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Rolling method of 0Cr17 stainless steel disc strip

A stainless steel plate and rolling process technology, applied in the field of wire rod rolling, can solve the problems of poor plasticity, high scrap rate of pits, and high grinding cost, and achieves elimination of surface scarring defects, elimination of through-bar cracks, and economical benefits. Significant effect

Inactive Publication Date: 2017-05-10
XINGTAI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of steel has coarse grain structure, poor plasticity, and is sensitive to temperature. It is prone to cracks, scars, and scratches during the deformation process, resulting in high cracking and pitting on the surface of processed products.
At present, many manufacturers manually grind the scars and cracks on the surface of the wire rod. The cost of grinding is more than 150 yuan / ton, and the production efficiency is low and the cost of grinding is high.

Method used

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  • Rolling method of 0Cr17 stainless steel disc strip
  • Rolling method of 0Cr17 stainless steel disc strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The concrete process of the rolling method of this 0Cr17 stainless steel wire rod is as follows.

[0023] Smelting molten steel and continuously casting it into billets, its composition by weight percentage is: C 0.045%, Mn 0.53%, Si 0.39%, P 0.018%, S 0.002%, Cr 16.61%, Ni 0.10%, the rest is iron and unavoidable impurity elements.

[0024] The billet is heated in a heating furnace, the preheating temperature is 820°C, the heating temperature is 1020°C, the soaking temperature is 1020°C, and the time in the furnace is 125min. The lowest temperature in the rolling process is 768°C, the temperature difference between the surface and corner of the billet is 35°C, the finishing rolling temperature is 782°C, the spinning temperature is 785°C, and the rolling speed is 75 m / s.

[0025] The surface quality of the Φ5.5mm specification 0Cr17 wire rod obtained in this embodiment is as follows: figure 1 shown by figure 1 It can be seen that the surface quality is g...

Embodiment 2

[0026] Embodiment 2: The specific process of the rolling method of this 0Cr17 stainless steel wire rod is as follows.

[0027] Smelting molten steel and continuous casting into billets, its composition by weight percentage is: C 0.043%, Mn 0.50%, Si 0.36%, P 0.018%, S 0.002%, Cr 16.71%, Ni 0.07%, the rest is iron and unavoidable impurity elements.

[0028] The billet is heated in the heating furnace, the preheating temperature is 850°C, the heating temperature is 1020°C, the soaking temperature is 1030°C, and the time in the furnace is 130min; the minimum temperature in the rolling process is 760°C, and the temperature difference between the billet face and corner is 40°C, and the finish rolling is carried out. The temperature is 780°C, the spinning temperature is 789°C, and the final rolling speed is 75 m / s.

[0029] The obtained Φ5.5mm 0Cr17 wire rod in this embodiment has good surface quality, no scarring, and no visible cracks. Mechanical performance indicators: tensile ...

Embodiment 3

[0030] Embodiment 3: The specific process of the rolling method of this 0Cr17 stainless steel wire rod is as follows.

[0031] Melted steel is smelted and continuously cast into billets, its composition by weight percentage is: C 0.049%, Mn 0.50%, Si 0.39%, P 0.016%, S 0.002%, Cr 16.68%, Ni 0.07%, the rest is iron and unavoidable impurity elements.

[0032] Heat the billet in the heating furnace, the preheating temperature is 830°C, the heating temperature is 1012°C, the soaking temperature is 1020°C, and the time in the furnace is 120min; The temperature is 783°C, the spinning temperature is 790°C, and the final rolling speed is 70 m / s.

[0033] The surface quality of the Φ6.5mm specification 0Cr17 wire rod obtained in this embodiment is as follows: figure 2 shown by figure 2 It can be seen that the surface quality is good, no scarring, no visible cracks. Mechanical performance indicators: tensile strength 483Mpa, elongation 30%, reduction of area 78%, good performance....

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Abstract

The invention discloses a rolling method of a 0Cr17 stainless steel disc strip. The rolling method comprises a heating process, a rolling process and a wire drawing process. In the heating process, the steel blank preheating temperature is smaller than or equal to 850 DEG C, the heating temperature ranges from 1,000 DEG C to 1,020 DEG C, the soaking temperature ranges from 1,010 DEG C to 1,030 DEG C, and the heat preservation time ranges from 120 min to 150 min. According to the method, starting with the rolling process, by means of technological process control, 0Cr17 surface scab defects and cleaning rod cracks are eliminated, and the surface detection percent of pass of the disc rod reaches 95% or above. According to the method, the proportion of a high-temperature harmful phase is reduced through heating temperature control; by means of temperature control and low-temperature rolling in the rolling process and the wire drawing technology, the defects of rolling cracking, scabbing and scratching of the disc rod are overcome; and the first-detection percent of pass of the disc rod is 98% or above, the acid pickling second-detection percent of pass is 92% or above, and production of high-end 0Cr17 products is achieved.

Description

technical field [0001] The invention relates to a rolling method of wire rods, in particular to a rolling method of 0Cr17 stainless steel wire rods. Background technique [0002] Ferritic stainless steel is a stainless steel mainly composed of ferrite in use. 0Cr17 is a representative steel type of ferritic stainless steel, with a Cr content of 16% to 18%. It has a large thermal conductivity, a small expansion coefficient, and an It has the advantages of good performance and stress corrosion resistance; it is mostly used in the manufacture of parts resistant to atmospheric, water vapor, water and oxidative acid corrosion. However, this type of steel has coarse grain structure, poor plasticity, temperature sensitivity, and defects such as cracks, scars, and scratches that are prone to occur during the deformation process, resulting in a high rate of cracks and pits on the surface of processed products. At present, many manufacturers manually grind the scars and cracks on the...

Claims

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Application Information

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IPC IPC(8): B21B1/18B21B37/74C22C38/02C22C38/04C22C38/40
CPCB21B1/18B21B37/74C22C38/02C22C38/04C22C38/40
Inventor 安敬涛邸永田侯月华孔令波白李国郭键徐建平刘维王笑丹薛正国孙增淼王刚赵峻岭范玉聪马祥峰王子超
Owner XINGTAI IRON & STEEL