焊接接头

Butt Weld and docking and corner combinations Weld, in Weld ends located arc plate and extraction plate in igniting board then leads to the welding seam, joint halfway shall weld joints in front of 2.0 mm Department Firing arc, welding pieces after preheating rod will return to weld the origin, pool filled to the required thickness, before forward welding; Welding speed : Isokinetic welding requirements to ensure weld thickness, width uniform, which masks to look for hot metal and slag bath equidistance (2-3 mm)%; Arc welding rod length : different models and determined that the general requirements of arc length is stable, acid electrode generally 3-4 mm, 2-3 mm normally alkaline electrode%; Welding perspective : According to determine the thickness of two pieces of welding, welding angle has two aspects : First, the angle between the direction of the rod and welding of 60-75 ; The second is the angle between two electrodes and welding around, the same thickness as welding, welding and welding pieces incident angle of 45 ; When the thickness ranging from welding, welding electrode and thick and thin pieces of welding electrode side angle greater than the angle between the side pieces; Arc : admission to the end of each weld should be filled crater, in the direction opposite to the direction of the back-arc welding, arc welding unchanged inside pit in 1974, to prevent the crater bite of meat.

对接焊缝及对接和角接组合焊缝，在焊缝两端设引弧板和引出板，必须在引弧板上引出后再焊到焊缝区，中途接头则应在焊缝接头前方15～20㎜处打火引弧，将焊件预热后再将焊条退回到焊缝起始处，把熔池填满到要求的厚度后，方可向前施焊；焊接速度：要求等速焊接，保证焊缝厚度、宽度均匀一致，从面罩内看熔池中铁水与熔渣保持等距离（2～3㎜）为宜；焊接电弧长度：根据焊条型号不同而确定，一般要求电弧长度稳定不变，酸性焊条一般为3～4㎜，碱性焊条一般为2～3㎜为宜；焊接角度：根据两焊件的厚度确定，焊接角度有两个方面，一是焊条与焊接前进方向的夹角为60～75 ；二是焊条与焊接左右夹角有两种情况，当焊件厚度相等时，焊件与焊件夹角为45 ；当焊件厚度不等时，焊条与较厚焊件一侧夹角应大于焊条与薄焊件一侧夹角；收弧：每条焊缝焊到末尾，应将弧坑填满后，往焊接方向相反的方向带弧，使弧坑甩在焊道貌岸然里边，以防弧坑咬肉。

The mechanical properties and microstructure of the joints joined by the new developed filler metal and TC18 filler metal were compared,the results showed that only the strength of the joint joined by TC18 filler metal was satisfied,while the comprehensive mechanical properties of the joint joined by the developed filler wire were ideal.

对采用研制的焊丝和采用TC18同质焊材钨极氩弧焊焊接TC18钛合金的接头力学性能及微观组织进行了对比研究，结果表明：采用同质焊材焊接TC18钛合金只能保证接头的强度指标，而采用研制的新型焊丝焊接TC18钛合金，可以保证接头具有优良的综合力学性能。

The results demonstrate that welds with good appearances could be obtained when welding with the appropriate processing parameters. The as-welded joint tensile strength without filler wire is 180.7 MPa, while the tensile strength is 190 MPa when welding by one side with the filler wire of AlSi12 or AlMg4.5MnZr.

研究结果表明，在合适的工艺参数下，可以获得表面光洁、正反面焊缝成型良好的对接接头；焊态下，单面焊接不填充焊丝的接头强度为180.7 MPa；单面焊接填充AlSi12，AlMg4.5MnZr焊丝的接头强度最低为190 MPa，且两种填充焊丝接头的拉伸强度无明显差异；双面焊接填充AlMg4.5MnZr焊丝的接头强度达到200.7 MPa，约为母材的90%。

In this paper, with an original designed tool and selected welding parameters, 2024-T4 aluminum alloy sheets were friction stir welded successfully. A series of weld experiments were performed; the microstructure and the mechanical properties of the joints were analyzed. The influences of the welding parameters upon the quality of the joints were studied. The optimized welding parameters window was obtained in which high quality joints can be made and the tensile strength of the optimized joints were more than 80% of that of parent metal. The residual stresses of FSW joints have been investigated by using the Hole-drilling method.

本文自主设计搅拌头，通过选择合适的工艺参数，成功实现了硬铝合金2024-T4板材搅拌摩擦焊接；通过对接头成形和微观组织的研究得到可以实现焊接的工艺参数范围和工艺参数对接头成形的影响规律，并结合接头力学性能研究形成了接头性能与工艺参数之间的关系，并据此建立了优化工艺参数窗口，优化工艺参数下接头的抗拉强度可达到母材的80%以上。

The hollow-axis motor drives the offset nozzle and rotates the arc on the tip of wire at high speed,so as to ensure enough penetration into the sidewalls in narrow gap welding .

在该系统中，焊丝穿过电机的空心轴后从导电嘴的偏心孔送出，电机带动导电杆和偏心导电嘴旋转，从而使焊丝端部的电弧以一定直径高速旋转，以保证窄间隙焊接接头具有足够的侧壁熔深。

Aiming at the engineering problem that K welding machine is used to weld PD3 60kg/m rail during welding production at present, the quality of the joint falls short of the standard of TB/T1632-91 because of the objection of grey-spots in the welding joint, this paper analyses the element which influence the welding joint quality in detail from the stability of flash of the accelerating step of the rail, finds out the relationship between the stability of flash-butt welding and the quality of rail joint, provides the measure for controlling the quality of rail welding and some gist for establishing perfect controlling system of welding joint quality

针对目前焊轨生产中采用K型焊机焊接PD3 60kg/m钢轨，接头灰斑缺陷多，性能难以达到部颁标准要求的工程问题，对材质、焊接电压、焊接工艺对接头质量的影响进行研究，并从钢轨焊接加速烧化阶段的闪光稳定性入手，详细分析了影响接头质量的因素，找出了钢轨闪光焊稳定性与质量的关系，提出了控制钢轨焊接质量的措施，为建立完善的焊接质量控制体系提供了依据。

Surface shape in welding seam and microstructure and mechanical properties of joints were analyzed.

分析了焊缝表面成形及焊接接头组织、力学性能。

This proper technique helps to form good welding seam texture and improve mechanical properties of welding joint.

此工艺方法合理，获得了良好的焊缝组织和焊接接头力学性能。

Moveover, the relationship between mixity angle and the strain hardening exponent of welded seam was also studied.

进一步对熔合线上含裂纹焊接接头的复合角Φ与焊缝应变硬化指数的关系进行了研究。

Complex pressure vessels for applications of up to approximately 2,000 psia are typically cast of aluminum to utilize its high strength-to-weight ratio and to avoid weld joints.

复杂的压力容器的申请，最多的大约2000名psia通常铸造铝利用其高强度-重量比和，以避免焊接接头。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。