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A 254smo super austenitic stainless steel hot rolling coil production process

A technology of austenitic stainless steel and production technology, which is applied in the manufacture of tools, metal rolling, metal rolling, etc., can solve the problems of low production efficiency, poor thermoplasticity, high energy consumption, etc., to reduce energy consumption and improve billet quality , the effect of saving mixed acid solution

Active Publication Date: 2022-06-21
山东盛阳金属科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with ordinary austenitic stainless steel, 254SMo has a narrow thermoplastic temperature range, poor thermoplasticity, and high deformation resistance. It is difficult to deform in actual production. 254SMo super austenitic stainless steel is rarely used in hot continuous rolling in actual production. line; the common processing form of 254SMo hot-rolled plate is single-stand reversing mill rolling (sheet rolling), which has high energy consumption, low production efficiency, and unstable batches with large differences

Method used

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  • A 254smo super austenitic stainless steel hot rolling coil production process
  • A 254smo super austenitic stainless steel hot rolling coil production process
  • A 254smo super austenitic stainless steel hot rolling coil production process

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A process for producing 254SMo super austenitic stainless steel hot continuous rolling coil, the chemical composition weight percentage of 254SMo stainless steel is: C=0.01%, Mn=0.55%, Ni=17.61%, Mo=6.26%, Si=0.33%, Cr =20.02%, N=0.205%, Cu=0.65%, P=0.02%, S=0.001%, the balance is Fe and inevitable impurities;

[0033] The process steps are as follows:

[0034] 1) Preheating: take the above-mentioned raw material slabs with a thickness of 220-240mm, put them into a heating furnace for preheating, adjust the preheating temperature to 740°C, and control the heating time to 70min;

[0035] 2) Heating: After preheating, conduct the first stage of heating, adjust the heating temperature to 1150°C, and control the heating time to 40min; after the first stage of heating, enter the second stage of heating, adjust the heating temperature to 1290°C, and control the heating time to 55min; the second stage of heating After the end, enter the soaking section, adjust the heating tem...

Embodiment 2

[0049] The difference compared with Example 1 is that a 254SMo super austenitic stainless steel hot continuous rolling coil production process, the chemical composition weight percentage of stainless steel is: C=0.016%, Ni=17.92%, Mo=6.41%, and the rest constant;

[0050] Step 1) Preheating: take the above-mentioned component raw material slab with a thickness of 220-240mm, put it into a heating furnace for preheating, adjust the preheating temperature to 720-750°C, and control the heating time to 72min;

[0051] Step 2) Heating: after the preheating is completed, perform a first stage of heating, adjust the heating temperature to 1140-1160°C, and control the heating time to 42min; after the first stage of heating, enter the second stage of heating, adjust the heating temperature to 1280-1300°C, and control the heating time at 55min; after the second stage of heating, enter the soaking section, adjust the heating temperature to 1290-1310℃, and control the heating time to 25min...

Embodiment 3

[0056] Compared with Example 1, what is not passed is that a 254SMo super austenitic stainless steel hot continuous rolling coil production process, the chemical composition weight percentage of stainless steel is: C=0.007%, Ni=17.52%, Mo=6.13%, the rest remain unchanged;

[0057] Step 1) Preheating: take the above-mentioned component raw material slabs with a thickness of 220-240mm, put them into a heating furnace for preheating, adjust the preheating temperature to 735°C, and control the heating time to 75min;

[0058] Step 2) Heating: after the preheating is completed, perform a first stage of heating, adjust the heating temperature to 1140°C, and control the heating time to 40min; after the first stage of heating, enter the second stage of heating, adjust the heating temperature to 1285°C, and control the heating time to 55min; After the end of the section, enter the soaking section, adjust the heating temperature to 1295 ° C, and control the heating time to 25 minutes; th...

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Abstract

The invention discloses a production process of 254SMo super austenitic stainless steel hot continuous rolling coils. The chemical composition weight percentage of 254SMo stainless steel is: C≤0.02%, Mn≤1%, 17.5%≤Ni≤18.5%, 6.0%≤Mo ≤6.5%, Si≤0.8%, 19.5%≤Cr≤20.5%, 0.18%≤N≤0.22%, 0.5%≤Cu≤1.0%, P≤0.03%, S≤0.01%, the balance is Fe and unavoidable Its process steps are as follows: 1) preheating: take the raw material slab of the above-mentioned components, the thickness is 220-240mm, put it into the heating furnace for preheating; 2) heating: enter the heating section after preheating is completed; 3 ) Rough rolling: After the steel billet is heated in the heating furnace, it is transferred to the transfer roller through the transfer device, and the phosphorus removal device behind the furnace is closed; 4) Finish rolling; 5) Coiling; 6) Uncoiling welding; 7) Annealing; 8 ) broken scale shot blasting; 9) pickling. The invention has the advantages of low energy consumption, high production efficiency, stable batches, high yield and high dimensional accuracy.

Description

technical field [0001] The invention belongs to the technical field of stainless steel production, in particular to a production process for a 254SMo super austenitic stainless steel hot continuous rolling coil. Background technique [0002] 254SMo super austenitic stainless steel has high strength, good toughness, excellent corrosion resistance and certain formability. The high chromium, nickel, molybdenum content and ultra-low carbon content in its chemical composition greatly improve the stability and corrosion resistance of the austenite structure. [0003] Compared with ordinary austenitic stainless steel, 254SMo has a narrow thermoplastic temperature range, poor thermoplasticity and large deformation resistance. It is difficult to deform in actual production. 254SMo super austenitic stainless steel is rarely used in hot continuous rolling in actual production. Line; the common processing form of 254SMo hot-rolled sheet is single-stand reversing mill rolling (slice rol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18C22C38/16C22C38/22C22C38/20C22C38/40C22C38/44C22C38/42C21D8/02C21D1/26B21B45/02B21B1/26C23G1/08C23G3/02B08B1/02
CPCC22C38/02C22C38/04C22C38/08C22C38/12C22C38/18C22C38/001C22C38/16C22C38/22C22C38/20C22C38/40C22C38/44C22C38/42C21D8/0226C21D8/0247C21D1/26B21B45/0287B21B1/26C23G1/086C23G3/028B08B1/005B08B1/02C21D2211/001
Inventor 周嘉晟冯旺爵
Owner 山东盛阳金属科技股份有限公司
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