Substrate for compressor shell and production method of substrate

A production method and compressor technology, applied in the iron and steel field, can solve problems such as lack of substrates for compressor shells, and achieve good market potential

Pending Publication Date: 2020-07-28
新余钢铁股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, there is no substrate for the compressor casing that can meet the above requirements at the same time.

Method used

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  • Substrate for compressor shell and production method of substrate
  • Substrate for compressor shell and production method of substrate
  • Substrate for compressor shell and production method of substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A substrate for a compressor housing, the chemical composition and weight percentage of which are shown in Table 1.

[0034] Table 1

[0035] C mn S P Si N als B 0.044 0.2118 0.0051 0.0144 0.0079 0.003 0.0367 0.0018 The balance is Fe and unavoidable impurities

[0036] The production method of the substrate for the compressor shell comprises the following steps:

[0037] (1) Desulfurization treatment of molten iron → converter smelting → argon blowing → LF → RH furnace refining to obtain molten steel with the composition described in Table 1, and then continuously cast slabs;

[0038] (2) Hot rolling process: heat the slab to 1200°C for rough rolling, the rough rolling adopts 3+3 mode, and RT1 rough rolling 3 passes, descaling in single and double passes; RT2 rough rolling 3 passes , using single and double pass descaling, RT2 temperature is controlled at 1025°C; final rolling temperature is 877°C, cooled to 643°C for coiling.

...

Embodiment 2

[0043] A substrate for a compressor shell, the chemical composition and weight percentage of which are shown in Table 2.

[0044] Table 2

[0045] C mn S P Si N als B 0.0401 0.1843 0.0056 0.0148 0.0072 0.002 0.0218 0.0016 The balance is Fe and unavoidable impurities

[0046] The production method of the substrate for the compressor shell comprises the following steps:

[0047] (1) hot metal desulfurization treatment → converter smelting → argon blowing → LF → RH furnace refining, obtain the molten steel of the composition described in Table 2, and then continuously cast slabs;

[0048] (2) Hot rolling process: heat the slab to 1204°C for rough rolling, the rough rolling adopts 3+3 mode, and RT1 rough rolling 3 passes, descaling in single and double passes; RT2 rough rolling 3 passes , using single and double pass descaling, RT2 temperature is controlled at 1035°C; final rolling temperature is 880°C, cooled to 641°C for coiling.

[0049]...

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Abstract

The invention discloses a substrate for a compressor shell and a production method of the substrate. The chemical composition and weight percentage of the substrate comprises the following: 0.03-0.06%of C, 0.15- 0.3% of Mn, no greater than 0.005% of N, no greater than 0.02% of P, no greater than 0.010% of S, no greater than 0.03% of Si, 0.02-0.06% of Als, 0.0015-0.0025% of B, no greater than 0.01% of S and the balance iron and the inevitable impurities, wherein B-N*11/14=0, and the substrate is prepared by steelmaking, hot rolling, leveling and pickling processes. According to the substrate,through reasonable composition design, steelmaking process route, roughing double-pass descaling, hot rolling low-temperature finishing rolling and low-temperature curling, after suitable pickling process and leveling process treatment, the substrate for the compressor shell and with high welding performance and punching performance is obtained, the yield strength of the substrate is 220-300 MPa,the tensile strength is greater than or equal to 300 MPa, and the elongation A80 is greater than or equal to 45%; and by means of the method, the substrate for the compressor shell and with high welding performance, molding performance and formed surface quality can be obtained, and high market potential is achieved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel, and in particular relates to a substrate for a compressor shell and a production method thereof. Background technique [0002] The compressor shell is usually divided into upper bottom shell and lower bottom shell, which are directly stamped and formed by hot-rolled plate after pickling. The substrate for compressor shell requires good forming performance, good welding performance and good surface quality after stamping. There should be no iron oxide scale on the surface of the substrate, otherwise it will easily affect its welding performance after stamping. The substrate must have a certain elongation, otherwise stamping cracks will easily occur, and the substrate structure must be uniform to avoid fine lines of varying degrees on the surface after stamping. [0003] However, in the prior art, there is no substrate for a compressor housing that can satisfy the above requirements at the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C33/04C21D8/02
CPCC22C38/04C22C38/02C22C38/06C22C38/002C22C33/04C21D8/0205
Inventor 钟海清唐小勇李世桓刘涛杨同利邱香花叶茂彭冲杨源华喻建林吴洪刘志芳杨帆
Owner 新余钢铁股份有限公司
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