1Cr5Mo中合金耐热钢管的焊接

1Cr5Mo属于中合金耐热钢，合金元素含量和碳当量高，焊接性差。采用母材加工焊丝的方法替代标准焊丝，克服了采购不到焊接材料的困难，解决了生产急需。通过试验研究，制订了合理、可行的焊接工艺，生产出质量合格的产品。     

Cr5Mo炉管的焊接

本公司承担了50万t/年常压加热炉辐射室炉管更换工作,辐射室炉管的介质为闪底油;工作压力1.5M Pa;介质出口温度365℃。炉管材质为15CrM o,规格为114m m×10m m,属于低合金耐热钢;弯头材质为Cr5M o,规格为114m m×10m m属于中合金耐热钢,有较好的高温耐热性和高温耐氧化性。1C r5M o钢的焊接性分析由于Cr5M o钢中Cr,M o含量较高及含有一定量的C元素,致使钢材具有较高的淬硬性,对焊接冷裂纹非常敏感。当焊后冷却时发生贝氏体转变,在弧焊热影响区形成贝氏体和部分马氏体组织,硬度可达H B370以上,冷裂纹倾向严重,钢材焊接性较差。因此对焊…     

1Cr5Mo珠光体耐热钢管的三种不同工艺研究

通过分析1Cr5Mo钢的焊接性,介绍了当前应用于该钢种的三种不同的焊接工艺方法.通过比较三种焊接工艺方法所获得焊接接头性能差异和特点,提出在具备焊后热处理条件和大规模施焊情况下应尽可能采用同质材料进行焊接,以避免接头在运行中出现早期失效,降低焊接成本.在不具备热处理条件或现场维修量少的情况下,也可采用异质材料进行焊接....     

9Cr—1Mo钢炉管焊接工艺的探讨

本文介绍了9Cr-1Mo钢的焊接工艺特点,在同材焊接条件下,对9Cr-1Mo钢炉管焊接工艺作了进一步研究和探讨,并在南京烷基苯厂七万二工程F301炉改造中应用,达到了国外工艺水平。     

9Cr—1Mo炉管焊接工艺的评定

通过对９Ｃｒ－１Ｍｏ炉管焊接工艺评定及实践证明，采用小线能量焊接，焊前预热３００℃，焊后后热３５０℃×４０ｍｉｎ。焊后消应力处理为７２０℃×４０ｍｉｎ的焊接工艺是可行的。     

1Cr5Mo与20钢管异种接头的焊接

通过１Ｃｒ５Ｍｏ与２０钢管的焊接试验，选择了Ｊ５０７焊条为该异种接头的焊接材料，并给出了防止裂纹、保证工程焊接质量的有效工艺措施。试验结果在工程中得到应用并取得了满意效果。     

1Cr13Mo马氏体不锈钢的焊接工艺研究

1Cr13Mo不锈钢是以马氏体组织为基体的不锈钢,具有很好的力学性能,但是其焊接性能较差,在一定程度上了限制了其应用.本文在研究1Cr13Mo不锈钢焊接特性的基础上,提出了其焊接的工艺方案,大大提高了焊接的成品率和焊接质量,具有很大的借鉴价值.     

Cr5Mo渗硼钢管与1Cr18NigTi钢板的焊接

介绍了Cr5Mo渗硼钢管与1Cr18Ni9T隔板连接角焊缝产生严重裂纹的原因，给出了防止裂纹、保证焊接质量的有效工艺措施。     

板厚40 mm的1Cr5Mo与16MnR异种钢焊接工艺

针对板厚为40mm的1Cr5M0(Ⅳ级锻件)和16MnR的异种钢焊接,在产品无法进行焊后热处理的情况下,从选择合适的焊接方法、焊接材料、坡口形式、预热和焊接工艺参数等方面分析、探讨,确定了合理的焊接工艺,并成功应用于产品的焊接.     

P91与ZG15Cr2Mo1异种钢焊接工艺

将P91和ZG15Cr2Mo1异种钢焊接工艺应用于新型300MW火力发电机组重要部件中，针对两种钢的特点，确定了合适的焊接材料和具体可行的焊接工艺，取得了令人满意的效果。     

0Cr18Ni10Ti厚壁钢管的一种焊接新工艺

某石化公司炼油厂改、扩建工程使用的 0Cr18Ni10Ti厚壁钢管 ,规格为2 73mm× 18mm。该管线焊接质量的好坏将直接影响到工程的总体质量和生产的安全运行 ,而打底焊技术是保证其焊接质量的关键。以前传统工艺 ,重要焊件都是GTAW焊打底 ,背面充氩保护 ,不用焊丝或采用实心焊丝。这里介绍的工艺是采用药皮焊丝GTAW打底 ,进行了水平固定管的手工全位置焊接 ,背面无需充氩保护 ,减少了辅助工作时间 ,焊缝质量优良。1　焊接工艺1.1　焊接方法0Cr18Ni10Ti是奥氏体不锈钢 ,根据奥氏体不锈钢的焊接特点 ,考虑到管壁较厚 ,散热相对较快 ,选用G…     

Highly efficient TIG welding of Cr13Ni5Mo martensitic stainless steel

A double-shielded TIG welding process using pure He gas as the inner shielding layer and He and CO₂ mixed gas as the outer shielding layer was proposed for the welding of Cr13Ni5Mo martensitic stainless steels. This proposed welding process can successfully address the problem of electrode oxidation with mixed-gas TIG welding and the issue of low weld depth and welding efficiency of traditional TIG welding. A change in the direction of the surface tension convection mode was the primary mechanism that affected the fusion zone profile. When the oxygen content in the weld pool was in the range of 80–120 ppm, the surface tension convection direction changed from outward to inward, resulting in both a larger weld depth and a larger weld depth/width ratio. This process not only allows for a high welding efficiency comparing with traditional TIG welding but also produces better weld impact properties than those of MAG welding (metal active gas welding).     

