大型锻件锻造工艺计算机优化设计

用ＶＢ６．０和ＡｕｔｏＣＡＤ２０００开发了大型锻件计算机优化设计软件,利用该进行大型锻件锻造工艺的设计,不仅可以提高设计效率,钢锭的锭型及锻比选择上进行了优化,使设计出的锻压工艺更科学合理,该软件适用于冶金行业大型锻件设备快锻快,水压机的锻造工艺规程设计。     

大型长轴类GH4169合金锻件的成形工艺

介绍了大型长轴类GH4169合金锻件的成形工艺,分析了锻件锻造成形存在的困难.在工艺制定及模具设计上采用特殊优化工艺和相应的措施,成功地锻造了外形尺寸和各项性能均合格的锻件,为同类产品的锻造生产提供了参考依据.     

GFM精锻机及其工艺特点

前言一九八一年,我厂从奥地利GFM公司引进了一台S×40型精锻机,并于次年投入试生产。此期间,从参阅资料、与外国厂商洽谈以及初步的生产实践中,获得了一点支离破碎的感性知识。现将它整理出来,供同行参考并以此征得批评和帮助。一、精锻机的发展历史及近况精锻机在我国,除了叫精锻机外,还有叫旋转锻机、曲轴锻造机、经向锻机或精密锻轴(管)机的。GFM精锻机是奥地利希太     

中国大型铝合金等关键件模锻工艺取得重大进展

日前,作为"高档数控机床与基础制造装备"国家科技重大专项的重要内容之一,由中国第二重型机床集团公司承担的"大型关键件模锻工艺技术"课题研究取得了重大进展.该课题重点围绕大型航空模锻件热模锻近净成形技术,结合正在建设的800MN大型模锻压机,开发出复杂精密航空锻件的近净成形新技术,解决了大型模锻工艺基础共性技术和关键技术问题.突破了大型钛合金、铝合金锻件的整体成形技术,在航空用典型钛合金、铝合金、高强钢的基础数据测试,锻造成形过程的无网格法模拟技术研究,钛合金典型结     

BT25钛合金压气机盘等温精锻件的研制

采用等温锻造工艺成功地试制出BT25钛合金精密锻件，锻件的各项性能指标全部满足技术条件的要求，且锻件的加工余量小、材料的利用率高、组织和性能稳定。     

大型轴类锻件锻透压实技术的研究

大型轴类锻件是大型锻件中的典型代表之一,其锻造工艺有其特殊性,锻造过程控制难度较大,容易导致锻件横向力学性能不合格、超声波探伤不合格及粗晶、混晶现象的发生从而导致废品。尽管很多学者对此进行了大量的研究,并提出了一些工艺方法,但在实际应用中的效果并不是太好,其中一个很大的问题是定性的原则多,缺少具有可执行性的定量标准。本文采用任猛提出的"有效压实工艺准则",使得轴类锻件的工艺编制有了定量标准,能够指导制定详细的、具有很强操作性的锻造工艺,用来指导生产,确保了锻件生产的高质量和稳定性。     

可控温煤气锻造加热炉的设计与应用

针对高合金钢锻件锻造加热工艺的特殊要求,设计出可存储锻造加热工艺曲线,并能自动跟踪工艺曲线升温、保温、控温的煤气锻造加热炉.     

我国唯一一台GFMSKK06型精锻机已步入正常生产

<正>陕西斯坦特生物科技有限公司投资引进的GFM SKK06型精锻机于2014年8月进行调试,2014年10月开始正式生产。截止到目前已生产出5 000余件不同形状及不同应用领域的精密锻件。陕西斯坦特生物科技有限公司成立于2013年,位于宝鸡市眉县金渠镇霸王河工业区。投资伍仟万元,引进了奥地利GFM SKK06型精锻机,同时装备了中频感应加热炉、1 000 t锻压机、250 t压力机、数控铣切加     

油泵齿轮轴精锻成形工艺研究及缺陷分析

针对油泵齿轮轴特殊形状设计了齿轮轴精锻模具.通过有限元仿真和精锻实验研究了齿轮轴成形过程和金属流动规律.分析了对油泵齿轮轴精锻工艺中产生齿形角隅填充不满缺陷的原因:角隅填充是成形终了时成形载荷陡增的主要原因之一,由于齿轮轴精锻模具结构的特殊性,其强度无法满足齿形角隅填充所需高成形载荷的需要.基于角隅填充状况,提出了齿形端面斜面分流和环形槽分流,并对传统精锻工艺和两种分流锻造工艺进行了有限元仿真.分析结果表明两种分流方法均能有效减小齿形角隅填充时金属流动阻力,保证齿形良好填充,降低成形载荷,并且斜面分流优于环形槽分流.锻造实验验证了有限元仿真的准确性.      

横向锻造成型工艺研究

根据用户咨询的30CrMnSiNi2A模块类锻件的性能要求具有方向性,设计了横向锻造成型工艺。通过检验,其力学性能结果完全能够满足技术条件要求。结果表明,通过横向锻造成型工艺,控制锻造时的金属流动,改变锻件的纤维组织方向。能够使锻件综合力学性能提高,满足设计要求。     

钛合金特大型锻件生产的新途径

随着航空新技术的发展,钛合金锻件大型化是必然趋势.在各种锻造方法中,等温锻造技术的高质量、低成本优势明显地优于其他方法.在成功生产大型钛合金等温锻件的基础上,建立更大的压机和配套设备生产特大型钛合金锻件,等温锻造是一条很好的新途径.     

