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为了充分利用93W钨合金和98W钨合金两种粉末冶金材料各自独特性能优势,开发基于这两种钨合金的复合材质是非常必要的.采用自主研制的HSMZ-10型摩擦焊机,利用优选的焊接工艺参数,将93W钨合金和98W钨合金在主轴转速为2 000r/min,摩擦变形量为5 mm,摩擦压力为30 MPa,顶锻压力为60 MPa,摩擦顶锻变形速率为20 mm/s的条件下,通过摩擦焊接方法成功地实现了焊接,并对接头和母材进行了金相组织分析和力学性能检测分析.结果表明,接头力学性能良好,无未焊透等焊接缺陷;93W和98W粉末冶金材料之间无成分均一化现象,焊缝的强度大于母材. 相似文献
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搅拌摩擦焊的高效焊接问题一直是研究的焦点。对影响高效搅拌摩擦焊技术的关键因素(焊接工装、搅拌工具和焊接工艺)进行系统阐述并提出优化设计方案。结果表明,采用真空吸盘可以有效提高装卡效率,减少焊接装配时间;采用双重水冷系统和粉末冶金材料制造的搅拌工具,其有效寿命达2000m;通过优化焊接工艺,能够有效实现焊接速度1 000 mm/min的高速搅拌摩擦焊接技术,获得了最高抗拉强度接头系数为76.5%,最高屈服强度为164 MPa的焊接接头。 相似文献
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由于异种材料物理、化学性能及力学性能方面存在显著差异,导致其在焊接过程中容易出现被氧化、形成脆性金属间化合物、焊接变形严重等焊接缺陷。而摩擦焊作为一种绿色固相连接技术,因其焊接温度低、焊接质量好、焊接过程稳定等优点,已经在异种材料焊接中得到了广泛的应用。详细综述了异种材料搅拌摩擦焊、线性摩擦焊轴向摩擦焊的国内外研究进展,涉及到焊接工艺、力学性能和成分分析等方面,着重介绍了铝合金、镁合金、钛合金等轻质材料之间的摩擦焊接,并对今后的发展进行了展望。 相似文献
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《现代焊接》2014,(9):18-19
搅拌摩擦焊技术在薄壁筒体结构上的应用已十分广泛,如汽车轮毂、筒形壳体等。但由于筒体焊接工艺难度相对较大,焊接厚度一般在10mm以下。如何在大厚度筒体结构上应用搅拌摩擦焊技术,一直是专业领域内待解的难题。中航工业北京赛福斯特技术有限公司整合十二年的搅拌摩擦焊产品开发经验,依托公司领先的技术平台,通过不断的技术攻关和工艺试制,成功克服了筒体焊接厚度大、材料强度高、背部支撑困难等问题,掌握了30mm厚度的筒体环缝结构搅拌摩擦焊关键制造技术,并成功实现试验件和验证件的有效焊接,各项技术指标完全达到设计要求,作工艺复验和性能验证中也取得了令人振奋的结果。 相似文献
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通过试验研究了铁索体球墨铸铁与低碳钢异种材料的摩擦焊接头的组织性能,探讨了其摩擦焊接性。结果表明,在合适的焊接工艺参数下,球墨铸铁与低碳钢的焊接接头成型良好,具有一定的强度,采用摩擦焊的方法焊接球墨铸铁与低碳钢是可行的。 相似文献
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This paper presents a 3D numerical model to study the material flow in the friction stir welding process. Results indicate that the material in front of the pin moves upwards due to the extrusion of the pin, and then the upward material rotates with the pin. Behind the rotating tool, the material starts to move downwards and to deposit in the wake. This process is the real cause to make friction stir welding process continuing successfully. The tangent movement of the material takes the main contribution to the flow of the material in friction stir welding process. There exists a swirl on the advancing side and with the increase of the translational velocity the inverse flow of the material on the advancing side becomes faster. The shoulder can increase the velocity of material flow in both radial direction and tangent direction near the top surface. The variations of process parameters do have an effect on the velocity field near the pin, especially in the region in which the material flow is faster. 相似文献
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周军张春波杜淼赵玉珊姜子钘 《焊接》2017,(6):1-5
随着民用和军用飞机性能及使用要求不断提高,航空零部件需要满足结构轻量化、高可靠性、长寿命、经济性好等要求。焊接技术作为航空工业不可或缺的材料加工技术,在航空零部件的研制与生产中,发挥着举足轻重的作用。惯性摩擦焊、搅拌摩擦焊和线性摩擦焊作为典型的摩擦焊接工艺方法,凭借优良的技术优势,在航空发动机转子组件、飞机结构件、整体叶盘等航空零部件加工制造中得到成功应用。结果表明,随着摩擦焊接技术的进步与发展,摩擦焊接技术将有效促进航空飞机减重,进一步提高航空飞机性能。 相似文献
