焊接规范对10Ni3CrMoV药芯焊丝熔敷金属化学成分及力学性能的影响

Influence of Welding Condition on Chemical Composition and Performance of Deposited Metal of 10Ni3CrMoV Flux-cored Wire

对焊接电流、焊接速度和道间温度等焊接规范参数的变化对10Ni3CrMoV药芯焊丝熔敷金属化学成分及力学性能的影响进行了研究与量化。结果表明,焊接电流增大时,具有脱氧同时兼具强化作用的合金元素烧损相对多一些,熔敷金属中的针状铁素体略显粗大;焊接速度变大时,熔敷金属中的先共析铁素体含量相对少一些;道间温度控制较高时,熔敷金属中的粒状贝氏体相对多一些。总体来说,当焊接电流在220-260 A、焊接速度在25-35 cm/min、道间温度在80-120℃范围内变化时,对10Ni3CrMoV药芯焊丝熔敷金属化学成分和力学性能的影响不大。

The influences of welding conditions such as welding current, welding speed and interpass temperature on the chemical composition and performance of the deposited metal of 10Ni3CrMoV flux-cored wire were studied. The results show that when the welding current increases, the loss of the alloying element with the reinforced and deoxidation effect is relatively more, the acicular ferrite in the deposited metal is slightly large; when the welding speed becomes large, the proeutectoid ferrite content in the deposited metal is relatively less; when the interpass temperature control is high, the granular bainite in the deposited metal is relatively more. When the welding current is 220-260 A,welding speed is 25-35 cm/min, interpass temperature is 80-120 ℃, the welding condition has less effects on the chemical composition and mechanical properties of 10Ni3CrMoV flux-cored wire.