基于热功率的焊接热输入分配及稀释率预测  

Welding heat input distribution and dilution ratio prediction based on thermal power

作　　者：马一鸣[1] 姜英龙 郭枭[1] 韩莹 谷宇[2] 王岩[2] Ma Yiming;Jiang Yinglong;Guo Xiao;Han Ying;Gu Yu;Wang Yan(Harbin Welding Institute Limited Company,Harbin 150028,China;State Key Laboratory for Advanced Stainless Steel Materials&Taiyuan Iron&Steel(Group)Co.,Ltd.,Taiyuan 030000,China)

机构地区：[1]中国机械总院集团哈尔滨焊接研究所有限公司,哈尔滨150028 [2]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,太原030000

出　　处：《焊接》2024年第6期54-59,67,共7页Welding & Joining

基　　金：高端镍基合金焊材关键工艺技术开发(20201102017)。

摘　　要：【目的】热输入Q_(HI)仅简单描述了焊接能量的来源与大小,没有阐明焊缝与母材吸收的热量如何分配的不足。【方法】该文利用基于填充金属量提出的热功率PPR概念,通过焊缝尺寸测量,JmatPro与公式计算等手段,实现了焊接热输入分配及稀释率进行的预测。【结果】基于P_(PR)可实现对熔化母材面积A_(mb)的预测,其曲线变化可分为渐增区、快增区、缓增区3个阶段。结合JmatPro计算的材料体积比热容与A_(mb)预测公式,可将不同PPR下的有效焊接热输入Q_(e)进行细分,发现在可焊区形成焊缝的热输入只占其31.77%~34.69%。【结论】提出了基于P_(PR)的焊缝面积百分比稀释率δ预测公式,并给出可焊区的焊接热功率为12.69~47.88 kW/cm^(2),稀释率为48.28%~85.03%。[Objective]The heat input Q_(UI)only briefly describes the source and magnitude of welding energy,without clarifying how the heat absorbed by the weld and base metal is distributed.[Methods]In this paper,the thermal power P_(PR)concept based on the amount of filled metal was used to realize prediction of welding heat input distribution and dilution ratio by means of weld size measurement,JmatPro and formula calculation.[Results]Based on PPR,the melting base metal area Amb could be predicted,and its curve change could be divided into three stages,gradual increase zone,rapid increase zone and slow increase zone.Combined with the specific heat capacity of material volume calculated by JmatPro and A_(mb)prediction formula,the effective welding heat input Q_(e)under different P_(PR)could be subdivided.It was found that the heat input of forming weld in the weldable zone only accounted for 31.77%to 34.69%.[Conclusion]The prediction formula of weld area percentage dilution ratioδbased on P_(PR)was proposed,and the welding thermal power of weldable zone was 12.69~47.88 kW/cm^(2),and the dilution ratio was 48.28%~85.03%.

关 键 词：热功率 焊缝尺寸 热输入 稀释率 

分 类 号：TG455[金属学及工艺—焊接]