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Hot-rolling production method for low-nickel austenitic stainless steel coils

A technology of austenitic stainless steel and production method, applied in the field of low-nickel austenitic stainless steel coil products, can solve the problems of narrow hot working range, surface cracks and edge cracks, large deformation rate, etc., and achieve the effect of reasonable formula

Inactive Publication Date: 2015-09-02
ZHENSHI GROUP EASTERN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Low-nickel austenitic stainless steel has relatively low nickel content, low cost, good mechanical properties and corrosion resistance, and can be widely used in home decoration, cabinets, water heaters and other industries, but the austenite structure in this low-nickel austenitic stainless steel It is in a metastable state, and the thermal processing interval is narrow. If the thermal processing parameters are not selected properly, edge cracks and surface cracks are likely to occur during the production process, which seriously affects the quality of its board surface and yield, and limits its wide application; The reduction and rolling speed also affect the surface and edge quality of stainless steel. Different rolling reductions and rolling speeds will affect the surface and edge quality of the stainless steel. If the deformation rate is too large, it is easy to Stress concentration occurs at the boundary of the slab, and surface cracks and edge cracks will occur in the subsequent rolling process. Also, if the deformation rate is too small, the temperature of the slab surface and edge will drop too much, and surface cracks and edge cracks will also occur.

Method used

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  • Hot-rolling production method for low-nickel austenitic stainless steel coils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The low-nickel austenitic stainless steel used in this example is composed by mass: C: ≤0.15%; Mn: 8-11%; P: ≤0.045%; S: ≤0.03%; Si: ≤1.0%; Cr: 13 ~17%; Ni: 1.0~2.0%; Mo: ≤0.8%; N: 0.1~0.20%; Cu: 0.5~1.5%; the balance is Fe.

[0030] The rolling process of the low-nickel austenitic stainless steel coil with a thickness of 4.6mm is: grinding→heating→phosphorus removal by high-pressure water→rough rolling→finish rolling→laminar cooling→coiling.

[0031] (1) Grind the 200mm thick continuous casting slab through 26 and 32 mesh grinding wheels respectively;

[0032] (2) After the continuous casting slab is ground, it goes through the preheating section, the first stage of heating, the second stage of heating and the soaking section before being released from the furnace. The temperature of the soaking section is 1240 ° C, the holding time of the soaking section is 60 minutes, and the total time in the furnace is 200 ~240min, the temperature of the upper surface of the conti...

Embodiment 2

[0038] The low-nickel austenitic stainless steel used in this example is composed by mass: C: ≤0.15%; Mn: 8-11%; P: ≤0.045%; S: ≤0.03%; Si: ≤1.0%; Cr: 13 ~17%; Ni: 1.0~2.0%; Mo: ≤0.8%; N: 0.1~0.20%; Cu: 0.5~1.5%; the balance is Fe.

[0039] The rolling process of the low-nickel austenitic stainless steel coil with a thickness of 9.0mm is: grinding→heating→phosphorus removal by high-pressure water→rough rolling→finish rolling→laminar cooling→coiling.

[0040] (1) Grind the 200mm thick continuous casting slab through 26 and 32 mesh grinding wheels respectively;

[0041] (2) After the continuous casting slab is ground, it goes through the preheating section, the first stage of heating, the second stage of heating and the soaking section, and then comes out of the furnace. ~240min, the temperature of the upper surface of the continuous casting slab is 15°C lower than that of the lower surface before being released from the furnace;

[0042] (3) During high-pressure water dephospho...

Embodiment 3

[0047] The low-nickel austenitic stainless steel used in this example is composed by mass: C: ≤0.15%; Mn: 8-11%; P: ≤0.045%; S: ≤0.03%; Si: ≤1.0%; Cr: 13 ~17%; Ni: 1.0~2.0%; Mo: ≤0.8%; N: 0.1~0.20%; Cu: 0.5~1.5%; the balance is Fe.

[0048] The rolling process of the low-nickel austenitic stainless steel coil with a thickness of 2.5mm is: grinding→heating→phosphorus removal by high-pressure water→rough rolling→finish rolling→laminar cooling→coiling.

[0049] (1) Grind the 200mm thick continuous casting slab through 26 and 32 mesh grinding wheels respectively;

[0050] (2) After the continuous casting slab is ground, it goes through the preheating section, the first stage of heating, the second stage of heating and the soaking section, and then comes out of the furnace. ~240min, the temperature of the upper surface of the continuous casting slab is 15°C lower than that of the lower surface before being released from the furnace;

[0051] (3) During high-pressure water dephosp...

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Abstract

The invention relates to a hot-rolling production method for low-nickel austenitic stainless steel coils, which is specially used for rolling low-nickel austenitic stainless steel coil products with the thicknesses of 2.5-16mm. The technological process comprises grinding, heating, high pressure water dephosphorization, rough rolling, finish rolling, laminar cooling and coiling. The steel coils are made of low-nickel austenitic stainless steel that comprises the following components in percentage by mass: less than or equal to 0.15 percent of C, 8-11 percent of Mn, less than or equal to 0.045 percent of P, less than or equal to 0.03 percent of S, less than or equal to 1.0 percent of Si, 13-17 percent of Cr, 1.0-2.0 percent of Ni, less than or equal to 0.8 percent of Mo, 0.1-0.20 percent of N, 0.5-1.5 percent of Cu and the balance of Fe. The hot-rolling production method can be used for producing low-nickel austenitic stainless steel coils without the defects of edge crack and surface crack, and the yield of the low-nickel austenitic stainless steel coils is increased.

Description

technical field [0001] The invention relates to a hot rolling production method of a low-nickel austenitic stainless steel coil, which is specially used for rolling a low-nickel austenitic stainless steel coil product with a thickness of 2.5-16mm. Background technique [0002] Low-nickel austenitic stainless steel has relatively low nickel content, low cost, good mechanical properties and corrosion resistance, and can be widely used in home decoration, cabinets, water heaters and other industries, but the austenite structure in this low-nickel austenitic stainless steel It is in a metastable state, and the thermal processing interval is narrow. If the thermal processing parameters are not selected properly, edge cracks and surface cracks are likely to occur during the production process, which seriously affects the quality of its board surface and yield, and limits its wide application; The reduction and rolling speed also affect the surface and edge quality of stainless ste...

Claims

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Application Information

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IPC IPC(8): C22C38/58C21D8/02
Inventor 颜海涛杨振申鹏李亚峰李杰杨志春刘晓亚
Owner ZHENSHI GROUP EASTERN SPECIAL STEEL
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