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This paper reports the numerical simulation of the 3D material flow in friction stir welding process by using finite element methods based on solid mechanics. It is found that the material flow behind the pin is much faster than that in front of the pin. The material in front of the pin moves upwards and then rotates with the pin due to the effect of the rotating tool. Behind of the pin, the material moves downwards. This process of material movement is the real cause to make the friction stir welding process continuing successfully. With the increase of the translational velocity or the rotational velocity of the pin, the material flow becomes faster. 相似文献
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为了研究焊接参数对摩擦塞焊焊接区域温度场的影响,建立了摩擦塞焊焊接的产热模型,并进行摩擦塞焊焊接工艺试验。通过理论分析得出焊接过程中的产热量与焊接参数的关系,试验对理论分析结果进行验证,并深入探讨焊接参数对焊接区域温度场的影响。结果表明:焊接进给速度的改变影响焊接过程中的焊接压力大小,从而影响摩擦塞焊焊接初始阶段的产热,进而影响焊接区域温度场;较高的焊接转速提高摩擦界面材料的升温速率,提高材料塑化,避免焊接缺陷;应选择适当的焊接摩擦时间,尽量匹配较高的转速以缩短焊接摩擦时间。 相似文献
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In this work fusion and solid state welding techniques for joining PM refractory metals are adressed. The weldability is discussed and evaluated by electron beam and friction welding experiments. EB-welding experiments were performed on rolled sheets made of different Mo-based materials. While a significant decrease in the mechanical properties was found for the weldments of unalloyed molybedenum and the alloy TZM, good weldability is given for Mo41Re. A welding procedure was established and used for the manufacturing of thin walled tubes. Rotary friction welding experiments were carried out on rod material of the Mo-alloys TZM and MHC. Suitable process parameter were determined and successfully transferred for the joining of tubular TZM parts. 相似文献
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Qinghua Li Fuguo Li Miaoquan Li Li Fu Qiong Wan 《Journal of Materials Engineering and Performance》2006,15(6):627-631
Friction welding is one of the most effective and widely used solid-state joining methods in modern industries. Plastic deformation
of interface material is the essence of friction welding, and welding process parameters affect the welding quality greatly.
To understand the friction welding process better, it is important to calculate the temperature, stress, and strain fields
of welding interface material in the welding process. In this paper, continuously driven friction welding of Al-Cu-Mg alloy
round bars that are commonly used in aerospace structures are calculated with the finite element method (FEM). FEM calculations
and results are explained and discussed in much detail. For example, depending on experiments as reference, FEM results show
that a temperature of 490 °C, which is below the low value of Al-Cu-Mg alloy melting point, is obtained at the end of 0.6
s of friction welding. During the whole process of friction welding, the calculated equivalent strains increase monotonously,
and the equivalent strain at the center of circular section of interface material is the largest. 相似文献
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对TiAl合金与GH3039高温合金异种材料进行了摩擦焊接工艺试验. 基于接头的拉伸性能,初步优化了焊接工艺参数. 采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对焊接接头组织、焊合区成分变化及接头连接机理进行了分析. 结果表明,TiAl合金与GH3039高温合金两种异种材料摩擦焊接具有可行性,在摩擦焊接过程中热力耦合的作用下,GH3039侧热力影响区塑性变形较大,TiAl合金侧热力影响区变形较小;TiAl合金与GH3039高温合金摩擦焊接连接界面两侧的合金元素发生了扩散,形成了复杂的层状金属间化合物组织结构;断于TiAl合金母材的焊接接头断口属于典型的脆性断口. 相似文献