EHLA在中国取得巨大成功

激光技术 EHLA在中国取得巨大成功

20.07.2018Editor: Lina Klass

先在德国亚琛（Aachen）发明，继而在荷兰进行工业化验证，最终中国成为第一大应用市场：这个简单的公式就是EHLA成功案例的基础。“EHLA”是在弗劳恩霍夫激光技术研究所（Fraunhofer-Institut für Lasertechnik；简称“ILT”）开发的超高速激光熔覆技术。弗劳恩霍夫激光技术研究所旗下的ACunity GmbH（亚琛联合科技公司），最近向机械研究总院成果转化基地河北敬业增材制造科技有限公司交付了两台大型EHLA系统，用于大型液压系统部件维修。

使用EHLA，可以以极高的速度进行保护性金属涂层。
(Bild: Fraunhofer ILT, Aachen / Volker Lannert.)

ACunity GmbH 位于亚琛工业大学（RWTH Aachen）校园内的光生产中心（Cluster Photonik），2018年初在天津滨海成立ACunity中国公司亚琛联合科技(天津)有限责任公司，目标为国内客户提供激光材料加工生产相关的本地化服务。公司CEO洪臣先生解释道：“我们的目标是支持中国企业引进最先进的激光制造技术；中国对EHLA工艺的需求非常高，中国也在向绿色制造大步迈进，有意在未来两年内在欧洲模型上对硬镀铬进行法规限制。因此，我们与机械科学研究总院集团有限公司在2017年开始部署EHLA产业化格局，同年向其交付了全国首台采用经改良的EHLA喷嘴技术的多轴加工系统。通过这样的战略合作关系我们希望能够为客户提供全方位服务包括材料，工艺，设备，开发，服务，尽早使EHLA渗透到更多的行业。

EHLA：超高速激光熔覆

EHLA工艺的开发人员Thomas Schopphoven、Gerhard Maria Backes和Andres Gasser（从左到右）。
(Bild: Piotr Banczerowski / Fraunhofer.)

基于高端的系统装备，完善的工艺研发以及材料储备，ACunity希望能说服中国工业界采用EHLA工艺。其优势在于EHLA可实现镀层速度从每分钟0.5至2.0米增加至高达每分钟500米。此外，就EHLA而言，其本身需要相当少的材料，将可生产的单层厚度从先前的传统激光熔覆超过500微米减至25到250微米。

自机械研究总院集团率先引进设备后，河北敬业增材制造科技有限公司订购了两台EHLA大型设备，长度可达5米，最大直径1米，以及一台内壁激光熔覆系统。6月中，由 ACunity与其独家系统合作伙伴 Hornet Laser Cladding B.V. 共同开发的设备运抵中国。

继EHLA工艺在中国得到肯定之后，洪臣先生乐观地认为，很多相关行业将通过EHLA改变其生产模式，向着绿色制造迈进。接下来根据客户需求，ACunity会把重点主要集中在量身定制的专用机器上；基于模块化设计，便用于小型、中型甚至是超大型系统。

流程可靠性和质量成为重点

在这个全新的流程中取得成功不仅取决于系统技术，还取决于工艺技术和服务。“中国企业重视流程可靠的加工，我们根据客户的要求量身定制，”洪臣说：“我们使用EHLA工艺对多达上百个部件进行了涂层，以验证防腐蚀和防磨损的能力及质量。当然，这也包括开发和选择合适的金属粉末以及EHLA喷嘴的适应性。”此外，我们在中国还会为合作伙伴提供现场服务。为此，ACunity与机械研究总院集团公司建立了战略联盟，在天津滨海区我们建立的亚琛联合科技将成为集展示，加工，研发与一体的先进制造中心，为客户提供整套技术解决方案的咨询和培训。

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