18cr2ni4WA-18cr2ni4WA//18cr2ni4WA-18cr2ni4WA

18Cr2Ni4WA鋼含有較多的Cr、Ni等合金元素, 具有優(yōu)良的力學性能和工藝性能,被廣泛地用于制造高速、重載條件下的船用發(fā)動機、航空發(fā)動機、坦克發(fā)動機及其它大型機械的主要承載件,如曲軸、套齒、轉接盤、法蘭盤等。其可貴之處不僅在于該鋼具有良好的強韌性、低溫沖擊韌度、回火穩(wěn)定性以及較低的回火脆性和缺口敏感性,而且還在于獲得上述性能時,并不需要在淬火硬化時采用急冷措施。因為18Cr2Ni4WA鋼所具有的高淬透性,會使其在空冷時即可淬透。因此,對于截面較大、重載、使用溫 度變化大、形狀復雜、精度高的工件,是不可替代的 理想材料。但是,18Cr2Ni4WA鋼中的粗大晶粒組織會顯著降低鋼的強度和韌性,而且其顯微組織的遺傳傾向較大,該鋼的組織晶粒一旦粗大化,就很難通過一次正火徹底消除。本文力求從18Cr2Ni4WA鋼的熱處理工藝出發(fā),研究其對顯微組織和力學性能的影響。

18Cr2Ni4WA steel containing more Cr, Ni and other alloy elements, with excellent mechanical properties and process performance, is widely used in the manufacture of high speed, heavy load conditions of marine engine, aviation engine, tank engine and other large machinery main bearing parts, such as crankshaft, gear, transfer plate, flange plate, etc.. Its valuable not only in that the steel has good toughness, low temperature impact toughness, tempering stability and lower tempering brittleness and notch sensitivity, but also to get the above performance, do not need to use emergency cooling measures when hardening. Because the 18Cr2Ni4WA steel has a high degree of quenching, it will be able to quench the air cooling. Therefore, for the large section, heavy load, the use of temperature changes, the shape of complex, high accuracy of the workpiece, is an irreplaceable ideal material. However, coarse grains of 18Cr2Ni4WA Steel will significantly reduce the strength and toughness of steel and the microstructure of genetic predisposition larger, the grain of the microstructure of the steel once coarsening, it is difficult to pass a normalizing completely eliminated. In this paper, the effect of heat treatment process on Microstructure and mechanical properties of 18Cr2Ni4WA steel was studied.

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特殊鋼

蘇州倍徠斯特殊鋼事業(yè)部主要加工銷售進口國產寶鋼、東北特鋼(撫順特鋼)、長鋼、首鋼、馬鋼、沙鋼、杭鋼、南鋼,以及進口鋼廠德國蒂森克虜伯鋼鐵、韓國浦項鋼鐵、德國撒斯特、日本新日制鐵、美國鋼鐵、日本大同/日立、美國芬可樂、奧地利百祿、瑞典一勝百等各大著名鋼廠的優(yōu)質鋼材,長期大量供應現貨：
碳素結構鋼Q235、Q345(A/B/C/D),SS300,S185等;
優(yōu)質碳素結構鋼65Mn,C10E,等;低合金高強度結構鋼Q295,S690Q,550,等;
合金結構鋼cr、mn、crmo、crmn、crni、crnimo、crmov、crmnmo、crmnsi、crnimov等系列合金鋼：20cr~40cr、12~15crmo、20crmo、30crmo、35crmo、40~42crmo，42crmo4、20crmo4、4140、4118、4135、SCM415、SCM420、SCM430、SCM435、SCM440、12crmov、12cr1mov、35crmov、25cr2mov、25cr2mo1v、38crmoal、21crmov5-7、31crmov9、SACM645、41cralmo7、15crmn、20crmn、16mncr5、20mncr5、20crmnti、30crmnsi、35crmnsi、20crmnmo、40crmnmo、30crmnti、20crni、40crni、45~50crni、12crni2、12crni3、14nicr14、14nicr10、SNC415、SNC815、20crni3、30crni3、SNC631、37crni3、SNC836、15nicr13、12cr2ni4、20cr2ni4A、3316、3325、8640、4720、14nicr18、20crni2mo、sae4320、SNCM420、SNCM220、20crnimo、SAE8620H、aisi4340、SNCM439、40crni2mo、40crnimo、36crnimo4、34crnimo6、36crnimo16、40crnimo6、45crnimov、18cr2ni4wA、25cr2ni4wA、SAE8720等
易切削鋼Y12、Y12Pb、Y15、Y15Pb、12L14、1215，9smn28、9smn28K、11smn30、Y40mn、Y20,等;
彈簧鋼65Mn,60si2mn、60si2cr、SUP7SUP2,SUP10,6150等;
軸承鋼Gcr15、G20crnimo、Gcr18、Gcr18mo、100Cr6,52100,9Cr18Mo等;
合金工具鋼9SiCr,3cr2w8v、SKD11,SKD61、4crw2si、5crw2si、6crw2si、9cr2mo、9cr2、cr12、
cr12mov、5crnimo、90sicr5、3cr2mo、3cr2nimo、H13、SKD5、5crmnmo等;
碳素工具鋼SM55,S45C,T7A、T8A、T8Mn，T10A,SM45,SM48等;
高速工具鋼6542,W18cr4v、YXR3、YXM1、ASP2023、T4,SKH2,T15等。

