Oil sleeve steel ball and manufacturing process thereof
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A technology for oil casing and steel grades, which is applied in manufacturing tools, metal processing equipment, metal rolling, etc., and can solve the problems of high cost, increased burden on billet management, and large market demand.
Active Publication Date: 2014-02-05
JIANGSU VALIN XIGANG SPECIAL STEEL
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[0002] Because of its large market demand and its specifications that are conducive to production, oil casings are favored by the majority of seamless steel pipe manufacturers. Domestically produced oil tubing and casings are mainly based on API SPEC 5CT "Casing and Oil Pipes" issued by the American Petroleum Institute. "Specification" is the standard. In the API 5CT 9th standard, all steel grades are H40, J55, K55, N80-1, N80-Q, R95, M65, L80-1, L80-9Cr, L80-13Cr, C90-1, For T95-1, C110, P110, Q125-1, for
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Embodiment 1
[0026] Example 1: Taking the production of 177.80mm*9.19mm casing as an example
[0027] The oil casing steel grade described in this embodiment is composed of the following components in terms of weight percentage: C: 0.28%, Si: 0.17%, Mn: 1.10%, P: 0.016 %, S: 0.008%, Cu: 0.06%, Ni: 0.10%, Cr: 0.11%, Mo: 0.002%, V: 0.005%, Al: 0.008%, other elements: 0.11%, and the balance is Fe.
[0028] For one of the oil and casing steel types mentioned above, the weight percentages of other elements are: As: 0.009%, Sn: 0.007%, Pb: 0.0008%, Sb: 0.0005%, Bi: 0.0008%, As+Sn+Pb+Sb+Bi: 0.0181%.
[0029] The composition of the 32Mn2 steel described in this example fully meets the composition requirements of J55, M65, N80Q, L80-1, R95, and P110 steel grades in the API 5CT 9th standard. These steel grades have a large strength range and need to meet better requirements. toughness.
[0030] The processing technology of oil casing steel is characterized in that it includes the following techno...
Embodiment 2
[0045] Example 2: Taking the production of 177.80mm*9.19mm casing as an example
[0046] The oil casing steel grade described in this embodiment is composed of the following components in terms of weight percentage: C: 0.36%, Si: 0.32%, Mn: 1.60%, P: 0.017 %, S: 0.014%, Cu: 0.10%, Ni: 0.06%, Cr: 0.13%, Mo: 0.007%, V: 0.005%, Al: 0.029%, other elements: 0.10%, and the balance is Fe.
[0047] For one of the oil and casing steel types mentioned above, the weight percentages of other elements are: As: 0.010%, Sn: 0.001%, Pb: 0.0008%, Sb: 0.001%, Bi: 0.0003%, As+Sn+Pb+Sb+Bi: 0.0131%.
[0048] The processing technology of an oil casing steel grade described in this embodiment is the same as that in Embodiment 1. The temperature of the heating section in the ring furnace heating described in the tube billet rolling process is 1300°C, and the temperature of the soaking section is 1270°C .
[0049] In the quenching and tempering process described in the heat treatment process, both ...
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Abstract
The invention discloses an oil sleeve steel ball. The oil sleeve steel ball consists of the following components by weight percent: 0.28-0.36% of C, 0.17-0.32% of Si, 1.10-1.60% of Mn, less than or equal to 0.02% of P, less than or equal to 0.2% of S, less than or equal to 0.2% of Cu, less than or equal to 0.2% of Ni, less than or equal to 0.25% of Cr, less than or equal to 0.1% of Mo, less than or equal to 0.08% of V, 0.008-0.03% of Al, less than or equal to 0.15% of other elements and the balance of Fe. The manufacturing process comprises the steps of converter smelting, external refining, continuous casting of a round billet, hot rolling of seamless pipes and heat treatment of an oil sleeve pipe. 0.008-0.030% of Al is specially added in the oil sleeve steel ball for refining grains, the toughness of steel pipes is improved, and the requirement that the steel for oil sleeves by API5CT is fine-grain killed steel. The steel ball is low in steel-making cost and easy in process control, and multi-steel-grade oil sleeves of J55, M65, N80Q, L80-1, R95 and P110 with wide intensity range can be produced by a proper process, so that the marks of steel for oil sleeves can be reduced, so that the oil sleeve steel ball is economical and practical, on one hand, the management of blanks and production are facilitated, on the other hand, stocks are reduced, and overstocked funds are lowered.
Description
technical field [0001] The invention belongs to the technical field of low-alloy steel, and in particular relates to an oil casing steel grade. Background technique [0002] Because of its large market demand and its specifications that are conducive to production, oil casings are favored by the majority of seamless steel pipe manufacturers. Domestically produced oil tubing and casings are mainly based on API SPEC 5CT "Casing and Oil Pipes" issued by the American Petroleum Institute. "Specification" is the standard. In the API 5CT 9th standard, all steel grades are H40, J55, K55, N80-1, N80-Q, R95, M65, L80-1, L80-9Cr, L80-13Cr, C90-1, For T95-1, C110, P110, Q125-1, for M65, N80Q, L80-1, R95, P110 steel grade oil casing pipe body, domestic manufacturers all use steel pipes of different materials to produce oil casing pipes of different steel grades, so On the one hand, it increases the burden on the management of billets, which is not good for the production organizatio...
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