Production method for one-steel multi-grade pipeline steel blank

A production method and technology for steel billets, which are applied in the field of production of multi-stage pipeline steel billets for one steel, can solve the problems of large capital occupancy rate of enterprises, increased smelting cost of steel grades, and limited order quantity, etc., so as to facilitate production scheduling, The effect of improving order-taking ability and strength

CN110643884AInactive Publication Date: 2020-01-03NANJING IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-01-03
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a production method for a one-steel multi-grade pipeline steel blank, and relates to the technical field of steel smelting. Pipeline steel is mainly used for petroleum pipelineconveying and natural gas pipeline conveying, a pipeline product is designed through a low-carbon component system with a C content of less than 0.080% according to the use need stability and safetyof the product, and a component design with components which are applicable to many pipeline grades is carried out on the product according to the product yield requirement and the product performancerequirement, so that the smelting brands of the pipeline product are effectively reduced, production scheduling is benefited, and a blank stock is reduced; and through the design thought, the numberof pipeline steel types is effectively reduced, the steel types for pipelines are reduced to be more than 30 from the previous number of more than 50, and moreover, the replacement usability of the steel types is greatly improved, stocked blanks are effectively controlled, and the production operation rate of a steel plant is increased.
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Description

technical field

[0001] The invention relates to the technical field of iron and steel smelting, in particular to a method for producing a multi-stage pipeline steel billet for one steel. Background technique

[0002] During the plate manufacturing process of iron and steel enterprises, there is a big difference between the production volume and the order volume, and the production volume is produced according to the multiple of the heat weight. Therefore, the production process often produces surplus blanks. The remaining billets are not easy to be digested in the production process, and the backlog of billets often cannot be disposed of for several years, which takes up a large amount of capital for the enterprise and increases the cost of steel smelting. There are many and miscellaneous steel grades for pipelines, but they have certain versatility. The order quantity of individual grades is very limited. Once they are produced according to individual billet types, the rema...

Examples

Embodiment 1

[0042] A kind of production method of pipeline steel billet for multi-stage one-steel provided in this embodiment, comprising

[0043] S1. Adopt C<0.080% low-carbon component system design,

[0044] Internationally applied API SPEC 5L stipulates that BM composition is: C≤0.22%, Si≤0.45%, Mn≤1.20%, P≤0.025%, S≤0.015%, V≤0.05%, Nb≤0.05%, Ti≤ 0.04%, Ni≤0.30%, Cr≤0.30%, Mo≤0.15%, Cu≤0.50%, B≤0.001%, Pcm≤0.25%, every 0.01% decrease in carbon content, 0.05% increase in manganese content, and the maximum manganese content The value is 1.65%;

[0045] Internationally applied API SPEC 5L stipulates that the composition of X42M is: C≤0.22%, Si≤0.45%, Mn≤1.30%, P≤0.025%, S≤0.015%, V≤0.05%, Nb≤0.05%, Ti≤ 0.04%, Ni≤0.30%, Cr≤0.30%, Mo≤0.15%, Cu≤0.50%, B≤0.001%, Pcm≤0.25%, every 0.01% decrease in carbon content, 0.05% increase in manganese content, and the maximum manganese content The value is 1.65%;

[0046] Internationally applied API SPEC 5L stipulates that the composition of X46M i...

Embodiment 2

[0051] A kind of production method of pipeline steel billet for multi-stage one-steel provided in this embodiment, comprising

[0052] S1. Adopt C<0.080% low-carbon component system design,

[0053] Internationally applied API SPEC 5L stipulates that the composition of X52M is: C≤0.22%, Si≤0.45%, Mn≤1.40%, P≤0.025%, S≤0.015%, Nb+V+Ti≤0.15%, Ni≤0.30 %, Cr≤0.30%, Mo≤0.15%, Cu≤0.50%, B≤0.001%, Pcm≤0.25%, every 0.01% reduction in carbon content, the manganese content can be increased by 0.05%, and the maximum manganese content is 1.65%;

[0054] Internationally applied API SPEC 5L stipulates that the composition of X56M is: C≤0.22%, Si≤0.45%, Mn≤1.40%, P≤0.025%, S≤0.015%, Nb+V+Ti≤0.15%, Ni≤0.30 %, Cr ≤ 0.30%, Mo ≤ 0.15%, Cu ≤ 0.50%, B ≤ 0.001%, Pcm ≤ 0.25%, every time the carbon content decreases by 0.01%, the manganese content can be increased by 0.05%, and the maximum manganese content is 1.75%;

[0055] According to the internationally applied API SPEC 5L standard and product...

Embodiment 3

[0059] A kind of production method of pipeline steel billet for multi-stage one-steel provided in this embodiment, comprising

[0060] S1. Adopt C<0.080% low-carbon component system design,

[0061] Internationally applied API SPEC 5L stipulates that the composition of X65M is: C≤0.12%, Si≤0.45%, Mn≤1.60%, P≤0.025%, S≤0.015%, Nb+V+Ti≤0.15%, Ni≤0.30 %, Cr ≤ 0.30%, Mo ≤ 0.15%, Cu ≤ 0.50%, B ≤ 0.001%, Pcm ≤ 0.25%, every time the carbon content decreases by 0.01%, the manganese content can be increased by 0.05%, and the maximum manganese content is 1.75%;

[0062] Internationally applied API SPEC 5L stipulates that the composition of X70M is: C≤0.12%, Si≤0.45%, Mn≤1.70%, P≤0.025%, S≤0.015%, Nb+V+Ti≤0.15%, Ni≤0.30 %, Cr ≤ 0.30%, Mo ≤ 0.15%, Cu ≤ 0.50%, B ≤ 0.001%, Pcm ≤ 0.25%, every time the carbon content decreases by 0.01%, the manganese content can be increased by 0.05%, and the maximum manganese content is 2.00%;

[0063] According to the internationally applied API SPEC 5L s...