因瓦合金钢4J36

因瓦合金钢4J36激光增材再制造工艺研讨
增材再制造技能是失效部件包含价值重新得到开发与运用的一种有效途径。根据4J36因瓦合金钢打开相关工艺实验,处理复合材料模具的失效问题。通过研讨激光功率、扫描速度以及送粉速率等修正参数,承认其对树枝晶生长方向的影响;选取激光修正的工艺参数:激光功率2 200 W,扫描速度550mm/min,送粉速率1.3r/min,搭接率40%,熔覆区组织细密、均匀,呈现良好的冶金结合,保证了各层间的结合强度及组织生长连续性。试件经力学功用检测,满意模具功用要求,可直接投入运用。
Research on Laser Additive Remanufacturing Process of Inva Alloy Steel 4J36 Additive Remanufacturing Technology is an effective way to re develop and utilize the value contained in failed components. Conduct relevant process tests based on 4J36 Invar alloy steel to solve the failure problem of composite material molds. By studying repair parameters such as laser power, scanning speed, and powder feeding rate, determine their influence on the direction of dendrite growth; Select the process parameters for laser repair: laser power 2200 W, scanning speed 550mm/min, powder feeding rate 1.3r/min, overlap rate 40%, dense and uniform microstructure in the fusion zone, presenting good metallurgical bonding, ensuring the bonding strength and tissue growth continuity between layers. The test piece has undergone mechanical performance testing and meets the requirements of mold performance, and can be directly put into use.

电渣重熔对4J36合金组织和力学功用的影响
通过对电渣重熔前后4J36合金(/%:0.17～0.18C,0.18～0.27Si,0.39～0.40Mn,0.009P,<0.000 5S,35.8～36.ONi)显微组织、夹杂物及化学成分和力学功用进行剖析检测,并研讨了电渣重熔对4J36合金组织和力学功用的影响。结果表明,通过电渣重熔后,4J36合金化学成分简直无变化,其晶粒尺度减小,一起其内部的夹杂物数量削减、尺度减小。屈服强度和抗拉强度均有必定前进,伸长率由原34%前进至58%,-196℃冲击功由原145 J前进至208 J。
The effect of electroslag remelting on the microstructure and mechanical properties of 4J36 alloy was studied by analyzing the microstructure, inclusions, chemical composition, and mechanical properties of 4J36 alloy (/%: 0.17-0.18C, 0.18-0.27Si, 0.39-0.40Mn, 0.009P,<0.0005S, 35.8-36.ONi) before and after electroslag remelting. The effect of electroslag remelting on the microstructure and mechanical properties of 4J36 alloy was also studied. The results showed that after electroslag remelting, the chemical composition of 4J36 alloy remained almost unchanged, its grain size decreased, and the number and size of inclusions inside decreased. Both yield strength and tensile strength have been improved to a certain extent, with elongation increased from 34% to 58%, and impact energy at -196 ℃ increased from 145 J to 208 J.

4J29/4J36铁基合金与TC4钛合金异种金属焊接组织及功用研讨
4J29 Kovar合金/4J36 Invar合金和TC4钛合金的复合构件具有轻质和经济适用性好等特色,一起可以集成功用长处,前进构件的运用功用,在机械工业、电子制造、化学化工、船舶工业以及航空航天等领域展现了不错的使用前景。但是,在复合构件的焊接中,简单在焊缝中产生脆性相以及剩余应力,所以复合构件在焊缝处简单产生脆性断裂。为了找到前进复合构件焊接质量的方法,首先打开了4J29 Kovar合金和TC4钛合金的真空分散焊,以Co箔作为中间夹层,然后打开了4J29 Kovar合金和TC4钛合金的真空电子束焊,以Cu箔和Nb箔的组合作为中间夹层,最终打开了4J36 Invar合金和TC4钛合金的真空电子束焊,以V箔和Fe箔的组合作为中间夹层。随后,剖析了焊接工艺参数以及夹层的植入对焊缝显微组织和焊接接头机械功用的影响,明晰了不同条件下焊接接头焊缝的构成机理。添加Co夹层对4J29 Kovar合金和TC4钛合金进行真空分散焊接,根究了焊接温度的挑选对焊缝微观组织以及焊接接头机械功用的影响。添加Co夹层后,焊缝中没有产生显着的缺点。钛合金与Co夹层之间的界面主要由Ti Co3
Research on the Structure and Properties of Welding of 4J29/4J36 Iron Base Alloy and TC4 Titanium Alloy Dissimilar Metals The composite components of 4J29 Kovar alloy/4J36 Invar alloy and TC4 titanium alloy are lightweight and have good economic applicability. At the same time, they can integrate performance advantages and improve the service performance of components, showing good application prospects in machinery industry, electronic manufacturing, chemical industry, shipbuilding industry, aerospace and other fields. However, in the welding of composite components, brittle phases and residual stresses are easily generated in the weld seam, so composite components are prone to brittle fracture at the weld seam. In order to find a method to improve the welding quality of composite components, vacuum diffusion welding of 4J29 Kovar alloy and TC4 titanium alloy was first carried out, with Co foil as the intermediate layer. Then, vacuum electron beam welding of 4J29 Kovar alloy and TC4 titanium alloy was carried out, with the combination of Cu foil and Nb foil as the intermediate layer. Finally, vacuum electron beam welding of 4J36 Invar alloy and TC4 titanium alloy was carried out, with the combination of V foil and Fe foil as the intermediate layer. Subsequently, the influence of welding process parameters and interlayer implantation on the microstructure and mechanical properties of welded joints was analyzed, and the formation mechanism of welded joints under different conditions was clarified. The addition of Co interlayer was used for vacuum diffusion welding of 4J29 Kovar alloy and TC4 titanium alloy, and the influence of welding temperature selection on the microstructure of the weld and the mechanical properties of the welded joint was investigated. After adding Co interlayer, no obvious defects were found in the weld seam. The interface between titanium alloy and Co interlayer is mainly composed of Ti Co3