樣中主要是硬度不高的鐵素體以及少量的珠光體;而碳含量較高的試樣中則主要是珠光體以及各種合金碳化物。

The microstructure evolution of ferrite and pearlite in ecap was investigated by means of optical m icroscopy ( om ) and transmission electron microscopy ( tem ) 并運用光學顯微鏡( om ) 、透射電子顯微鏡( tem )及維氏顯微硬度儀研究了ecap變形后45鋼中先共析鐵素體及珠光體組織的演變特征。

Based on the analysis of eutectoid transformation of sg ( spheroidal graphite ) iron , the numerical model of formation of ferrite and pearlite during the eutectoid transformation was improved 摘要通過對球墨鑄鐵件共析轉變的分析,改進了球鐵件中鐵素體與珠光體形成的數學模型。

These additives have no adverse effect on the properties of the coating , and the optimum contents of them are : hydrophobic additive 6 % , sepiolite 6 % and expanded pearlite 3 % 在該材料中疏水添加劑的最佳含量為6 ,海泡石最佳含量為6 ,膨脹珍珠巖的最佳含量為3 。

A new type of sound absorbing materials mainly made from low alkaline cement and expanding pearlite has been investigated on the basis of sound absorption principle 摘要以低?水泥和膨脹珍珠巖為主要原料,輔之以分散性良好的增強劑聚丙烯纖維,研制出一種新型吸聲材料。

The paper analyzes its performance with the range of the content of gas former , expanding pearlite and water - cement ratio 文中對引氣劑用量、珍珠巖用量及水灰比對材料吸聲性能影響進行了研究與分析。