摘要
焊接等离子体释放的紫外光A(315~400nm)和紫外光B(280~315nm)是皮肤癌的重要诱因.基于净辐射系数的概念,考虑了连续谱(复合辐射和轫致辐射)和线谱等辐射机制,计算了氩等离子在常压、5000~25000K内的紫外光A,B的辐射属性.结果表明,随着等离子体半径Rp增加,全谱辐射发生强烈的自吸收效应,而紫外光A,B基本无自吸收;当Rp=1mm时,它们在总谱辐射(35~4500nm)的最大的占比分别为6.0%,1.9%,在非真空紫外辐射(200~4500nm)的最大的占比为36.3%和5%.为钨极氩弧的紫外光危害性研究提供了理论依据.
Exposure to ultraviolet A (315 ~ 400 nm) and B (280 ~ 315 nm) from welding arcs is an important risk factor for the development of skin cancer.Based on the concept of net emission coefficient,the radiative properties within the ultraviolet A and B ranges are calculated for argon plasma with a radius of Rp in the temperatures 5 000 ~ 25 000 K at atmospheric pressure.The various radiative mechanisms,including continuum (recombination and bremsstrahlung) and line radiation,are considered.It is concluded that although the self-absorption effect is prominent for the entire spectrum,it is very weak for the ultraviolet A and B.When Rp=1 mm,the ultraviolet A and B radiations account for at most of 6.0% and 1.9%,respectively.To the entire spectrum (35 ~ 4 500 nm) radiation,and account for at most of 36.5% and 5.0% to nonvacuum- ultraviolet (200 ~ 4 500 nm) radiation.This study establishes a theoretical basis for the study of the ultraviolet radiation posed by TIG arcs.
作者
王飞
李桓
Cressault Yann
Teulet Philippe
杨珂
WANG Fei;LI Huan;Cressault Yann;Teulet Philippe;YANG Ke(Tianjin Key Laboratory of Advanced Joining Technology,Tianjin University,Tianjin 300072,China;Laboratoire Plasma et Conversion d’Energie (LAPLACE),UPS,INPT,Université de Toulouse,Toulouse 31062,France)
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2019年第7期12-15,I0002,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金项目(51675375)
关键词
紫外光
辐射
焊接电弧
皮肤癌
净辐射系数
ultraviolet
radiation
welding arcs
skin cancer
net emission coefficient
