CAJ | 학술논문

采用脉冲激光实现304不锈钢与C-276合金异种材料的焊接成形，利用几何方法计算不同激光能量偏移量条件下C-276在焊缝中的熔化比例，借助电子探针对焊缝主要元素进行宏观分析，获得C-276熔化比例与焊缝Fe、Ni 两大元素在焊缝处的分布关系，并检测不同激光能量偏移条件下焊缝的力学性能。结果表明：304/C-276各异质焊缝化学元素分布均匀，且过渡区较窄，激光能量偏移量对异质焊缝元素含量影响较为显著，随着激光能量偏移量的增加，焊缝中Ni、Mo和W元素逐渐增多，Fe元素逐渐减少，Cr元素变化不大；C-276熔化比例与焊缝中Fe和Ni元素分布满足杠杆原理；304/C-276各异质焊缝的抗拉极限强度均低于304和C-276母材的，当激光能量偏向C-276母材+0.2~+0.3 mm时，焊缝抗拉极限强度达到最佳状态。
채용맥충격광실현304불수강여C-276합금이충재료적한접성형，이용궤하방법계산불동격광능량편이량조건하C-276재한봉중적용화비례，차조전자탐침대한봉주요원소진행굉관분석，획득C-276용화비례여한봉Fe、Ni 량대원소재한봉처적분포관계，병검측불동격광능량편이조건하한봉적역학성능。결과표명：304/C-276각이질한봉화학원소분포균균，차과도구교착，격광능량편이량대이질한봉원소함량영향교위현저，수착격광능량편이량적증가，한봉중Ni、Mo화W원소축점증다，Fe원소축점감소，Cr원소변화불대；C-276용화비례여한봉중Fe화Ni원소분포만족강간원리；304/C-276각이질한봉적항랍겁한강도균저우304화C-276모재적，당격광능량편향C-276모재+0.2~+0.3 mm시，한봉항랍겁한강도체도최가상태。
The technology of welding 304 stainless steel to C-276 alloy with Nd:YAG pulsed laser was carried out. The fusion ratio of C-276 in the weld joint was achieved with geometric method under the condition of different laser energy offsets. Macroscopic analysis of the main elements distribution in the weld joint was deeply studied by electron probe. The relationship between C-276 confuse ratio and compositions of Fe and Ni in the weld joint was achieved. Then, tensile test was carried out to detect the mechanical properties of the weld joint. The results indicate that, under the condition of different laser energy offsets, the main elements in dissimilar weld joint distribute uniformly. Laser energy offsets affect the elements composition significantly. With the increase of the laser energy offsets, Ni, Mo and W elements increase gradually, Fe element gradually reduces and Cr element changes little. The relationship between C-276 confuse ratio and compositions of Fe and Ni meets the leverage principle. Under the condition of different laser energy offsets, the ultimate tensile strength of weld joint is lower than those of 304 and C-276 base metal. As the laser energy moves to C-276 for about +0.2?+0.30 mm, the ultimate tensile strength of weld joint reaches the best.