Manufacturing method of seamless steel pipe for long pipe trailer gas cylinder with diameter of 920mm
A technology of seamless steel pipes and manufacturing methods, which is applied in the field of manufacturing large-diameter seamless steel pipes, can solve the problems of unguaranteed comprehensive mechanical properties, low material utilization rate, and high manufacturing costs, so as to improve manufacturing precision and product pass rate, The effect of reducing monomer weight, improving production efficiency and product qualification rate
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[0040] In order to facilitate the understanding of the present invention, examples of the present invention are listed below.
[0041] In this embodiment, a method for manufacturing seamless steel pipes for long-tube trailer gas cylinders with a diameter of 920 mm. The product specification is: seamless steel pipes of 920x22.8x12290mm. The material of the steel pipes is 4130X. The product size and weight requirements are shown below table:
[0042]
[0043] The mechanical performance requirements of the products are shown in the following table:
[0044]
[0045] The specific manufacturing process of the seamless steel pipe for the long tube trailer gas cylinder with a diameter of 920 mm is as follows:
[0046] Step a: The continuous casting slab with a diameter of 600mm is heated to 1250℃~1280℃ in a ring heating furnace, and the temperature of the continuous casting slab is 1250℃;
[0047] In terms of mass percentage, the chemical composition of continuous casting billet includes C: 0...
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