Breaking News:

20G seamless steel cryogenic deformation and annealing studi

3 125

 20G seamless steel cryogenic deformation and annealing studies 12Cr1MoVG

20G and 12Cr1MoVG boilers with high-quality carbon steel, alloy steel representatives, in practice, has been widely used and developed. 12Cr1MoVG is the early development of successful application of the more mature and strong low-alloy steel pearlite heat, low carbon content, technology, thermal conductivity, and has a high creep rupture strength and ductility. Generally used in the manufacture of steam at temperatures below 540 ℃ collection box, steam pipes, metal wall temperature does not exceed 580 ℃ superheater, reheater and some casting and forging, high-parameter power plant is currently the most common main steam pipes, tubes of steel reheat. With the needs of the operating parameters and unit capacity of the power plant units as well as a sharp increase in temperature boiler to large diameter pipeline development, and promote the further study of high-temperature high-strength boiler tubes, and produce domestic hot-rolled (pull) the largest seamless steel pipe outside path specifications of 720mm, larger diameter seamless steel pipe thermal expansion path only through other processes to achieve. Relatively high production costs and production equipment is expensive in terms of hot-rolled seamless steel tubes used with the production process is simple, stable quality, economical and practical features of standard thermal expansion push technology, you can make pipe diameter increases in a short period of time, and low-cost, high production efficiency. Precisely because of this, as smelting, pushing standard hot-rolled steel pipe mainline expansion extends well to fill the domestic major steel production of non-standard and special types of large diameter seamless steel pipe blank lack solve the special needs of users .
Standard push a special thermomechanical treatment process is the essence of thermal expansion pipe. Through low-temperature deformation and annealing 12Cr1MoVG 20G seamless steel pipe and through the original heat-treated steel subsequent comparative analysis study microstructure, mechanical properties at room temperature, etc., and with reference to GB5310-2008 standards were evaluated.
Experiment with the chemical composition of the material to meet the requirements of GB5310-2008. Push standard cryogenic deformation annealing specification main parameters are: 20G (Flaring temperature 80 ~ 730 ℃, expanded diameter ratio 1.30, flaring speed 300mm / min, coil size 750mm, coil frequency 2500Hz and 910 ℃ normalizing heat treatment); 12Cr1MoVG (expansion tube temperature 750 ~ 800 ℃, expanded diameter ratio 1.27, flaring speed 170mm / min, coil size 750mm, coil frequency 2500Hz and 990 ℃ normalizing + 740 ℃ tempering).
The results showed that the use of low-temperature deformation annealing standard push production 20G, 12Cr1MoVG seamless thermal expansion pipe retained ferrite + pearlite structure of the original pipe, its grain size, non-metallic inclusions and room temperature mechanical properties are reached GB5310-2008 the request, from an economic cost, energy saving and low-carbon economy today advocated the practical requirements of view, 12Cr1MoVG subsequent heat treatment may be omitted. 20G seamless band structure produced after the original tube cryogenic deformation annealing, can be eliminated by subsequent normalizing heat treatment, and subsequent heat treatment tube has good overall performance, meet the requirements of GB5310-2008.

Related post


  1. Steel pipe weld welding
    Steel pipe weld welding 1342430586 -  Reply / Edit

    Steel pipe weld welding,Welding is a professional, highly normative work in the steel construction is very important, therefore, as a key in the bridge steel arch ribs processing monitor the entire process..

  1. Large-diameter seamless pipe
    Large-diameter seamless pipe 1332148241 -  Reply / Edit

    Large-diameter seamless pipe, ASTMSEAMLESS STEEL PIPE ,ERWSTEEL PIPE ,SEAMLESS STEEL PIPE ,SPIRAL WELDED STEEL PIPE .SPECIFICATION: 1/2" 3/4" 1"1 1/4" 11/2"2"2 1/2" 3"3 1/2"4"5"6"8"10"12"14"16"18"20".22"24"26".28".30"32"34" ..NOMINAL WALL TH.

  1. DIN seamless gas pipe
    DIN seamless gas pipe 1334107069 -  Reply / Edit

    DIN seamless gas pipe,Our company is a professional export business corporation.We export seamless steel pipe,carbon steel pipie staight steel pipe ,ERW steel pipe ,galvanized steel piipe and Large diameter steel pipe.we have high quality.

  1. DIN1629 St52 seamless pipe
    DIN1629 St52 seamless pipe 1333809273 -  Reply / Edit

    DIN1629 St52 seamless pipe,PRODUCTS: DIN1629 St52 seamless pipe, DIN1629 St52 seamless steel pipe, DIN1629 St52 seamless tube, DIN1629 St52 seamless steel tube.

  1. Laser slotted Screen pipe Technical parameters--processing performance purpose
    Laser slotted Screen pipe Technical parameters--pro 1519482072 -  Reply / Edit

    Processing performance [1] Cutting seam fine: laser cutting slit is generally in 0.10~0.20mm. Cutting thickness: Stainless steel 0.5-8mm, carbon steel 0.5-22mm [2] Smooth cutting surface: laser cutting surface without burrs, no need to deal.

  1. ASTM A213 gas pipe
    ASTM A213 gas pipe 1335581053 -  Reply / Edit

    ASTM A213 gas pipe 1.OD:2 3/8"-6 5/8" 2.Grade:E,X,G,S 3.Upset:IU,EU,IEU 4.HB:Arnco100XT,150XT,300XT, Botn1000,3000 5.IPC:TC.

Latest Comments

  • How long is the life of a spiral steel pipe ?
    How long is the life of a spiral steel pipe ?

    Spiral steel pipe itself has no life limit, and the service life is mainly related to the operating environment and production process. Spiral steel pipe operating environment is relatively poor In order to extend the service life, the oute.

  • Insulation Large Diameter Spiral Steel Pipe Structure and Features
    Insulation Large Diameter Spiral Steel Pipe Structure and Features

    Insulation Large Diameter Spiral Steel Pipe Structure and Features Insulation large diameter spiral steel pipe features: Polyurethane foam has good mechanical properties and thermal insulation properties. It can withstand 120C under normal.

Get in touch

Our company covers an area of 80, 000 m2 with a total assets of 90 million Yuan. There are 360 staff members including 80 technicians in our company. .

We also establish an effective complete quality control system. In 2003, our company obtained the certificate of ISO9001 Quality System Authentification!