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一、前言108吨电动轮自卸车系湘谭电机厂为矿山生产的装卸运输工具,其使用环境恶劣。车架采用焊接结构,母材为 WEL—TEN80C 钢,焊丝为 SMH—70,采用混合气体保护焊焊接而成,焊后构件存在较高的残余应力,至使有的焊缝出现裂纹,为保持其强度,防止产生再热裂纹,焊后未经热处理,但残余应力的存在影响了车架的使用性能。为保证自卸车车架在使用
First, the preface 108 tons of electric wheel dump truck Xiang Tan Motor Factory for the production and handling of mining means of transport, its use of harsh environment. Frame welded structure, the base metal WEL-TEN80C steel, wire SMH-70, the use of mixed gas shielded welding is welded, there are high post-weld residual stress, so that some of the weld cracks, in order to maintain Its strength, to prevent reheat cracks, after welding without heat treatment, but the presence of residual stress affect the performance of the frame. To ensure the dump truck frame in use