焊接热输入

而M-A组元的形态，含量，分布，尺寸等受焊接热输入影响较大。

The morphology , content , distribution and size of martensite-austenite constituents were greatly influenced by heat input .

焊接热输入量大幅降低，可实现0.3mm以上薄板的无飞溅、高质量MIG/MAG熔焊和MIG钎焊。

This welding technology can greatly reduce the heat input to work piece and get spatter free , high quality weld .

随焊接热输入和激光功率密度的增大，金属蒸气和等离子体的热辐射以及熔池上部和熔池下部的流动传热作用增强，焊缝截面由钉形向近X形转变。

With increase of heat input and laser power density , the thermal effect of metal plasma and metal vapor as well as the fluid flow and the heat transfer in weld pool increase obviously , and the cross section of weld transforms from nail shape to near X shape .

由于电阻热的作用焊接热输入较小，焊缝成形更窄更高，可根据实际焊接的需要合理匹配IH和UP以得到理想的焊缝成形。

Because the resistance heat reduce the heat input , weld shape is narrow and over-reinforcement , so the desire weld shape can be got by adjust IH and Up according to the welding requirements .

建立了工件任意一移动点热源作用下温度场的瞬态模型，将MIG焊接热输入近似处理为沿3个坐标轴的三维串热源。

A transient model of temperature field is established which is heated by a random movable point heat source on the workpiece . In the paper , MIG welding input is approximately treated as 3-dimensional heat sources along three axes .

本文研究了4种不同的焊接热输入对400MPa超细晶粒耐候钢的焊接接头的基本性能的影响。

In this paper , the mechanical properties of welded joint of ultra-fine grained anti-weathering steel (σ 0.2400MPa ) produced by four different heat input were studied .

结果表明，CMT方法通过特殊的波形控制减小了电弧能量输入，同时较低的短路电流也降低了短路阶段产生的电阻热，因此可以更精确地控制焊接热输入。

It found the enery input of the welding arc could be reduced by the special wave control and the low short circuiting current also reduced the corresponding energy input during short circuit phase . The heat input to the workpiece can be controlled accurately .

传统短路过渡中增加干伸长是通过增加电阻的方式增加电阻热，而推拉丝短路过渡则是通过增加等效短路电流Ies的方式增加电阻热的作用，两者均可在一定程度上降低焊接热输入。

The traditional short-circuit transfer method increase the resistance heat by increasing the wire extension , But the push-pull short-circuit CO2 welding technics increase the resistance heat by increasing equivalent short-circuit current , they can both achieve reduce the welding heat input in a certain extent .

搅拌摩擦焊接热输入数值模型

Numerical model of heat input from rotational tool during friction stir welding

随着焊接热输入的增加，夹杂物平均尺寸增大。

The average size of inclusions is increased with the increasing of heat input .

本文定量测定了接头各组织的百分含量随焊接热输入的变化规律。

The content percent of the different microstructures with varied welding heat input was measured .

研究表明，减小搅拌头轴肩直径、降低焊接热输入有助于减小结构宏观变形；

Results showed that smaller tool shoulder and lower welding energy would reduce the deformation .

结果表明，低合金高强钢对焊接热输入敏感。

The result showed that low alloy high strength steel was sensitive to the welding heat input .

焊接热输入是影响活性激光焊熔深的重要参数；

It is found that the heat input has a large influence on the increment of the weld penetration .

去除未焊合缺陷后，接头抗拉强度随焊接热输入增大而降低。

After removing the kissing bond the tensile strengths of the joints increase when the heat input is increased .

当镀锌层较薄时，需要增大焊接热输入量，以提高液态铝在钢板表面的润湿。

More heat input is needed to promotes molten aluminium wetting the steel sheet when the zinc layer is thin .

当焊接热输入量小于35kJ/cm时，焊接接头性能良好。

When the welding quantity of heat exerted was less than 35kJ / cm , high quality of welded joint was available .

对不同焊接热输入下的6063铝合金焊接接头进行人工时效，分析其硬度分布和强度的变化。

Effects of artificial ageing on the hardness distributions and strength were analyzed for6063 aluminum alloy joints welded by varying heat inputs .

避免热裂纹的措施是采用高纯度的填充材料，以及低的焊接热输入量和层间温度。

Use filler metal with high purities and lowered welding input and low interpass temperature are conventional measure to avoid hot cracks .

结果发现焊接热输入能量的大小与分布模式对焊缝晶粒尺寸有重要影响，焊接热输入为48.0kJ/m表面聚焦模式时，焊缝组织较为均匀，晶粒尺寸为350μm。

The results indicate that the heat input energy and distribution pattern have an important effect on the size of the weld grain .

横向收缩变形随着焊接热输入的增加而增加，纵向收缩变形较常规焊接下的明显减小。

Transverse contraction distortion was added with the increase of heat input . Longitudinal distortion was reduced significantly compared with that without vibratory acceleration .

在薄壁箱形梁的分析中，将断续焊接热输入简化为分段瞬时体热源，按照实际焊接顺序加载计算，得到了焊接过程中各时刻的温度分布。

In the analysis of the thin-wall beam , the thermal input was simplified as transient section body heat sources and loaded as its actual sequence .

随着焊接热输入的增加，焊接热影响区的粗晶区和焊缝区中铁素体晶粒明显粗化，改变了焊接接头的强度和塑性。

The ferrite grains were coarsened in the coarse zone of HAZ and weld zone with heat input increasing . The strength and ductility of the welded-joint was changed .

随着焊接热输入量的增加，由于熔池搅拌、焊接应力、合金元素烧损等原因，马氏体的分布更加散乱和密集；

By increasing the weld heat input , the distribution of martensite becomes more dispersive and glomerate due to the molten pool stiring , the welding stress and the burning loss of alloy elements .

第一种方法针对焊接热输入对焊接温度场的重要影响作用，利用焊接热输入的计算公式，通过计算焊缝填充过程中输入的热量值来指导工艺参数的选取。

The first , due to the influence between welding temperature field and welding heat input , calculate the heat from welding line padding with the welding heat input formula , which can be used to direct the choice of process variables .

实践表明，当焊接热输入达到50kJ/cm以上时，低合金高强钢焊接接头由于在高温停留的时间增加，导致焊缝金属晶粒粗大，韧性降低。

Practice showed that , when welding heat input achieved 50kJ / cm above , HSLA welding joints stayed in the high temperature environment for more time , It would cause grains grow , notch toughness of the weld seam metal get lower .

焊接热输入增大不利于接头的纵向弯曲塑性，而接头的横向拉伸强度与母材基本相同，塑性可以接近母材的塑性，达到14%～17%。

The bending ductility of the joints would decrease with the heat input increasing . The tensile strength of the joints is equal to that of the base material and the tensile ductility could reach 14 % ~ 17 % , which is near to that of the base material .

铝合金搅拌摩擦焊时焊接速度与热输入的关系

Relation of welding speed and heat input at aluminum alloy friction stir welding

在焊接速度和热输入低于一定值时，不会发生咬边。

When the welding velocity and welding power are limited below a certain value , the undercut will not appear .

小孔型等离子弧焊熔透控制的关键是对小孔状态进行控制，而控制小孔状态的关键是控制焊接过程的热输入量。

The key of penetration control in Keyhole PAW is to control the state of the keyhole , and in order to control the state of the keyhole , it is important to control the heat input of welding process .