Improving the Polishing Effect of Stainless Tube by Magnetic Finishing with Gel Abrasive

2015 ◽  
Vol 656-657 ◽  
pp. 289-295
Author(s):  
A. Cheng Wang ◽  
Lung Tsai ◽  
Chun Ho Liu ◽  
Yan Cherng Lin
Keyword(s):  
Stainless Steel ◽  
Flow Property ◽  
Steel Tube ◽  
Stainless Steel Tube ◽  
Uniform Motion ◽  
Abrasive Particles ◽  
Sus304 Stainless Steel ◽  
Novel Approach ◽  
Abrasive Finishing ◽  
The Stability

Magnetic abrasive finishing (MAF) is a fast and high-precision polishing method. However, the magnetic force acting on abrasive particles will decrease remarkably when polishing stainless steel tubes with the property of non-permeability, such as the SUS304 stainless steel. Moreover, the abrasive particles will be moved off the surface of machining area due to the centrifugal force of rotation, resulting in reducing the stability of polishing process. Therefore, this study developed a novel approach by adopting different gels as the bonding materials to combine the magnetic abrasive particles with hard abrasive particles to create a series of magnetic abrasive gels. Generally, those abrasive gels have higher viscosity to dominate the flow property that will constrain uniform motion of the abrasive particles in MAF, and the abrasive gels can be tightly contacted to the wall surface to increase the stability of polishing. This investigation utilized the optimal parameters out of Taguchi method to polish SUS304 stainless steel tube for 30 minutes—the value of surface roughness can be reduced from 0.636μm Ra to 0.05μm Ra, which can be improved by 92.1%, and the amount of material remove rate is as high as 218.4mg.

Discussion on Roundness of Non-Ferromagnetic Tube by Interior Magnetic Abrasive Finishing Using a Magnetic Machining Jig

2021 ◽  
Vol 1018 ◽  
pp. 105-110
Author(s):  
Jiang Nan Liu ◽  
Yan Hua Zou
Keyword(s):  
Stainless Steel ◽  
Dynamic Equation ◽  
Steel Tube ◽  
Experimental Results ◽  
Stainless Steel Tube ◽  
Helical Motion ◽  
Magnetic Pole ◽  
Magnetic Abrasive Finishing ◽  
Sus304 Stainless Steel ◽  
Abrasive Finishing

In this study, mainly researching the improvement of roundness of thick SUS304 stainless steel tube by interior magnetic abrasive finishing using a magnetic machining jig. The influence of reciprocating velocity of magnetic pole unit on the improvement of roundness of interior surface was studied by establishing the dynamic equation of magnetic machining jig. Experimental results showed that low reciprocating velocity of magnetic pole unit is conducive to the improvement of interior roundness of the thick SUS304 stainless steel tube. The reason is that the low reciprocating velocity of magnetic pole unit reduces the pitch of the helical motion and can produce greater finishing force of the magnetic machining jig.

Transformations of hydrocarbon radicals moving along a stainless steel tube

2010 ◽  
Vol 4 (6) ◽  
pp. 928-934
Author(s):  
A. E. Gorodetskii ◽  
V. L. Bukhovets ◽  
R. Kh. Zalavutdinov ◽  
A. P. Zakharov
Keyword(s):  
Stainless Steel ◽  
Steel Tube ◽  
Stainless Steel Tube ◽  
Hydrocarbon Radicals

Production Process and Heat Transfer Performance of 10/316 Clad Tube

2014 ◽  
Vol 1081 ◽  
pp. 270-274
Author(s):  
Zui Xian Yu ◽  
Xue Sheng Wang ◽  
Qin Zhu Chen
Keyword(s):  
Heat Transfer ◽  
Stainless Steel ◽  
Heat Transfer Coefficient ◽  
Carbon Steel ◽  
Transfer Coefficient ◽  
Heat Transfer Performance ◽  
Steel Tube ◽  
Stainless Steel Tube ◽  
Transfer Performance ◽  
Clad Tube

A new preparation technique of carbon steel/stainless steel clad tube was introduced, and the contact surface was well combined. Meanwhile, with the using of tube heat exchanger, the experiment on the heat transfer performance of the clad tube was done. Comparing the 10/316 clad tube and the 316 stainless steel tube, the effects on the heat transfer performance of 316 stainless steel tube attached to carbon steel was evaluated. It is showed that overall heat transfer coefficient of 10/316 clad tubes is higher than that of stainless steel tube. The average heat transfer coefficient of 10/316 clad tubes is about 18.7%~34.4% higher than that of stainless steel tube. Experimental investigation indicates that, by brazing and cold drawing, the 10/316 clad tube was well combined and the thermal conductivity was better than that of stainless steel tube.

Leak tightness of magnetic pulse crimped joints

2012 ◽  
Vol 3 (3) ◽  
pp. 243-250
Author(s):  
A. Loosveld ◽  
W. De Waele ◽  
K. Faes ◽  
O. Zaitov
Keyword(s):  
Stainless Steel ◽  
Steel Tube ◽  
Test Series ◽  
Stainless Steel Tube ◽  
Magnetic Pulse ◽  
Test Procedures ◽  
Burst Test ◽  
Master Thesis ◽  
Leak Tightness ◽  
Sealing Materials

The goal of this master thesis is to realize and investigate leak tightness of joints produced by theelectromagnetic pulse (EMP) crimping process. This way of joining metals has gained more attention lately.With EMP welding, leak tight joints can already be achieved. However, the crimping process has somemajor advantages over EMP welding like the fact that more material combinations are possible and itrequires less energy. To realize the leak tightness, two kinds of sealing materials are used: O-rings andadhesives. The workpieces consist of an aluminium or stainless steel tube which is crimped on a solidaluminium mandrel with circumferential grooves in it. First, some preliminary tests are performed todetermine how much the tubes deform in the grooves. This deformation mainly depends on the appliedcharging voltage and the geometry of the groove. With this information, it is possible to estimate the amountof compression an O-ring would undergo when placed inside this groove. On other workpieces, adhesiveswill be applied. Several test procedures can be conducted on the parts to investigate leak tightness. Theresults of a helium test and a pressure burst test on the first test series conducted at the Walloon researchcentre CEWAC already showed that the use of O-rings can be effective.