节能低成本高品质非调质钢的研发

 结合近年来国内外的发展趋势,从化学成分的精确稳定控制、硫化物控制,前轴、半轴和胀断连杆等典型零部件用非调质钢的开发,及非调质钢的长疲劳寿命化技术等方面对中国近年来非调质钢的部分研发工作进行了综合论述。为了进一步提高非调质钢的技术经济性,非调质钢的少无微合金化元素的低成本化、精确成分和尺寸控制是其中的重要发展方向。此外,随着冶金生产和零件制造技术的不断进步,为了替代调质处理的合结钢等以制造更多的保安件,具有更高的强韧性配合的贝氏体型非调质钢必将得到更多的应用。     

Precision forging of a high strength superplastic zinc-aluminum alloy

Precision forgings can be produced in a high strength zinc aluminum alloy exhibiting superplasticity by means of an isothermal forging cycle which combines an approach at constant speed followed by a dwell at constant load. This study shows that integral threads, sharp corners, and very thin webs can be formed directly in the forging operation. A pressure compensated time parameter is developed which permits forging operations over a range of different conditions to be correlated. This parameter may be used to predict the result of actual precision forging processes from scale model tests. Formerly with St. Joe Mineral Corp.     

铝合金锻压生产现状及锻件应用前景分析

全面系统深入地介绍和论述了铝合金锻压生产在国民经济中的重要地位,生产现状及发展水平,分析了锻件的市场需求及应用前景,建议我国抓紧建设几条大、中型铝合金锻压生产线是十分必要的,这对国民经济的高速持续发展和国防军工现代化有重大的现实意义和长远意义。     

Process Design and Tooling Configuration for Precision Forging of High Performance Components

Precision forging is a production process which uses forming technology for manufacturing near‐net shaped, highly loaded components. In comparison to conventional forming and machining production processes, an improvement in material savings and a significant shortening of the process chain can be obtained. Subsequent to the forming and the integrated heat‐treatment process, often only a final hard‐finishing of specific functional surfaces with minimum cutting volumes is necessary. The increased demands on dimensional and geometric accuracy from precision forgings result in increased requirements from the applied forging tools, the forming machines as well as from the specific design and control of the process. Therefore the Finite Element Analysis (FEA) is an appropriate simulation tool. Aims of the current research are the development of strategies for comprehensive process design and shrinking correction as well as the enhancement of the machines and tooling technologies for precision forging. Precise tool design requires a detailed knowledge about material specific heat balance resulting in a process and tool related heat transfer.     

Technology innovations on high quality special steel products

Because special steels are the basic materials for industrialization,a national R&D program on special steel technology for high quality products have been granted to promote the special steel production and applications since 2008.Since then,great progresses have been achieved on ferritic stainless steel sheets,heat resistance steel pipes and tubes,microalloyed forging steel bars,and mould steel forgings for hot working. The ratio of ferritic stainless steel sheets produced by TISCO and Baosteel has been promoted through technology innovations and increased 42%and 48 in 2009 respectively.439M steel sheets have been used to exhaust system,and 444 steel sheets have been applied to kitchen and architecture.The production technologies for heat resistance steel pipes and tubes(T/P92,S3043,S31042 steels) have been developed in Baosteel and Pansteel to meet the market requirements.Meanwhile,the round bloom technology has been initiated in Xingcheng Steel.The new technologies for microalloyed forging steels,low cost steel bar,and tailored steel and components,were proposed by CISRI based on the understanding of precise chemical composition and segregation control.And the applications of microalloyed forging steel bars have been promoted remarkably.The researchers have developed high quality mould steel technologies,heavy section forgings of 718 steel,high premium H13 steel blocks and large diameter mandrels used for seamless pipe rolling.The technology innovations of the program could lead to the progress of production technology in special steel sheets,pipes,bars and forgings,and meet the demands from market.For the moment,it is actually believed that there still strong requirements for the technology innovations on special steels.     

美标H13热作模具钢的锻造工艺优化

莱钢开发了美标H13热作模具钢并对锻造工艺进行了优化,优化后的锻造工艺采用三火成形,加热温度1260℃,锻造过程合理控制砧宽比、料宽比等工艺参数,提高锻件中心压实效果,锻后快冷并采用合理的球化退火工艺抑制网状碳化物析出,组织均匀,锻件的各项技术指标均完全满足技术要求。     

变形方式和变形程度对锥环组织和性能影响的研究

分析了变形方式和变形程度对大型锥环形锻件组织和性能的影响并制定较佳锻造工艺。     

Development of ring forgings in Ti-6Al-4V alloy for aero-engine applications

Titanium base alloy-Ti-6Al-4V [Ti-64] is extensively used in aero gas turbine [Kaveri engine] for various applications. Majority of the wrought Ti-64 components in the engine are processed through ring rolling/ forging route. Indigenous development and productionisation of the ring forgings have been carried out using the ring rolling mill and allied forging facilities of M/s HAL (F&F), Bangalore / M/s Echjay Industries, Rajkot. Type certified indigenous Ti-64 forging stock [of size up to 250mm diameter] from M/s Mishra Dhatu Nigam Ltd. [MIDHANI], Hyderabad has been used for the development and subsequent productionisation. Satisfactory metallurgical and mechanical properties have been achieved in Ti-64 alloy ring forgings, as per the release specification. Total 79 batches of 29 varieties of the Ti-64 ring forgings for Kaveri engine have been indigenously produced and supplied. This paper presents details of the work done for the indigenous development of Ti64 ring forgings of various sizes for Kaveri engine.