Hot rolled silicon steel sheet hot rolled silicon steel sheet is represented by Dr, which is divided into low silicon steel (silicon content & le; 8%) and high silicon steel (silicon content & amp; gt; 8
There are about 45 types of hot rolled (hot) stainless steel pipes with a diameter of 54-480mm and 36 types with a wall thickness of 5-45mm. There are 65 types of cold drawn (rolled) stainless steel pipes with a diameter of 6-200mm and 39 types with a wall thickness of 0.5-21mm.
.Design and research of high precision stainless steel pipe stainless steel pipe has many advantages, such as high strength, good corrosion resistance, strong impact resistance and so on, which makes it widely used in various fields of life. With the continuous improvement of automation, people have higher and higher requirements for the cutting quality of stainless steel pipe. At present, there are still many deficiencies in pipe cutting in China, which seriously restricts China's industrial development. Therefore, recently, the research on pipe cutting machine with high precision, high automation, high cutting quality and high cutting efficiency has become the research focus and difficulty of relevant disciplines, and it is also the inevitable trend of the further development of China's industry. Firstly, the intermittent cutting method of planetary bisymmetric eccentric installation can reduce the cutting deformation of stainless steel pipe and improve the cutting accuracy; Secondly, the tool of the intermittent stainless steel pipe cutting machine is eccentrically installed on the planetary gear to complete the rotation at the same time of revolution. Therefore, improves the use efficiency of the motor and reduces the manufacturing cost of the equipment; Then, the main components of the intermittent pipe cutter are analyzed by using SolidWorks 3D solid software and ANSYS finite element analysis software. ANSYS software verifies the rationality of the structure and improves the service life of the pipe cutter. At present, there are still many deficiencies in pipe cutting in China, which seriously restricts China's industrial development. Therefore recently, the research on pipe cutting machine with high precision, high automation, high cutting quality and high cutting efficiency has become the research focus and difficulty of relevant disciplines, and it is also the inevitable trend of the further development of China's industry. Firstly, the cutting characteristics of the intermittent stainless steel pipe cutter in the cutting process are analyzed, the overall cutting scheme of the intermittent stainless steel pipe cutter is determined, and the structure is designed. Then, the finite element analysis is carried out for the important parts of the intermittent stainless steel pipe cutter, The reliability of its strength and stiffness is verified. In the design process of intermittent stainless steel pipe cutting machine, the combination of theoretical analysis and computer simulation is used to verify the feasibility of the design, complete the tasks of scheme determination, theoretical analysis and structural design, and verify the rationality of the structure. This paper aims to design a pipe cutting machine with high automation, compact structure and high cutting precision, so as to improve the cutting quality of stainless steel pipe and bring more economic and social benefits to the enterprise. This paper comprehensively analyzes the research on stainless steel pipe cutting machines at home and abroad, draws lessons from the advanced structural design of relevant foreign pipe cutting machines, and makes a comparative analysis and Research on the characteristics of easy deformation and difficult cutting of stainless steel pipes. Taking the stainless steel pipe with diameter of 100mm ~ 150mm and wall thickness of 0mm ~ 5mm as the design object, and based on the structure of the existing planetary pipe cutting machine, A planetary double symmetrical eccentric installation intermittent cutting is proposed. The cutting can not only realize its own main motion and feed motion, but also reduce the deformation of stainless steel pipe in the cutting process. Professional L stainless steel pipe s stainless steel pipe and 904L stainless steel pipe have large quantity, excellent quality and low price fire resistance, water resistance, high temperature resistance strong and durable, safe and reliable, and improve the quality of cutting surface.
5 identification number and indication use international chemical element symbols and national symbols to indicate chemical composition. For a long time, stainless steel plate, stainless steel coil, stainless steel belt and stainless steel pipe have complete products, excellent quality and favorable price. Use letters to indicate composition content: for example, the United States, Japan, 300 series, 400 series 200 series; the serial number is composed of Latin letters and order, which only indicates the purpose.
.Standard provisions.
All decreased in varying degrees, with an average decrease of 7%. In terms of varieties, the prices of construction wire rod and rebar, which account for a large proportion of China's steel output, fell by 9% and 7% respectively, and the prices of medium and heavy plate and hot rolled coil fell by 7% and 7% respectively.
Batch size: a small number of single batch products will affect the unit price.
As long as it is a socket connected stainless steel wire, buttress must be set through calculation.
The back side is not protected by argon, and the flux coated welding wire (self protective flux cored welding wire) + TIG process is adopted. In the 1990s, the backing welding wire has been developed. Recently, China has also developed the stainless steel backing welding wire (i.e. flux coated welding wire, such as tgf30tgf308tgf30tgf347, etc.) It has been applied to the actual construction and achieved good results. We have successfully applied it in the capacity expansion and reconstruction project of Urumqi Petrochemical.
