we manufacture according to Chinese Standard GB/T20878-2007. Duplex Stainless Steel Pipes Duplex Stainless Steel Pipes,Super Duplex Stainless Steel Pipe,Duplex Stainless Steel Seamless Pipe,Duplex Welded Stainless Steel Pipe Torich International Co.,Ltd--The Steel Tube Maker , http://www.chinasteeltubepipe.com
The grade 2205 is equivalent to Chinese Grade 022Cr23Ni5Mo3N.
The grade availability is as below:
UNS S32304(23Cr-4Ni-0.1N)
UNS S31803(SAF2205)00Cr22Ni5Mo3N
UNS S31500(3RE60)(22Cr-5Ni-3Mo-0.15N)
UNSS32550(25Cr-6Ni-3Mo-2Cu-0.2N)
UNS S32750(SAF2507)(25Cr-7Ni-3.7Mo-0.3N)
Tool speed range study
There is a clear difference in the mechanism between high-speed cutting and low-speed cutting. When the cutting speed of the cutting tool exceeds 5 m/s, the maximum cutting force and the corresponding cutting resistance begin to decrease. From this trend, it can be inferred. : When the cutting tool mills less thick soil at a cutting speed greater than 10 m/s, the maximum cutting force of the Roots reciprocating pump unit will be smaller. At the same time, the corresponding dynamic cutting specific resistance will tend to be consistent, and will not change due to the difference in chip thickness.
When the cutting speed is greater than 7 m/s and the soil is milled at a cutting distance of less than 60 mm, the dynamic cutting resistance increases with the rotation Angle H, that is, the cutting thickness C, and exhibits a linear increasing trend over the entire speed segment. The mechanism of this operation is that when the drum rotates at a high speed, the cutter is cut from the bottom of the soil to the surface of the soil, and the cutting process is developed from a region surrounded by soil to another relatively free region. When the cutting distance is small, the tool is milled along the cutting path to the maximum thickness of the soil debris, that is, the soil above the section is close to the soil section ADD' Roots water jet unit F, and the soil is quickly removed without its top soil constraint. It is too tearful to make an impact on the tool. Therefore, when the tool is cut at high speed, the maximum cutting resistance generated will be significantly improved, and the degree of dispersion of the cutting specific resistance will gradually become uniform and become a constant.
The maximum cutting force and its corresponding cutting resistance are maximized in the working speed range of about 5 m/s. This speed range is just between low speed cutting and high speed cutting. It is also the maximum cutting force and The corresponding turning point of the maximum cutting specific resistance. The mechanism of action is: when the working device is working in this speed range, the tool starts to cut from the thinnest part of the bottom of the chip, and when cutting to a certain thickness, the soil has an impact on the tool, and the impact cutting continues. The maximum chip thickness is reached, resulting in a sharp increase in the maximum cutting force and its corresponding cutting specific resistance. When the cutting speed exceeds this speed range, the mechanism of action is gradually converted to the case of high-speed cutting or low-speed cutting, so that the maximum cutting force generated and its corresponding cutting specific resistance are also reduced.