Processing technology for super-strength corrosion-resistant steel product and rolling unit thereof

A technology of processing technology and rolling unit, which is applied in the direction of metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of steel plasticity and toughness decline, and it is difficult to save the overall performance of steel, so as to reduce the friction coefficient and solve the problem of Pitting corrosion defects, cost-effective effect

Active Publication Date: 2017-02-15
ZHEJIANG RUIZHI STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large amount of chromium used in the steel leads to a significant decrease in the plasticity and toughness of the steel, and it is difficult to save the overall performance of the steel only by refining the grain size.

Method used

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  • Processing technology for super-strength corrosion-resistant steel product and rolling unit thereof
  • Processing technology for super-strength corrosion-resistant steel product and rolling unit thereof
  • Processing technology for super-strength corrosion-resistant steel product and rolling unit thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: a kind of processing technology of steel: comprise the following steps:

[0054] The first step: take a steel billet 15, which includes the following components by weight percentage: 0.03% to 0.05% of carbon element, 0.035% to 0.05% of silicon element, 5% to 6% of manganese element, 0.25% to 0.35% of Phosphorus, 0.015% to 0.017% of sulfur, 9.50% to 10.5% of chromium, 0.35% to 0.5% of nickel, 0.20% to 0.35% of molybdenum, 0.15% to 0.16% of titanium, 0.04% ~0.05% vanadium element, 0.01~0.015% niobium element, 0.050%~0.060% tungsten element, 0.018%~0.020% cobalt element, 0~0.001% antimony element, and the rest is iron and unavoidable impurities.

[0055] The role of the main elements in steel is as follows:

[0056] Carbon: Carbon helps to improve the strength of steel, but it is not good for the toughness of steel. Controlling the carbon content at 0.03% to 0.05% can ensure sufficient strength, and at the same time make the steel have good toughness and wel...

Embodiment 2

[0077] Embodiment 2, a kind of rolling unit, see specification Figure 5 , including a longer roller table 2. A number of conveying rollers 7 are evenly arranged on the roller table 2, and a high-power motor is used as the main power part 5 to control the operation of the conveying rollers 7. Several auxiliary rollers 8 are arranged above the roller table 2 , and the same high-power motor is used as the auxiliary power part 6 to control the operation of the auxiliary rollers 8 . When the steel billet 15 is conveyed on the roller table 2, the conveying roller 7 and the auxiliary roller 8 are respectively located below and above the steel billet 15. On the one hand, they play a stabilizing role and prevent the steel billet 15 from derailing due to unstable feeding. On the other hand, the auxiliary roller 8 and the The interaction of the transfer rollers 7 makes the propelling force of the billet 15 stronger, preventing slippage during the rolling process.

[0078] A rolling mill...

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PUM

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Abstract

The invention relates to a processing technology for a super-strength corrosion-resistant steel product and a rolling unit thereof and aims to provide a production means of an improved steel product 00Cr9MoNi. The processing technology comprises the following steps of: Stp1, taking a steel billet which meets required components; Stp2, heating the steel billet in a heating furnace and controlling the heating temperature not to be less than solution temperature; Stp3, after discharging the steel billet, removing phosphorous at a high pressure, and performing first-stage rolling in an austenite recrystallization region, wherein the first-pass rolling reduction is not smaller than 65% of thickness of the steel billet, the average pass reduction is greater than 50% of thickness of the steel billet and a demand on total deformation is satisfied; and Stp4, performing second-stage rolling in the austenite recrystallization region, wherein the finish rolling temperature is controlled to be Ar3 above, and in the Stp2-Stp4, the rolling cooling speed is controlled at 15-30 DEG C / h. By virtue of the scheme, the steel product which is proper in cost and has super strength, toughness and corrosion resistance is obtained. The steel product processed by the technology is widely applied to the field of petroleum, sea, urban buildings and the like as a result of the protruding comprehensive property.

Description

technical field [0001] The invention relates to a steel product, in particular to an ultra-fine grain steel product. Background technique [0002] With the rapid development of domestic industrialization, the demand for high-performance steel in various industries has increased significantly. Especially in petroleum, marine operations, municipal construction, etc., the performance requirements for the strength, toughness, and corrosion resistance of steel are increasing day by day. In recent years, it has been known that reducing grain size in iron and steel materials is the best way to improve strength and toughness without adding alloy elements. However, in the current techniques for refining grains of austenitic steel materials, it is known that there is a problem that corrosion cracking occurs in a corrosive environment containing, for example, chloride ions. [0003] On February 11, 2015, a Chinese invention patent with publication number CN102753717B disclosed a fine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/02C22C38/60C22C38/44C22C38/50C22C38/46C22C38/48C22C38/52C21D8/06C21D6/00B21B37/74B21B1/02B21B27/02
CPCB21B1/026B21B27/02B21B37/74B21B2001/022C21D6/004C21D8/065C21D2211/001C22C38/002C22C38/02C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52C22C38/58C22C38/60
Inventor 李永安刘清友姜东高光亮何光辉张金中
Owner ZHEJIANG RUIZHI STEEL CO LTD
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