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Austenitic stainless steel with excellent polishing performance and manufacturing method thereof

A technology of austenitic stainless steel and its manufacturing method, which is applied in the field of austenitic stainless steel, can solve the problems that the polishing performance of materials cannot be fundamentally improved, and achieve the effects of improving surface polishing performance and grinding performance

Inactive Publication Date: 2011-08-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method cannot fundamentally improve the polishing performance of the material in actual production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The steel with the composition shown in Example 1 in Table 1 is smelted in a vacuum furnace, and molded into a 40Kg steel ingot. After the steel ingot is billeted, it is heated to 1150°C. Rolled into a 3mm thick hot-rolled sheet; then coiled at a temperature of 700°C. The hot-rolled coils are annealed at 1020°C; the scale is removed by a continuous pickling process of phosphorus breaking-shot blasting-electrolysis-mixed acid pickling, in which the flow rate of shot blasting is controlled at 400kg / min; then cold rolling to 1mm, after cold rolling Perhydrogen bright annealing was carried out at a temperature of 950° C., and flattening was carried out after pickling, with an elongation rate of 0.5%. Finally, the polishing performance was measured according to the following method, and the polishing performance of this embodiment was measured to be B grade.

[0037] The evaluation procedure of the polishing performance is as follows. Take 3 to 5 samples from the cold-rolle...

Embodiment 2

[0039] Use electric furnace smelting and argon-oxygen decarburization furnace to refine the steel with the composition shown in Example 2 in Table 1, and continuously cast it into a slab, heat the slab to 1250°C, control the rough rolling temperature to 1200°C, and the finish rolling temperature to 1080°C , hot-rolled into a 5mm thick hot-rolled plate; then coiled at a temperature of 700 ° C. The hot-rolled coils are annealed at 1150°C; the scale is removed by a continuous pickling process of phosphorus breaking-shot blasting-electrolysis-mixed acid pickling, in which the shot blasting flow rate is controlled at 800kg / min; then cold-rolled to 2.5mm, cold-rolled Afterwards, it was annealed at a temperature of 1200°C, and after pickling, it was flattened and elongated, with an elongation rate of 0.5%. The polishing performance was measured according to the method described in Example 1, and the polishing performance of this embodiment was found to be B grade.

Embodiment 3

[0041] Use electric furnace smelting and argon-oxygen decarburization furnace to refine the steel with the composition shown in Example 3 in Table 1, and continuously cast it into a slab, heat the slab to 1220°C, control the rough rolling temperature to 1180°C, and the finish rolling temperature to 1010°C , hot-rolled into a 4mm thick hot-rolled plate; and then coiled at a temperature of 650°C. The above-mentioned hot-rolled coils are annealed at a temperature of 1120°C; the scale is removed by a continuous pickling process of phosphorus breaking-shot blasting-electrolysis-mixed acid pickling, wherein the shot blasting flow rate is controlled at 500kg / min; and then cold rolled to 1.5mm; After cold rolling, annealing and pickling were carried out at 1020° C., and then leveling and elongation were carried out. The elongation rate was 1%. Finally, the polishing performance was measured according to the method described in Example 1, and the polishing performance of this embodiment...

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PUM

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Abstract

The invention discloses an austenitic stainless steel with excellent polishing performance. The austenitic stainless steel comprises the following chemical components in percentage by weight: 16 to 20 percent of Cr, 7 to 15 percent of Ni, less than or equal to 2 percent of Mn, 0.2 to 2 percent of Cu, less than or equal to 0.05 percent of Al, less than or equal to 0.5 percent of Si, 0.03 to 0.1 percent of C, less than or equal to 0.05 percent of N, 0.01 to 0.06 percent of P, 0.003 to 0.05 percent of S, 0.05 to 0.5 percent of V, and the balance of iron and inevitable impurities. A manufacturing method for an austenitic stainless steel cold-rolled plate comprises the following steps of: heating a continuous cast plate blank to the temperature of between 1,100 and 1,300 DEG C; performing rough rolling at the temperature of between 1,000 and 1,250 DEG C; performing final rolling at the temperature of between 950 and 1,100 DEG C; performing quick cooling; coiling at the temperature of less than 700 DEG C; performing hot rolling to form a hot-rolled plate of the required specification; annealing the hot-rolled plate at the temperature of between 950 and 1,200 DEG C; removing oxide skin by adopting a continuous acid washing process of phosphorus breakage, shot blasting, electrolysis and mixed acid washing; performing cold rolling, wherein the overall reduction rate is more than 50 percent; and performing continuous annealing at the temperature of between 950 and 1,200 DEG C, or performing full-hydrogen bright annealing at the temperature of between 950 and 1,200 DEG C. The austenitic stainless steel cold-rolled plate has completely improved grinding performance and surface polishing performance, and is particularly suitable for the industries of building decoration, plastic dies, food sanitation, electronics and the like with strict polishing performance requirements.

Description

technical field [0001] The invention relates to austenitic stainless steel, in particular to austenitic stainless steel with excellent polishing performance, austenitic stainless steel cold-rolled strip with excellent polishing performance and a manufacturing method thereof. Background technique [0002] Austenitic stainless steel represented by SUS304 has excellent comprehensive properties such as corrosion resistance / heat resistance / machinability. This steel is widely used and has a high market share in stainless steel products. With the improvement of people's living standards, more and more industries such as construction / decoration / food hygiene / electronics use 304 austenitic stainless steel bright plates and mirror plates, and higher requirements are placed on the surface quality of materials. diversification. The steel generally used in the above fields is usually 2B or BA cold-rolled plate, or a mirror plate made by polishing on this basis, or a ground plate made by ...

Claims

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Application Information

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IPC IPC(8): C22C38/60C22C38/58C22C38/46B21B37/74C21D9/52C21D1/26C21D7/06
Inventor 骆素珍彭建国罗明王如萌
Owner BAOSHAN IRON & STEEL CO LTD
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