Manufacturing method of bimetal composite pipe with uniformly deformed whole pipe body
A bimetal composite pipe, uniform deformation technology, applied in the field of composite material processing, can solve the problem that the wall thickness cannot obtain the bonding strength, etc., and achieves the effect of good bonding strength uniformity, large contact area, and improved bonding strength.
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Embodiment 1
[0034] In this embodiment, a bimetal composite pipe of Φ217.1mm×(10mm+2.5mm) is formed, and the length of the pipe is 11.1m. The base pipe is L360QS carbon steel pipe of Φ217.1mm×10mm. Φ195mm×2.5mm 409L alloy steel pipe, the length of the liner is 11.24m.
[0035] Detection of yield strength: first cut a short tube with a length of 200mm at the end of the pipe to be tested (base pipe or liner), and then cut four sets of tensile samples along the axial direction of the short tube, and the four sets of tensile samples are The circumference of the cross-section of the tube is evenly distributed, and finally the yield strength test of the tensile specimen is carried out according to the GBT-228 "Metallic Materials Tensile Test Method at Room Temperature" standard, and the average value of the yield strength of the four groups of tensile specimens is calculated, and the corresponding The yield strength of the base pipe and the yield strength of the liner are shown in Table 1.
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Embodiment 2
[0067] In this embodiment, a bimetal composite pipe of Φ219mm×(6mm+2mm) is formed, the pipe length is 5.3m, wherein the base pipe is L245NS carbon steel pipe of Φ219mm×6mm, the length of the base pipe is 5.3m, and the liner pipe is 316L stainless steel of Φ203mm×2mm The liner pipe is 5.5m long.
[0068] Adopt the method described in embodiment 1 to detect the yield strength σ of the liner si =301MPa; the strengthening modulus E' of the liner i =1650MPa; the yield strength σ of the base pipe so =330MPa; reinforcement modulus E' of base pipe o =1430MPa.
[0069] The concrete forming method of the present embodiment comprises the following steps:
[0070] Step 1, such as figure 1 As shown, the assembled base pipe 1 and liner 2 are clamped in the mold 3, and the length of both ends of the liner 2 protruding from the base pipe 1 is 100 mm;
[0071] Step 2. Calculate the theoretical forming pressure P of the first stage of hydraulic composite forming of bimetallic composite pi...
Embodiment 3
[0084] In this embodiment, a bimetal composite pipe of Φ219mm×(10mm+2mm) is formed, and the length of the pipe is 11.5m. The base pipe is a 415L stainless steel pipe of Φ219mm×10mm. Stainless steel pipe, liner pipe length is 11.8m.
[0085] Adopt the method described in embodiment 1 to detect the yield strength σ of the liner si =289MPa; the strengthening modulus E' of the lineri =1450MPa; the yield strength σ of the base pipe so =425MPa; reinforcement modulus E' of base pipe o =1922 MPa.
[0086] The concrete forming method of the present embodiment comprises the following steps:
[0087] Step 1, such as figure 1 As shown, the assembled base pipe 1 and liner 2 are clamped in the mold 3, and the length of both ends of the liner 2 protruding from the base pipe 1 is 150 mm;
[0088] Step 2. Calculate the theoretical forming pressure P of the first stage of hydraulic composite forming of bimetallic composite pipe according to the following formula i and the second stage the...
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