In the structural design of microdevices, SUS631 (17-7PH) microtubes fill the gaps in some bottlenecks in the field of device design. Due to the limitation of the drawing technology bottleneck of 631 microtubes, it has always been a technical problem that many designers cannot avoid. With the passage of time, 631 materials have now made a breakthrough in professional materials technology, making up for the shortcomings of microdevice materials. In the following, we will make some structural technical discussions in terms of material performance, characteristics and applications.

Performance of SUS631 (17-7PH) material: SUS631 material is compared with 17-7PH material, which has stable composition, strong corrosion resistance, good rust resistance, especially better deformation after solution treatment than 400 series materials. In addition, this material has been used in the medical field for a long time and has a good application base. It also meets biocompatibility requirements. After surface treatment, the material performs well in the boiling water rust resistance test, and the hardness after heat treatment can be achieved in the range of HV450-HV500.

Features of SUS631 (H17-7HP) Microtubes: SUS631 (H17-7HP) microtubes, SUS630 (H17-4HP) microtubes, inner hole roughness less than Ra0.6. Deformation after heat treatment, straightness 1 meter/0.05 linear bending, concentricity within 0.01MM, the minimum OD1MM in tube diameter, wall thickness T0.1MM technical realization. Of course, the realisation of specific non-standard structures requires off-line technical exchanges and the structural design goals of both parties.

SUS631 micro-tube micro-mechanical structure solution and application: 1. In terms of puncture structure, SUS631 has good hardness performance and corrosion resistance. It can effectively solve the problem of continuous consistency of the blade after continuous operation of the puncture blade. The strength and hardness of the puncture body are much better than SUS304 stainless steel. 2. Minimally invasive cutting, especially the cutting of tissue nodules and sclerosis. Whether it is unidirectional progressive rotation cutting, left and right rotation cutting or forward puncture cutting, the excellent performance of its material hardness and the durability and resistance of the cutting blade have good performance. 3. In terms of application extension of SUS631 micro tubes, we can do some needle knife-type blade cutting optimization, and we can also do some needle body strength structure optimization and other treatments. I believe there will be good performance.

The gradual realisation of diversified specifications of SUS631 (17-7) microtubes has met the design requirements to a certain extent. It also meets the requirements of strength after hardening and achieves the surgical goal of continuous and stable surgery. Of course, the material technology team has also achieved breakthroughs in various material drawing technologies in SUS630 (17-4HP) microtubes. The Sinowares team recommends that the appropriate materials and specifications can be selected according to the design requirements.