Springback law of high-strength 21-6-9 stainless steel tube in numerical control bending under different process parameters

2015 ◽  
Vol 231 (10) ◽  
pp. 1783-1792 ◽  
Author(s):  
Jun Fang ◽  
Shiqiang Lu ◽  
Kelu Wang ◽  
Zhengjun Yao
Keyword(s):  
Stainless Steel ◽  
Friction Coefficient ◽  
Cross Section ◽  
Process Parameters ◽  
High Strength ◽  
Steel Tube ◽  
Numerical Control ◽  
Stainless Steel Tube ◽  
Outer Diameter ◽  
The Cross

In order to achieve the precision bending deformation, the effects of process parameters on springback behaviors should be clarified preliminarily. Taking the 21-6-9 high-strength stainless steel tube of 15.88 mm × 0.84 mm (outer diameter × wall thickness) as the objective, the multi-parameter sensitivity analysis and three-dimensional finite element numerical simulation are conducted to address the effects of process parameters on the springback behaviors in 21-6-9 high-strength stainless steel tube numerical control bending. The results show that (1) springback increases with the increasing of the clearance between tube and mandrel Cm, the friction coefficient between tube and mandrel fm, the friction coefficient between tube and bending die fb, or with the decreasing of the mandrel extension length e, while the springback first increases and then remains unchanged with the increasing of the clearance between tube and bending die Cb. (2) The sensitivity of springback radius to process parameters is larger than that of springback angle. And the sensitivity of springback to process parameters from high to low are e, Cb, Cm, fb and fm. (3) The variation rules of the cross section deformation after springback with different Cm, Cb, fm, fb and e are similar to that before springback. But under same process parameters, the relative difference of the most measurement section is more than 20% and some even more than 70% before and after springback, and a platform deforming characteristics of the cross section deformation is shown after springback.

scholarly journals Acoustic emission characteristics of stress corrosion cracks in a type 304 stainless steel tube

2015 ◽  
Vol 47 (4) ◽  
pp. 454-460 ◽  
Author(s):  
Woonggi Hwang ◽  
Seunggi Bae ◽  
Jaeseong Kim ◽  
Sungsik Kang ◽  
Nogwon Kwag ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Acoustic Emission ◽  
Stress Corrosion ◽  
Steel Tube ◽  
304 Stainless Steel ◽  
Stainless Steel Tube ◽  
Emission Characteristics ◽  
Type 304 ◽  
Type 304 Stainless Steel

Local cholinergic mechanisms mediate nitric oxide-dependent flow-induced vasorelaxation in vitro

1996 ◽  
Vol 270 (2) ◽  
pp. H442-H446 ◽  
Author(s):  
C. M. Martin ◽  
A. Beltran-Del-Rio ◽  
A. Albrecht ◽  
R. R. Lorenz ◽  
M. J. Joyner
Keyword(s):  
Nitric Oxide ◽  
Stainless Steel ◽  
Endothelial Cells ◽  
Steel Tube ◽  
Stainless Steel Tube ◽  
Physiological Salt Solution ◽  
Cholinergic Mechanisms ◽  
Basal Rate ◽  
Prostaglandin F

To determine whether local cholinergic mechanisms evoke nitric oxide (NO)-mediated flow-induced vasorelaxation, canine coronary artery rings without endothelium were suspended beneath an organ chamber that contained a stainless steel tube and a femoral artery segment with endothelium. The rings were superfused at a basal rate of 1 ml/min with physiological salt solution that was bubbled with 95% O2-5% CO2 and maintained at 37 degrees C. They were stretched to optimal length and contracted with prostaglandin F 2 alpha (2 x 10(-6) M). When flow through the stainless steel tube (direct superfusion) was increased from the basal rate of 1 to 4 ml/min, coronary force did not change. Superfusion of the rings (n = 8) with effluent from the femoral segment (endothelial superfusion) at 4 ml/min to study flow-induced vasodilation caused a 67.3 +/- 10.8% relaxation. Treatment of the segment with the NO synthase blocker NG-monomethyl-L-arginine (10(-4) M) eliminated the relaxation seen during endothelial superfusion (P < 0.05 vs. control). Application of atropine (10(-6) M) to additional femoral segments (n = 8) abolished the coronary relaxation observed during endothelial superfusion at 1 ml/ min, and the flow-induced relaxation observed at 4 ml/min was reduced from 64 +/- 8.3 to 27 +/- 5.6% (P < 0.05 vs. control). In studies on additional segments and rings (n = 6), the flow-induced relaxations at 4 ml/min of endothelial superfusion were blunted from 86 +/- 10 to 28 +/- 13% after the segments were treated with acetylcholinesterase (0.00028 U/min for 20 min). These data indicate that basal- and flow-induced release of NO from the vascular endothelium can be mediated by local cholinergic mechanisms. It is possible that flow causes acetylcholine release from certain endothelial cells, which stimulates NO release from these cells or from neighboring endothelial cells.

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