Stainless steel pipe appeared in Foshan, Guangdong Province in the tenth generation of the last century. With the rapid development of science and technology in recent decades, stainless steel pipe production is all over the country. Stainless steel pipe is more and more widely used. But in fact, most people, including many people in the industry, do not know much about the classification and application of stainless steel pipes. Take stainless steel pipe for example.
Packaging strategy.According to the production mode stainless steel pipe is mainly divided into seamless pipe and welded pipe. Seamless steel pipe can be divided into hot-rolled pipe, cold-rolled pipe, when calculating the approximate weight of stainless steel pipe and multiplying it by the unit price, the price of 6m stainless steel pipe can be roughly obtained, which can be used in the project budget.
Rheological and thermal changes in the quenching process of decorative stainless steel pipe the cooling characteristics of submerged quenching of stainless steel plate are numerically simulated by using the Euler multi fluid model in AVL fire software, and the numerical results are compared with the experimental results. In the research, the quenching medium is water. The mass, momentum and energy equations of gas-liquid two-phase of quenching medium and the quenching heat conduction equation of stainless steel workpiece are solved by numerical simulation. Based on the principle of equal heat flux between quenching medium and workpiece, the temperature field of quenching medium and workpiece is solved by coupling. The comparison between the numerical simulation and experimental results of decorative stainless steel pipe shows that the numerical simulation results of workpiece temperature are in good agreement with the experimental data. The model can reliably simulate the quenching process of workpiece, and can be extended to the multiphase flow simulation in complex system to guide the actual production. The single pass thermal simulation compression experiment of 13Cr super martensitic stainless steel was carried out by Gleeble thermal simulation tester to study the thermal deformation behavior at 950 ~ 1200 ℃ and strain rate of 0.1 ~ 5 s-1, and the microstructure evolution law of grains under different conditions was analyzed; Based on Sellars hyperbolic sinusoidal model, the flow stress constitutive equation of 13Cr super martensitic stainless steel was constructed. The results show that the peak stress decreases with the increase of deformation temperature and the decrease of strain rate; With the increase of deformation temperature the grain grows and coarsens gradually. With the increase of strain rate, the dynamic recrystallized grains are obviously refined. The thermal deformation activation energy Q = 519580.9 JMOL of decorative stainless steel pipe is calculated, and the expression of Zener Hollomon parameter is obtained. Different feedstocks were prepared by mixing cr17mn11mo3n nickel free austenitic stainless steel powder prepared by aerosol and wax based binder. The effects of binder ratio and powder loading on the rheological properties of feed were studied by rh5000 high pressure capillary rheometer. Non Newtonian index n, viscous flow activation energy E and comprehensive rheological factor alpha are calculated by second order model regression analysis; STV. The results show that the prepared feeds are pseudoplastic fluid. The binder system was composed of 65% microcrystalline wax (MW), 25% high density polyethylene (HDPE), 5% ethylene vinyl acetate copolymer (EVA) and 5% stearic acid (SA). The powder loading was 68 vol%. The feed had good comprehensive rheological properties. In order to study the cementitious properties of stainless steel AOD slag, stainless steel AOD slag was used to replace some cement, and its effects on the working properties and mechanical properties of cement mortar were studied. The results show that using stainless steel AOD slag to replace cement from 0 ~ 50%, with the increase of the content of stainless steel AOD slag, the water consumption of standard consistency of cement first decreases and then increases. When the content is 30%, the water reduction effect of stainless steel AOD slag is good; With the increase of the content of stainless steel AOD slag, the strength of cement mortar decreases in turn, indicating that the cementitious activity of stainless steel AOD slag is small.
Cold rolled non oriented silicon steel strip consists of nominal thickness (expanded by 100 times) + code a + iron loss guarantee value (the value after expanding the iron loss value when the frequency is 50Hz and the large magnetic flux density is 5T by 100 times). For example, thin strip, roll strip, calendering strip and other strips can be cut with a thickness of 0.03 to 0mm (Note: stainless steel calendering strips of various thickness and width can be produced according to the needs of customers)
440— High strength cutting tool steel, with slightly higher carbon content, can obtain higher yield strength after appropriate heat treatment, and the hardness can reach 58hrc. It belongs to hard stainless steel. A common application example is & ldquo; Shaving blade & rdquo;. There are three common models: 440C and 440f (easy to process).
The surface of stainless steel contains acid, alkali and salt substances (such as alkali water and lime water splashing on the decoration wall), which leads to local corrosion.