30CrMnSiA和30CrMnSiNi2A钢超高温淬火组织与性能的研究

研究了３０ＣｒＭｎＳｉＡ、３０ＣｒＭｎＳｉＮｉ２Ａ钢超高温淬火组织与力学性能关系。试验结果表明，在该钢Ａｃ３以上－２００℃超高温淬火可获得组织细小均匀的板条马氏体加残余奥氏体。控制超高温淬火加热保温时间，毁唯奥氏体化又能获得细小奥氏体晶粒，从而显著提高了该钢的强韧性。     

7Cr2WMoVSi钢热处理过程的碳化物的变化

本文研究了７Ｃｒ２ＷＭｏＶＳｉ钢热处理过程的碳化物的变化，结果表明，随退火温度降低，碳化物尺寸减小，７８０～８００℃退火获得均匀细化的球化组织；加热至９４０～９８０℃奥氏体化时，Ｍ３Ｃ，Ｍ２３Ｃ６已全部溶解，仍存在Ｍ６Ｃ和较多的ＶＣ剩余碳化物，有效地阻碍了奥氏体晶粒长大，随回火温度升高，按Ｍ３Ｃ，Ｍ２３Ｃ６，Ｍ６Ｃ，ＶＣ依次沉淀析出，各类碳化物的不同析出过程，提高了钢的回火抗力。     

30CrMnSiA钢的恒温相变超塑性

本文研究了７１０－８４０℃之间的３０ＣｒＭｎＳｉＡ钢的恒温超塑性。重点测试了在共析转变点Ａｃｌ点附近的超塑性指标。研究结果表明，３０ＣｒＭｎＳｉＡ钢具有恒温相变超塑性特性，在Ａｃｌ点温度附近材料延伸率有明显增长，流动应力最低。当初始应变速率为４．２×１０＾－４ｓ＾－１时，经预先调质处理的３０ＣｒＭｎＳｉＡ钢最大延伸率为６０８％，最低流动应力为５５ＭＰａ，与７１０－７４０℃温度区间内的研究结果相比延     

一种CrMnN不锈钢中碳化物等温沉淀动力学的研究

用膨胀仪、化学定量相分析（ＣＰＡ）及ＴＥＭ方法研究了ＺＧ０Ｃｒ１３Ｍｎ８Ｎ钢奥氏体中碳化物的等温沉淀动力学。结果表明，依据等温不同时间析出碳化物引起的Ｍｓ温度变化可更方便，更准确地测出奥氏体中碳化物等温沉淀动力学曲线；在９００￣５８０℃范围内ＺＧ０Ｃｒ１３Ｍｎ８Ｎ钢中碳化物等温析出的鼻尖温度为８００℃，相应的孕育期为２４００Ｓ；碳化物主要以Ｍ２３Ｃ６型沿晶界或夹杂物边界析出。     

正火40MnMoV钎钢的贝氏体组织

用ＴＥＭ研究了新型钎钢４０ＭｎＭｏＶ的正火组织，发现它与Ｓｉ－Ｍｎ－Ｍｏ系的另一种钎钢５５ＳｉＭｎＭｏ相似，由无碳化物上，下贝氏体Ｂｕ、Ｂｌ、以孪晶马氏体为主的“块状组织”和约１５％残余奥氏体Ａｒ组成，但４０ＭｎＭｏＶ的Ｂｕ，Ｂｌ较多，Ａｒ和Ｌ则较少；Ｂｕ板条较粗大，其间分布着不连续的Ａ小片条；Ｂｌ片中有渗碳体与粤氏体Ａ共存；Ｌ的尺寸较小，硬度较低，讨论了该钢正火时贝氏体（Ｂ）相变的原因及影响贝氏     

CrO3—NaOH晶界侵蚀剂在合金钢中的应用

以３０ＣｒＭｎＭｏＴｉＡ钢及３０ＳｉＭｎＭｏＶＡ钢为研究对象，进行了晶界侵蚀剂的试验，提出了用相补金相观察法来提高晶粒对比度的观点和方法。     

激光扫描速度对40Cr钢表面组织结构的影响

对调质态的４０Ｃｒ钢试样用ＣＯ２连续波输出激光速进行相变硬化处理，用穆斯堡尔谱学方法研究了激光扫描速度对试样表面层组织结构的影响，结果表明，４０Ｃｒ钢激光硬化层的组织为马氏体，残余奥氏体和少量未溶碳化物。随激光扫描速度增大，试样中的马氏体和未溶碳化物的含量不断增加，残余奥氏体含量则连续下降。     

热轧双相钢回火后的显微组织研究

研究了热轧以相钢Ｆｅ－０．０７８Ｃ－１．４４Ｍｎ－１．１１Ｓｉ－０．３８Ｃｒ经不同温度回火后的显微组织变化。透射电镜观察表明：热轧双相钢的组织中不可避免地混有少量珠光林（＜５％），它们对钢的基本力学性能并没有多大影响。本钢种２００℃回火组织中，马氏体基本不变化，为板条态，双相钢仍保持屈服行为；３００℃回火组织中，大量马氏体发生分解，形成碳化物，与少量珠光体交界处的马氏体首先发生分解。该温度回火完全     

超高强度钢连续冷却组织和时效反应的研究EI

观察分析了冷却速度对低合金超高强度钢（４０ＣｒＭｎＳｉＭｏＶＡ）精细组织的影响。结果表明，在冷却、低温等温（或回火）过程中，钢显微组织中的马氏体或贝氏体存在时效阶段。其组织特征为呢纹花样。α和ε间的取向不满足Ｊａｃｋ关系，它属一种新的取向关系。过渡型碳化物可直接从呢纹花样区析出。     

7Cr7Mo3V2Si钢加热相变研究

利用Ｆｏｒｍａｓｔｏｒ全自动相变测定仪研究了７Ｃｒ７Ｍｏ３Ｖ２Ｓｉ钢在连续加热条件下的相变规律及特点；测定了能反映其相变规律与特点的奥氏体形成图。结果表明，钢中球状珠光体向奥氏体的转变是在较宽的温度区间（Ａｃ１ｂ－Ａｃ１ｅ）内完成的；钢中大量合金碳化物的溶解、按其难易程度不同分别与ｎ个溶解温度相对应；连续加热条件下，奥氏体难以实现均匀化。     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in     

Systematic Approach for Emerging Industry

正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration.     

Strictest Pollutants Emission Standards

正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions.     

Instructions to Authors

New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope     

Progress on Standards Copyright Protection

正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection.