The harmful factors affect human health and preventive measures in welding process

The harmful substances produced in welding process have seriously endangered the health of welders and had a great impact on the environment. The harmful substances can be divided into physical hazards and chemical hazards. The physical hazards include welding arc, electromagnetic wave, thermal radiation and so on. The chemical hazards include welding fumes, harmful gases and so forth. The paper focuses on analyzing the harmful factors damage welders´ health and corresponding preventive measures.