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Martensitic stainless steel cold-rolled steel strip for food-grade cutter and production method thereof

A martensitic stainless steel and cold-rolled steel strip technology, applied in the metallurgical field, can solve the problems of difficult daily maintenance, large investment in twenty-high rolling mills, unstable shape and crown control, etc., so as to solve the problem of poor cutting performance at the cutting edge , Eliminate carbide segregation defects, solve the effect of unstable shape and crown control

Pending Publication Date: 2021-03-19
山东泰山轧钢有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned method can produce stainless steel cold-rolled strips, it also has the following disadvantages: due to the large investment in the twenty-high rolling mill and the difficulty in daily maintenance, and the small diameter of the rolls of the twenty-high rolling mill, the incoming material is thicker and the plate is convex. Unstable hot-rolled coils will cause unstable shape and crown control after rolling

Method used

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Examples

Experimental program
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Embodiment

[0024] Dephosphorization of molten iron: the produced molten iron is dephosphorized at the molten iron station; after the molten iron arrives at the molten iron station, CaO powder, oxygen and CaF are added to the deep part of the molten iron 2 , Fe 2 o 3Particles, resulting in differences in oxygen positions in different regions, to achieve the purpose of dephosphorization. The slag basicity is controlled at 2-4 during dephosphorization.

[0025] Refining furnace smelting: dephosphorized molten iron is smelted in the refining furnace, and the primary reduction of silicon in the refining furnace is controlled at 0.35-0.55%; the alkalinity during the reduction period is controlled at 2.0-2.5, and the white slag is tapped; the tapping temperature is controlled at 1600-1640 °C.

[0026] Refining in LF refining furnace: After the molten steel reaches the LF refining furnace, blow argon and stir, add fluorite-lime-ferrosilicon powder in the order of slag adjustment, and the total...

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Abstract

The invention discloses a production method of a martensitic stainless steel cold-rolled steel strip for a food-grade cutter. The production method comprises the following steps: S1, dephosphorizing molten iron; S2, performing smelting in a refining furnace; S3, performing refining in an LF refining furnace; S4, performing continuous casting by a continuous casting machine; S5, annealing a plate blank; S6, grinding the plate blank; S7, performing heating by a heating furnace; S8, performing hot rolling; S9, performing annealing; S10, performing acid pickling; and S11, performing cold rolling.The production method has the advantages of favorable processability, smooth steel strip plate surface, flat plate shape and high dimensional precision.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a martensitic stainless steel cold-rolled strip for food-grade knives and a production method thereof. Background technique [0002] Compared with other steel types, martensitic stainless steel has good hardenability, and can be strengthened by heat treatment processes such as quenching and tempering to obtain higher hardness, strength and wear resistance. Compared with other stainless steels, martensitic stainless steel not only has higher strength, but also has better mechanical properties and high temperature oxidation resistance. Some organic acids with low concentration) show good corrosion resistance. In addition, martensitic stainless steel has good processing performance and is widely used in the production of scissors, western food knives, fruit knives, universal knives, kitchen knives and other knives, and has broad market prospects. [0003] It can be seen from th...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/40B21C37/04C21D8/02C22C33/04C21C7/064C21C7/076
CPCB21C37/04C21C7/064C21C7/076C21D8/0205C21D8/0226C21D8/0236C21D8/0247C21D2211/008C22C33/04C22C38/02C22C38/04C22C38/40Y02P10/20
Inventor 翟乃波燕照顺亓海燕刘文宪侯元新亓增艳赵丽明
Owner 山东泰山轧钢有限公司
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