2.25Cr-1Mo不锈复合钢板厚壁容器的焊接

主要介绍了2.25Cr-1Mo不锈复合钢板的焊接工艺试验和工艺评定，阐明了2.25Cr-1Mo锈复合钢板焊接工艺的可行性，实践证明，该工艺能满足使用要求。     

高温焊接对1.25Cr0.5Mo焊接构件疲劳寿命的影响

选取不同的温度(550,650,750,850℃)对1.25Cr0.5Mo钢进行高温焊接,在高温焊接及常温焊接后对焊件进行残余应力测试和疲劳试验.结果表明,550,650,750,850℃高温下焊接的试件,其焊缝热影响区的残余应力最大值(纵向、横向)比常温下焊接焊缝热影响区残余应力最大值(纵向、横向)都显著降低:纵向和横向降低幅度分为50.1%,48.9%;74.8%,67.4%;83.9%,79.4%;91%,89.7%.高温焊接试件的疲劳寿命的平均值比常温下焊接试件疲劳寿命的平均值分别提高31.02%,38.84%,47.23%和62.28%.结果表明,高温焊接能明显降低焊件的残余应力和提高焊件的疲劳寿命.     

Investigation of welding procedure of 9Cr－1Mo steel for manufacturing petrochemical equipment

Ｉｎｖｅｓｔｉｇａｔｉｏｎｏｆｗｅｌｄｉｎｇｐｒｏｃｅｄｕｒｅｏｆ９Ｃｒ－１Ｍｏｓｔｅｅｌｆｏｒｍａｎｕｆａｃｔｕｒｉｎｇｐｅｔｒｏｃｈｅｍｉｃａｌｅｑｕｉｐｍｅｎｔ￥ＨｕａｎｇＹｕｎｑｉｎｇａｎｄＣｈｅｎＢｏｌｉ（ＴｓｉｎｇｈｕａＵｎｉｖｅｒｓｉｔ...     

1Cr18Ni9Ti不锈钢厚壁管全位置焊

1　焊接性分析(1) 1Ｃｒ18Ｎｉ9Ｔｉ不锈钢133ｍｍ× 11ｍｍ大管水平固定全位置对接接头主要用于核电设备及某些化工设备中需要耐热耐酸的管道中 ,焊接难度较高 ,对焊接接头质量要求很高 ,内表面要求成形良好 ,凸起适中 ,不内凹 ,焊后要求ＰＴ、ＲＴ检验。以往均采用ＴＩＧ焊或手工电弧焊 ,前者效率低、成本高 ,后者质量难以保证且效率低。为既保证质量又提高效率 ,采用ＴＩＧ内、外填丝法焊底层 ,ＭＡＧ焊填充及盖面层 ,使质量、效率都得到保证。(2 ) 1Ｃｒ18Ｎｉ9Ｔｉ不锈钢热膨胀率、导电率均与碳钢及低合金钢差别较大 ,且熔池流动性差…     

0Cr13不锈钢板材对接接头的焊接工艺

关于0Cr13不锈钢焊接工艺的资料很少,针对0Cr13的钢种界定也有不同的观点。在设计或业主没有特殊要求的情况下,制造单位普遍采用JB/T4709-2000推荐的Cr-Ni不锈钢焊材进行施工。通过实际生产、力学试验和金相试验,较为系统地论述了0Cr13不锈钢板对接接头的焊接工艺评定过程和结果。     

紫铜与低碳钢厚板搅拌摩擦焊工艺分析

用搅拌摩擦焊方法成功焊接了 10 mm 厚的紫铜与低碳钢板,得到了内部无缺陷、外观成形良好的接头.紫铜位于搅拌摩擦焊返回边时,能使焊缝形成良好接头.反之,位于前进边时则有沟槽和未焊合等缺陷.右旋螺纹搅拌针会使焊缝材料向上作螺旋形运动,接头有明显的轴肩影响区,缺陷容易在焊缝底部出现.左旋螺纹搅拌针使搅拌针周围的塑化金属向下迁移,在焊缝下部形成明显的呈"洋葱环"形焊核区,缺陷容易在焊缝上部出现.搅拌针偏移量对焊缝形貌有较大影响.接头抗拉强度达 233 MPa,为铜母材强度的 95%,断裂位置在铜侧热影响区.焊核区抗拉强度达 296 MPa,远超过紫铜母材的强度.

Abstract：

The joining of dissimilar metals, T2 copper and Q235 mild steel plates with 10 mm thickness, is carried out in friction stir welding. Excellent welds can be gained when copper is fixed at the retreating side, but defects can be produced in welds when copper is fixed at the advancing side. The pin shapes influence the flow of the plasticized metal in the weld, which results in the variety of the morphology of the weld. If the screw thread on the pin is clockwise, the metal around the pin will move upwards to the root of the pin, which causes that the shoulder affected zone is clear and the weld defects would form at the lower part of the weld section. If the screw thread on the pin is counter-clockwise, the metal around the pin will move downwards, which drives the metal around the pin tip to move around and upwards. The onion ring pattern, which appears like lamellar structure, is observed in the stir zone. The shoulder-affected zone is not clear; the weld defects will form at the upper part of the weld section. Various pin offsets will affect the flow of weld metal. If an optimization of the process parameters is performed, defeet-free joints can be formed. The tensile test results show that the maximum joint tensile strength can reach 233 MPa, which is 95% of the parent materials of copper, and the fracture happens in the HAZ of copper. The maximum tensile strength of the nugget zone can reach 296 MPa, which is very considerably larger than that of the parent materials of copper.