Preparation method of arc-shaped forging piece with cylinder
A cylinder and forging technology is applied in the field of preparation of cylindrical arc forgings, which can solve the problems of difficult forming and low process stability of large cylindrical arc forgings, achieve good grain structure consistency, avoid Difficulty in forming and large machining allowance, the effect of reducing machining allowance
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[0067] Such as Figure 1-Figure 9 Shown, the preparation method of band cylindrical arc forging of the present invention, it comprises:
[0068] (1) forged slab: such as figure 2 As shown in (a), the size of the ingot 4 is determined according to the size of the arc-shaped forging. After upsetting and elongating, the core of the ingot is fully forged, and the remaining material at the head and tail of the ingot is removed, and the ingot 4 is cast through the upper and lower flat anvils 3 Forged into slabs. The longitudinal section of the slab is rectangular, assuming that the length of the slab is L (mm), the thickness is D (mm), and the section width is W (mm). D≤1:10, after passing the ultrasonic flaw detection test, the surface is ground to remove the scale.
[0069] (2) Hot-rolled billets: such as figure 2 As shown in (b), place the obtained slab in the heating furnace and raise it to the rolling temperature, determine the holding time t=(1.5D) / 100h (hour) according ...
Embodiment
[0079] In this embodiment, the forging is a 3-ton arc forging with a cylindrical body, and the radius of the outer arc of the forging is R 外 =2500mm, inner arc radius R 内 =1850mm, thickness D=80mm, the central angle of the forging is 125°, the diameter of the cylinder at the central angle of 45° is 225mm, and the material is 00Cr12Ni10MoTi steel.
[0080] (1) Forged slab: 4 tons of ingots were selected, and after being held at 1220°C for 10 hours, the billet was forged on a 3,500-ton free forging mill. After three times of upsetting and three drawing and elongation deformation, the dendrites were fully broken and the structure was uniform. Then remove the head and tail of the forging and further forge it into a slab with a size of 2900×700×185mm, and control the final forging temperature to 900°C. After forging, the ultrasonic flaw detection test is qualified, and the surface is ground to remove the scale.
[0081] (2) Hot-rolled steel slab: Place the slab in (1) in a contin...
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Abstract
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