央廣網臨沂9月25日消息（記者車麗）據中國之聲《央廣新聞》報道，環(huán)保部日前發(fā)布通知稱，山東省臨沂市大氣污染問題的整治基本達到督辦要求。經研究，現在決定對山東省臨沂市大氣污染問題解除掛牌督辦。

   今年2月份，環(huán)保部曾在山東臨沂等地開展專項督察行動，發(fā)現山東臨沂市13家企業(yè)存在環(huán)保問題。隨后，臨沂市就成立了以市政府主要負責人為組長的大氣污染防治攻堅行動領導小組進行“鐵腕治污”。現在環(huán)保部華東督查中心6月29日至7月2日對山東省臨沂市約談整改情況的督察結果顯示，臨沂大氣污染綜合整治取得了扎實成效，企業(yè)環(huán)境違法行為也得到有效遏制，一些歷史遺留問題逐步得到解決，環(huán)境質量明顯改善。

其實早在8月21日，2月份被責令改正的臨沂三德特鋼就已恢復正常生產；9月17日，臨沂華盛江泉集團所屬臨沂江鑫鋼鐵有限公司年產280萬噸鋼鐵項目環(huán)保備案工作也順利通過山東省環(huán)境保護廳核準批復。近期，關于“臨沂藍”的照片也不斷在朋友圈、微博刷屏，種種跡象也表明此次臨沂鐵腕治污取得了階段性成果。

   環(huán)保部此次發(fā)布的通知說，山東省環(huán)保廳督促臨沂市人民政府和有關部門積極開展整治，并且向環(huán)保部提交了解除掛牌督辦的申請，現在環(huán)保部華東環(huán)境保護核查中心對案件的整改情況進行核查，目前山東臨沂的大氣污染防止情況，基本上符合了督辦的要求，所以經研究決定，環(huán)保部決定對山東臨沂的大氣污染問題解除掛牌督辦。環(huán)保部還要求，山東環(huán)保廳來督促臨沂市人民政府針對相關企業(yè)違規(guī)項目的不同情況，盡快地進行分類處理，分別予以淘汰、規(guī)范和完善，并且按照山東省政府規(guī)定的時限來完成清理整改的任務。

CNR Linyi September 25 news (reporter Li car), according to voice of China "center wide news" report, Ministry of environmental protection recently released a notice that, Linyi City, Shandong Province, the problem of air pollution remediation basically meet the supervision requirements. The study, now decided to Shandong city in Linyi province to supervise the handling of the problem of air pollution release.
In February this year, the Ministry of environmental protection in Linyi, Shandong and other places to carry out special inspectors action, found in Linyi, Shandong City, 13 enterprises in the presence of environmental protection. Subsequently, Linyi City on the establishment of the municipal government in order to mainly responsible for human head of the leading group for the prevention and control of atmospheric pollution crucial action "iron fist pollution. Now East China Ministry of environmental protection supervision center on June 29 to 7 July 2, Linyi city of Shandong Province interviewed rectification of inspectors results display, Linyi atmospheric pollution remediation achieved solid results, corporate environmental violations have been effectively curbed, some historical legacy gradually resolved, environmental quality improved significantly.
In fact, as early as August 21, February is shall be ordered to make a rectification of Linyi Sande steel had returned to normal production, September 17, Linyi Huasheng Jiangquan group belongs to the Linyi Jiangxin Iron & Steel Co., Ltd, an annual output of 280 million tons of steel project environmental record also successfully by Shandong Provincial Environmental Protection Bureau nuclear quasi approval. Recently, a "Linyi blue" photos also unceasingly in the circle of friends, microblogging scraper, all the signs also shows that the Linyi iron pollution has achieved initial results.
The Ministry of environmental protection issued a notice said that hall of Shandong Province Environmental Protection supervise Linyi Municipal People's government and the relevant departments actively carry out the rectification, and to the environmental protection department submitted to terminate the supervise the handling of the application, now Ministry of environmental protection in East Environmental Protection Verification Center on the case of the rectification for verification, the pollution of the atmosphere of Linyi in Shandong to prevent the situation from, basically conforms to the supervision of the requirements, so it was decided, the Ministry of environmental protection decided in Linyi, Shandong Province's air pollution problem is removed to supervise the handling. The Ministry also asked, Shandong environmental protection agency to urge the people's Government of Linyi city for the relevant enterprises in different conditions, as soon as possible to carry out classification, to be eliminated, standardized and improved, and in accordance with the Shandong provincial government to complete the task of cleaning up the rectification.