Heat-resistant steel for automobile fasteners and production method of heat-resistant steel

A production method and technology of heat-resistant steel, which are applied in the fields of material smelting and metal pressure extension processing, can solve the problems that the performance of ordinary steel wire materials cannot meet the requirements, and achieve the effects of delaying cold work hardening, high quality and improving the performance of cold piers.

Active Publication Date: 2020-08-18
SUZHOU DOUBLE GOLD IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention proposes a heat-resistant steel for automobile fasteners and its production method, which sol

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  • Heat-resistant steel for automobile fasteners and production method of heat-resistant steel

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Embodiment 1

[0027] Such as figure 1 As shown, the chemical composition wt% of the heat-resistant steel of the present invention includes: nickel Ni: 25.00, chromium Cr: 14.00, titanium Ti: 2.25, molybdenum Mo: 1.15, manganese Mn: 0.7, copper Cu: 0.4, aluminum AL: 0.25 , silicon Si: 0.4, lanthanum cerium rare earth La: 0.20, vanadium V: 0.15, carbon C: 0.040, boron B: 0.005, phosphorus P: ≤0.015, sulfur S: ≤0.005, nitrogen N: ≤300ppm, oxygen O: ≤ 20ppm, hydrogen H: ≤2ppm, the rest is iron Fe;

[0028] And the specific production steps of the heat-resistant steel of the present embodiment are as follows:

[0029] (1) Smelting: batching is carried out according to the above weight percentages, then smelted in a vacuum furnace, poured into steel ingots after smelting, and used in the next step;

[0030] (2) Refining: put the ingot into the electroslag remelting furnace for electroslag remelting, and then use RH cycle degassing equipment for vacuum degassing and removal of inclusions to ensu...

Embodiment 2

[0038] Such as figure 1 As shown, the chemical composition wt% of the heat-resistant steel of the present invention includes: nickel Ni: 25.00, chromium Cr: 14.00, titanium Ti: 2.30, molybdenum Mo: 1.25, manganese Mn: 0.8, copper Cu: 0.45, aluminum AL: 0.27 , silicon Si: 0.3, lanthanum cerium rare earth La: 0.20, vanadium V: 0.15, carbon C: 0.040, boron B: 0.005, phosphorus P: ≤0.015, sulfur S: ≤0.005, nitrogen N: ≤300ppm, oxygen O: ≤ 20ppm, hydrogen H: ≤2ppm, the rest is iron Fe;

[0039] And the specific production steps of the heat-resistant steel of the present embodiment are as follows:

[0040] (1) Smelting: batching is carried out according to the above weight percentages, then smelted in a vacuum furnace, poured into steel ingots after smelting, and used in the next step;

[0041] (2) Refining: put the ingot into the electroslag remelting furnace for electroslag remelting, and then use RH cycle degassing equipment for vacuum degassing and removal of inclusions to ens...

Embodiment 3

[0049] Such as figure 1As shown, the chemical composition wt% of the heat-resistant steel of the present invention includes: nickel Ni: 25.00, chromium Cr: 14.50, titanium Ti: 2.20, molybdenum Mo: 1.40, manganese Mn: 0.95, copper Cu: 0.35, aluminum AL: 0.30 , silicon Si: 0.25, lanthanum cerium rare earth La: 0.18, vanadium V: 0.20, carbon C: 0.040, boron B: 0.005, phosphorus P: ≤0.015, sulfur S: ≤0.005, nitrogen N: ≤300ppm, oxygen O: ≤ 20ppm, hydrogen H: ≤2ppm, the rest is iron Fe;

[0050] And the specific production steps of the heat-resistant steel of the present embodiment are as follows:

[0051] (1) Smelting: batching is carried out according to the above weight percentages, then smelted in a vacuum furnace, poured into steel ingots after smelting, and used in the next step;

[0052] (2) Refining: put the ingot into the electroslag remelting furnace for electroslag remelting, and then use RH cycle degassing equipment for vacuum degassing and removal of inclusions to en...

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Abstract

The invention discloses a heat-resistant steel for automobile fasteners and a production method of the heat-resistant steel. The heat-resistant steel is produced by adopting the production method of smelting, refining, hot-rolling, cold-drawing forming, box furnace heat treatment and inspection, packaging and storage. A trace amount of copper and lanthanum-cerium rare earth elements are speciallyadded into heat-resistant steel raw materials, cold hardening can be delayed, the purification of metal grain boundaries can be strengthened, the cold forging performance of the heat-resistant steel is improved, the heat-resistant steel can meet national requirements, the performance is good, the quality is high, producing of the automobile fasteners is facilitated, and the heat-resistant steel isbeneficial to prolonging the service life of the automobile fasteners.

Description

technical field [0001] The invention relates to a heat-resistant steel and a production method thereof, in particular to a heat-resistant steel for automobile fasteners and a production method thereof, and belongs to the technical field of material smelting and metal pressure extension processing. Background technique [0002] On December 2, 2019, the Ministry of Industry and Information Technology issued the "Guidance Catalog for the First Batch of Application of Key New Materials (2019 Edition)" in order to further improve the pilot work of insurance compensation for the first batch of application of key new materials. Come into force on 1st. It involves 40 advanced steel materials, one of the 40 advanced steel materials, and the specific requirements are as follows: [0003] Material name: ML06Cr15Ni25Ti2MoAlVB, ML04Cr11Nb heat-resistant steel for automotive fasteners; [0004] Performance requirements: [0005] The mechanical properties of steel wire delivery state: M...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/44C22C38/04C22C38/42C22C38/06C22C38/02C22C38/46C22C38/54C21D8/06
CPCC22C38/50C22C38/44C22C38/04C22C38/42C22C38/06C22C38/02C22C38/005C22C38/46C22C38/54C21D8/065
Inventor 时金明
Owner SUZHOU DOUBLE GOLD IND
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