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A kind of non-quenched and tempered steel and its preparation method

A technology for non-quenched and tempered steel and billet, applied in the field of non-quenched and tempered steel and its preparation, can solve the problems of inability to meet the design requirements of water jacket steel, reduce production efficiency, material waste, etc., so as to improve production and processing efficiency and prolong service life , The effect of reducing the weight of the blank

Active Publication Date: 2020-09-04
NEW FOUNDER HLDG DEV LLC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the steel for water jacket is mainly 22CrMo series quenched and tempered steel, which can achieve excellent mechanical properties after quenching and tempering heat treatment by adding elements such as Cr and Mo (Cr≥1.00%, Mo≥0.15%), usually Cr ≥1.00%, Mo≥0.15%; due to thermal stress and structural stress deformation during quenching and tempering, the outer wall of the workpiece blank must reach a certain thickness to resist heat treatment deformation, resulting in serious material waste and tool loss during subsequent machining. while reducing production efficiency
[0005] In addition, the widely used non-quenched and tempered steels are mainly medium-high carbon non-quenched and tempered steels, such as the 38MnVS series and 49MnVS series in GB / T 15712. These non-quenched and tempered steels have poor ductility and toughness and cannot meet the requirements of steel for water jackets Design requirements

Method used

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  • A kind of non-quenched and tempered steel and its preparation method
  • A kind of non-quenched and tempered steel and its preparation method
  • A kind of non-quenched and tempered steel and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The non-quenched and tempered steel of this embodiment contains the following components by weight percentage: carbon: 0.19%, silicon: 0.55%, manganese: 1.25%, chromium: 0.08%, aluminum: 0.010%, nickel: 0.01%, copper: 0.05% %, phosphorus: 0.012%, sulfur: 0.057%, vanadium: 0.07%, nitrogen: 0.0157%, lead: 0.002%, tin: 0.003%, arsenic: 0.003%, antimony: 0.004%, and the balance is iron.

[0048] The preparation method of the non-quenched and tempered steel of the present embodiment comprises the steps:

[0049] 1. EAF smelting

[0050] According to the above ingredients, the ingredients are sent to the electric furnace for smelting; during the smelting process, the proportion of molten iron entering the furnace is controlled to be ≥50%, and the proportion of scrap steel is ≤50%, so as to meet the requirements of copper, lead, tin, arsenic and antimony in the composition. content requirements; in addition, control electric furnace tapping P≤0.015%, prohibiting slag during t...

Embodiment 2

[0067] The non-quenched and tempered steel of this embodiment contains the following components by weight percentage: carbon: 0.20%, silicon: 0.55%, manganese: 1.26%, chromium: 0.10%, aluminum: 0.013%, nickel: 0.02%, copper: 0.06% %, phosphorus: 0.010%, sulfur: 0.055%, vanadium: 0.09%, nitrogen: 0.0163%, lead: 0.002%, tin: 0.005%, arsenic: 0.003%, antimony: 0.003%, and the balance is iron.

[0068] The preparation method of the non-quenched and tempered steel of the present embodiment comprises the steps:

[0069] 1. EAF smelting

[0070] According to the above ingredients, the ingredients are sent to the electric furnace for smelting; during the smelting process, the proportion of molten iron entering the furnace is controlled to be ≥50%, and the proportion of scrap steel is ≤50%, so as to meet the requirements of copper, lead, tin, arsenic and antimony in the composition. Content requirements; in addition, control electric furnace tapping P≤0.015%, prohibiting slag during t...

Embodiment 3

[0087] The non-quenched and tempered steel of this embodiment contains the following components by weight percentage: carbon: 0.20%, silicon: 0.56%, manganese: 1.25%, chromium: 0.09%, aluminum: 0.012%, nickel: 0.01%, copper: 0.05% %, phosphorus: 0.009%, sulfur: 0.053%, vanadium: 0.08%, nitrogen: 0.0149%, lead: 0.001%, tin: 0.004%, arsenic: 0.002%, antimony: 0.003%, and the balance is iron.

[0088] The preparation method of the non-quenched and tempered steel of the present embodiment comprises the steps:

[0089] 1. EAF smelting

[0090] According to the above ingredients, the ingredients are sent to the electric furnace for smelting; during the smelting process, the proportion of molten iron entering the furnace is controlled to be ≥50%, and the proportion of scrap steel is ≤50%, so as to meet the requirements of copper, lead, tin, arsenic and antimony in the composition. Content requirements; in addition, control electric furnace tapping P≤0.015%, prohibiting slag during t...

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Abstract

The invention provides non-quenched and tempered steel and a preparation method thereof. The non-quenched and tempered steel is prepared from the following compositions in percentage by weight: 0.15-0.22% of carbon, 0.15-0.80% of silicon, 1.20-1.60% of manganese, 0.05-0.30% of chromium, 0.010-0.030% of aluminum, 0.00-0.10% of nickel, 0.00-0.20% of copper, 0.000-0.025% of phosphorus, 0.020-0.060% of sulfur, 0.07-0.20% of vanadium, 0.010-0.020% of nitrogen, less than or equal to 0.01% of lead, less than or equal to 0.01% of tin, less than or equal to 0.01% of arsenic, less than or equal to 0.01%of antimony, and the balance of ferrum. According to the non-quenched and tempered steel, the strength is high, the plasticity and toughness are good, and the design requirements of steel for water jackets can be fully met.

Description

technical field [0001] The invention relates to a steel product, in particular to a non-quenched and tempered steel and a preparation method thereof. Background technique [0002] With the continuous improvement of environmental protection requirements in various countries, automobiles have gradually developed from fuel-driven to electric-driven. However, the electric vehicle technology is still immature, and there are problems such as short battery life, short life, and incomplete charging facilities, which have become a bottleneck restricting the development of new energy vehicles. Hybrid technology is currently the most effective solution. By adding a set of motor equipment to the original internal combustion engine of the car, the internal combustion engine supplies power to the battery, so that there is no need to use charging piles; at the same time, by optimizing the power system, low-speed Pure electric drive or hybrid drive of high-speed internal combustion engine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/58C22C38/06C22C38/42C22C38/46C22C38/60C21C7/10
Inventor 崔冕刘家善程勇周志伟刘栋林李占阳
Owner NEW FOUNDER HLDG DEV LLC
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