Acidic corrosion resistant X60MS pipeline steel and preparation method thereof

A pipeline steel, acid resistance technology, applied in the field of iron and steel metallurgy, can solve the problem of pipeline steel weldability, HIC resistance performance, steel plate strength, yield ratio, elongation and other parameters fluctuated greatly, and the inclusion grain size is not provided. level, etc.

CN108411194AInactive Publication Date: 2018-08-17BAOTOU IRON & STEEL GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-08-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses acidic corrosion resistant X60MS pipeline steel. The acidic corrosion resistant X60MS pipeline steel comprises the following components of, by weight percent, 0.05-0.07% of C,0.10-0.20% of Si, 0.90-1.10% of Mn, less than or equal to 0.010% of P, less than or equal to 0.002% of S, 0.020-0.030% of Nb, 0.010-0.020% of Ti, 0.020-0.040% of Al and 0.20-0.30% of Cr. The inventionfurther discloses a preparation method of the acidic corrosion resistant X60MS pipeline steel. According to the acidic corrosion resistant X60MS pipeline steel and the preparation method thereof, theweldability, the HIC resistance and the drop hammer tearing resistance of the X60MS pipeline steel are improved; the production efficiency of the X60MS pipeline steel is improved substantially; energy consumption and the production cost are lowered; the service life is prolonged; the transportation safety of petroligenic natural gas is improved; and the requirements of socioeconomic development are met advantageously.
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Description

technical field

[0001] The invention relates to the technical field of iron and steel metallurgy, in particular to an acid corrosion-resistant X60MS pipeline steel and a preparation method thereof. Background technique

[0002] Oil and natural gas is an important strategy and reserve material of the national economy. With the rapid development of the national economy, the demand for energy such as oil and natural gas is increasing. The continuous growth of energy demand, structural adjustment and optimization have driven the oil and gas industry. comprehensive development. Pipeline transportation is an economical, safe and uninterrupted transportation method, which has the advantages of large transportation volume, low cost, high safety, convenience and high efficiency. In order to meet future oil and gas demand, H 2 Compared with the past, the development quantity of S oil and gas fields has increased greatly, and at the same time, the demand for pipeline steel for sour s...

Examples

Embodiment 1

[0078] Embodiment 1, preparation of acid corrosion resistant X60MS pipeline steel

[0079] Adopt KR method to desulfurize molten iron and high-quality steel scrap, LF refining and RH vacuum treatment to ensure the cleanliness of molten steel, LF refining uses a large amount of slag to make slag, RH vacuum treatment ensures the deep vacuum cycle time of molten steel, calcium treatment after vacuum treatment, Ar gas softening The blowing time is longer than 10 minutes, and the slab is continuously cast in the whole process of protection pouring, and the dynamic soft reduction technology is adopted to reduce the center segregation of the continuous casting slab to obtain the slab;

[0080] The slab is heated to a heating temperature of 1172°C, and the total time in the furnace is 185 minutes, and then the first-stage rolling is carried out, that is, the rolling in the austenite recrystallization zone, the starting rolling temperature is 1160°C, and the reduction ratio of the first...

Embodiment 2

[0081] Embodiment 2, preparation of acid corrosion resistant X60MS pipeline steel

[0082] Adopt KR method to desulfurize molten iron and high-quality steel scrap, LF refining and RH vacuum treatment to ensure the cleanliness of molten steel, LF refining uses a large amount of slag to make slag, RH vacuum treatment ensures the deep vacuum cycle time of molten steel, calcium treatment after vacuum treatment, Ar gas softening The blowing time is longer than 10 minutes, and the slab is continuously cast in the whole process of protection pouring, and the dynamic soft reduction technology is adopted to reduce the center segregation of the continuous casting slab to obtain the slab;

[0083] The slab is heated to a heating temperature of 1170°C, and the total time in the furnace is 190 minutes, and then the first-stage rolling is carried out, that is, the rolling in the austenite recrystallization zone, the starting rolling temperature is 1158°C, and the reduction ratio of the first...

Embodiment 3

[0084] Embodiment 3, preparation of acid corrosion resistant X60MS pipeline steel

[0085] Adopt KR method to desulfurize molten iron and high-quality steel scrap, LF refining and RH vacuum treatment to ensure the cleanliness of molten steel, LF refining uses a large amount of slag to make slag, RH vacuum treatment ensures the deep vacuum cycle time of molten steel, calcium treatment after vacuum treatment, Ar gas softening The blowing time is longer than 10 minutes, and the slab is continuously cast in the whole process of protection pouring, and the dynamic soft reduction technology is adopted to reduce the center segregation of the continuous casting slab to obtain the slab;

[0086] The slab is heated to a heating temperature of 1176°C, and the total time in the furnace is 188 minutes, and then the first stage of rolling is carried out, that is, the rolling in the austenite recrystallization zone, the starting rolling temperature is 1165°C, and the reduction ratio of the fi...