Laser repair welding of molds with various pulse shapes
Laser repair welding of molds with various pulse shapes
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发表时间：
2010
期刊：
影响因子：
0.6
通讯作者：
M. Pleterski;J. Tušek;L. Kosec;M. Muhič;T. Muhič
中科院分区：
文献类型：
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作者：
M. Pleterski;J. Tušek;L. Kosec;M. Muhič;T. Muhič
由于在重熔或熔覆过程中出现裂纹，用常规方法对冷作工具钢进行补焊非常困难，通常需要预热。作为替代，最近使用了利用激光技术的修复焊接。本文研究了脉冲Nd：YAG激光器中不同脉冲形状对此类工具焊接的影响。对AISI D2工具钢进行了补焊试验，淬火和回火至硬度为56 HRc，然后用扫描电子显微镜进行显微组织分析和缺陷调查。试验结果表明，选择正确的焊接参数和适当的脉冲波形，可以在不预热的情况下获得良好的焊缝。~elika za rad na hladno konvencionalnim metodama je vrlo te{ko zbog pukotina nastalih tokom pretaljivanja i navarivanja i op}enito vr{i se uz predgrijavanje.你可能会选择其他方法来修复激光技术。Ovaj rad predstavlja utjecaj razli~ ith oblika impulsa na zavarivanje alatnih ~elika s pulsnim laserom Nd：YAG. Reparaturno zavarivanje testirano je na alatnom ~eliku AISI D2，
Repair welding of cold-work tool steels with conventional methods is very difficult due to cracking during remelting or cladding and is generally performed with preheating. As an alternative, repair welding with laser technology has recently been used. This paper presents the influence of different pulse shapes on welding of such tools with the pulsed Nd:YAG laser. Repair welding tests were carried out on AISI D2 tool steel, quenched and tempered to hardness of 56 HRc, followed by microstructural analysis and investigation of defects with scanning electron microscopy. Test results suggest that it is possible to obtain sound welds without preheating, with the right selection of welding parameters and appropriate pulse shape. ~elika za rad na hladno konvencionalnim metodama je vrlo te{ko zbog pukotina nastalih tokom pretaljivanja i navarivanja i op}enito vr{i se uz predgrijavanje. U posljednje vrijeme se kao alternativna metoda koristi reparaturno zavarivanje upotrebom laserske tehnologije. Ovaj rad predstavlja utjecaj razli~itih oblika impulsa na zavarivanje alatnih ~elika s pulsnim laserom Nd:YAG. Reparaturno zavarivanje testirano je na alatnom ~eliku AISI D2,