问题描述：
英语翻译
The tensile properties were higher in welds made under the Ar/CO2 mixture and with three passes per layer,in correlation to chemical composition and hardness results.
Impact properties were excellent in all the conditions studied .The best results were obtained under the Ar/CO2 mixture shielding ,up to –40’C .It was not possible to find a behavior pattern with the parameter variation used.
The tensile properties were higher in welds made under the Ar/CO2 mixture and with three passes per layer,in correlation to chemical composition and hardness results.
Impact properties were excellent in all the conditions studied .The best results were obtained under the Ar/CO2 mixture shielding ,up to –40’C .It was not possible to find a behavior pattern with the parameter variation used.
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