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通过对大直径20MnMo锻件管板埋弧带极堆焊309LMo的焊接及生产应用的研究,合理选择过渡层焊接材料及堆焊各层的工艺规范参数,减小堆焊层合金元素稀释率,控制铁素体含量,保证了堆焊质量,解决了管板堆焊变形的问题,成功用于产品制造。 相似文献
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采用带极堆焊的焊接方法对16MnR管板进行不锈钢堆焊,主要解决的问题是:选择正确的焊接材料和焊接工艺规范,使堆焊层焊缝组织为奥氏体加3~12%铁素体的双相组织,保证其耐腐蚀和抗裂性。另外还需制定合理的焊接措施,控制管板的焊接变形。 相似文献
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《中国化工装备》2021,(5)
反应器内壁局部区域需堆焊 ENiCrMo-3(催化剂格栅支持圈及再分配盘支持圈表面、需焊接内件连接板或定位板处),其中内件连接板或定位板与堆焊层的焊接技术条件要求在最终热处理后(PWHT)进行,通过不同厚度ENiCrMo-3堆焊层在PWHT后焊接不锈钢连接件,并检测焊缝区、热影响区及母材区不同位置硬度,同时研究了不同焊接规范对焊缝区、母材及热影响区的影响,得出PWHT后在堆焊层焊接内件连接件对基材产生影响的ENiCrMo-3堆焊层的最小厚度及最佳焊接规范.以确保PWHT后堆焊层焊接内件连接件不会使母材产生新的热影响区,确保设备在高温、高压工况下的安全运行。 相似文献
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简要介绍了加氢反应类设备内壁耐腐蚀层的堆焊,通过选用特定的堆焊材料及合理的工艺参数,来实现单层堆焊的焊接技术。 相似文献
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为保证12Cr2Mo1锻件带极埋弧堆焊Inconel625质量达到设计文件要求,对锻件基材和Inconel625焊接性能进行了分析,模拟承制产品实际生产状态进行堆焊工艺评定试验,采用周向堆焊和直道堆焊相结合的方法制备评定试件,对堆焊层化学成分、弯曲性能、硬度指标、金相组织、耐腐蚀性能进行了检测。试验结果表明,采用EQ62-50/ES200的焊带/焊剂组合可以获得性能优良的堆焊层。对堆焊层进行腐蚀速率检测,其焊态试样腐蚀速率为1.50 mm/a,固溶态试样腐蚀速率为1.17mm/a,两者之比为1.28,满足JB/T 4756—2006标准规定比值小于或等于1.5的要求。根据评定合格的焊接工艺对热高分气/循环氢换热器管板进行了堆焊,堆焊产品已稳定运行三年,未出现焊接缺陷和腐蚀缺陷。 相似文献
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本文对CO_2气体保护焊焊接接头与焊条电弧焊、埋弧自动焊焊接接头的性能、可涂搪性进行了对比试验,并对CO_2气体保护焊和焊条电弧焊两种焊接方法的焊接费用作了比较,进行了搪玻璃设备上应用CO_2气体保护捍的可行性分析。 相似文献
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M. Ebner T. Schnabel B. Sternad A. Huskic K. Gaubinger 《Journal of Adhesion Science and Technology》2013,27(18):1783-1791
Friction welding of wood is an active field of research and would seem to be a potential joining technology in wood industries in the near future. Despite numerous scientific publications in this field, automated industrial applications of this technique are not common up to now. In this paper, we developed an automated welding process that can be easily implemented in industry. The use of beech wood samples is motivated because (i) this species is abundant in the forest resource, (ii) the anatomical structure is homogeneous and therefore highly suitable for the welding process and (iii) the average wood density is high. For the welding process, a sequential control was developed and four different welding modes were applied. We tested four welding modes with a constant rotation speed of the drilling machine (1800?t.mn). During the dowel insertion, the linear displacement was tested for two different constant speeds and for two varying speeds. The results of the pull-out strength test show that the forces during the welding process as well as the strength of the joints produced differ depending on the welding mode. Based on the results it can be recommended that a two-step welding process is applied for wood welding. With the two steps, the forces at the welding machine are kept low and the quality of the joint is high. The sequential control developed can be applied and adapted for different industrial applications. These findings should convince industrial decision-makers of the applicability of this process for daily production. 相似文献
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研究了玻璃纤维含量、苯胺黑色母含量、树脂相对黏度、焊接工艺(深度、振幅、压力)等因素对玻璃纤维增强尼龙6(PA6)焊接强度的影响。结果表明,玻璃纤维含量为30%的玻璃纤维增强PA6具有最大的焊接强度,为58.0 MPa;通过差示扫描量热分析发现,加入3%的苯胺黑色母能使玻璃纤维增强PA6的结晶温度从191.8℃降至173.7℃,但对焊接强度影响较小;随着树脂相对黏度从2.0提高到3.4,玻璃纤维增强PA6的结晶度从27.1%下降至16.2%,焊接强度略有提升;焊接工艺参数对玻璃纤维增强PA6的焊接强度影响较大的是振幅与焊接压力,振幅为0.4 mm时,焊接不充分,焊接强度仅为38.8 MPa,振幅为0.7 mm时,能充分焊接,焊接强度增至55.5 MPa,随着焊接压力从3.5 MPa提升到9.0 MPa,焊接强度从56.3 MPa下降至43.3 MPa。 相似文献
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对钛管焊接工艺方面做了全面介绍,并对钛材的焊接性能分析。焊接方法,设备,焊工资格,焊接要求,焊接工艺,焊接检验,焊缝返修,安全技术措施等方面做了详细描述。 相似文献