A combination of forging and rolling manufacturing method for 980 steel large-diameter cylinder for deep diving
A manufacturing method and large-diameter technology, which is applied in metal rolling, ship building, ship design, etc., can solve the problems of multiple firings, multiple reamings, etc., to expand the occurrence area, shorten the operation time, and shorten the supply cycle effect
Active Publication Date: 2020-05-22
ANYANG INST OF TECH
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is: to overcome the longitudinal weld problem in the deep submersible shell in the prior art produced by the roll-welded large-diameter cylinder and the multiple reaming of the forged-welded large-diameter cylinder In order to solve the problems and defects of the finished product with multiple fires, a method of combining forging and rolling of 980 steel large-diameter cylinders is provided to realize hot-processing manufacturing of 980 steel large-diameter cylinders for deep submersible shells
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Embodiment 1
[0045] The method for manufacturing a 980 steel large-diameter cylinder combined with forging and rolling for deep diving in this embodiment includes the following steps:
[0046] The first step, 980 steel smelting and ingot casting. The 980 steel ingot adopts the 24-edge ingot type with upper injection, the weight of the ingot is 137t, the length of the ingot is 2748mm, and the weight of the ingot is 100.46t.
[0047] The second step is the combined forming process of forging and rolling of 980 steel large-diameter cylinder. The specific process regulations formulated are as follows:
[0048] Table 1 Forging-rolling bonding process specification
[0049]
[0050] Table 2 Rolling process specification
[0051]
[0052] The first fire first heating specification, such as figure 2 As shown, it mainly includes the following steps:
[0053] 1) When the steel ingot is put into the furnace, the surface temperature of the steel ingot ranges from 550 to 400°C. Take one-th...
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Abstract
The invention discloses a 980 steel large-diameter cylinder forging and rolling combined manufacturing method for deep diving. The 980 steel large-diameter cylinder forging and rolling combined manufacturing method includes a forging and rolling combined forming process and a control cooling process specification. The forging and rolling combined forming process comprises the steps of oxygen-acetylene cutting, upsetting, punching, mandrel drawing-out, saddle forging and cylinder rolling by a rolling mill. The control cooling process specification mainly includes an online spray quenching process specification and a tempering process specification. The forming process of the method fully combines the advantages of free forging and continuous rolling, and solves the problem of longitudinal welds existing in an existing roll-welded cylinder and overcomes the limitation of the longitudinal welds to the overall size and performance of the cylinder, thereby fundamentally solving the problemscaused by the longitudinal welds to the manufacture of a shell and service safety; meanwhile, the defects of multiple times of hole reaming and finished products discharge by multiple heating of forge-welded large-diameter cylinder manufacture are overcome, and the operation time is greatly shortened; and the final control cooling process specification can reduce the number of times of reheatingthrough on-line spray quenching and tempering, a quenching and tempering heat treatment process is simplified, and the on-line performance control over the 980 steel large-diameter cylinder is realized.
Description
technical field [0001] The invention belongs to the technical field of manufacturing a large-diameter cylinder, and in particular relates to a method for manufacturing a 980 steel large-diameter cylinder combined with forging and rolling for deep diving. Background technique [0002] Military submarines are recognized as strategic weapons, and their research and development requires high and comprehensive industrial capabilities. At present, only a few countries can design and produce them by themselves. The bottleneck restricting the overall advancement of military submarines is the pressure hull of submarines. Regardless of the double-hull structure or the single-hull structure, a complete and qualified pressure-resistant shell is required; especially for the single-hull structure, the appearance of the submarine turtle is avoided, the noise level can be effectively reduced, and the concealment and threat are improved. However, the monocoque structure has higher requiremen...
Claims
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IPC IPC(8): B23P15/00B21B1/00B63B73/50
CPCB21B1/00B23P15/00B63B71/00
Inventor 贾斌马洪儒韩玉坤
Owner ANYANG INST OF TECH