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Preparing process of alloy steel forge piece

A preparation process and alloy steel technology, which is applied in the field of alloy steel casting, can solve the problems of energy consumption, resource consumption, cost consumption, etc., and achieve the effects of increasing strength, improving stress cracking resistance, and reducing energy consumption

Inactive Publication Date: 2020-08-07
浙江天基重工机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above existing technical solutions have the following defects: in the existing production process of alloy steel forgings, the formula of alloy steel forgings has been improved, but in the preparation process, oil cooling with strong hardenability is still required Quenching and tempering, but compared with water-cooling quenching, the oil-cooling quenching process still consumes more energy and resources, and the cost is higher

Method used

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  • Preparing process of alloy steel forge piece
  • Preparing process of alloy steel forge piece
  • Preparing process of alloy steel forge piece

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0060] A preparation process of an alloy steel forging disclosed by the invention comprises the following process steps:

[0061] S1: cast steel ingot; the steel ingot contains the following components by weight percentage:

[0062] element C Si mn P S Cr Mo Ni Nb V Fe content(%) 0.30 0.2 0.6 0.001 0.001 0.75 0.35 1.45 0.01 0.02 96.618

[0063] S2: Transfer the cast steel ingot to an annealing furnace adjusted to 600°C at 600°C, and raise the temperature to 700°C for a uniform temperature.

[0064] S3: Forging, specifically including the following steps:

[0065] Step a: Transfer the steel ingot after step S2 into a forging heating furnace, and heat it to 1200°C;

[0066] Step b: remove the heated steel ingot from the forging furnace, and then carry out preliminary forging on the steel ingot with a small amount of deformation, and at the same time, use high-pressure water jetting to remove the scale on the surface of the steel in...

Embodiment 1

[0089] The difference between Embodiments 10-13 and Embodiment 1 is that each parameter setting during the forging process in step S3 is listed in the table below.

[0090]

[0091] The difference between Embodiments 14-17 and Embodiment 1 is that the parameter settings during the normalizing process in step S4 are listed in the table below.

[0092]

[0093] The difference between Examples 18-21 and Example 1 is that the parameter settings in the hydrogen expansion process in step S5 are listed in the following table.

[0094]

[0095]

[0096] The difference between Examples 22-25 and Example 1 is that the parameters set in the austenitizing process in step S6 are listed in the table below.

[0097]

[0098] The difference between Embodiments 26-25 and Embodiment 1 is that the parameter settings in the staged quenching and tempering process in step S7 are listed in the table below.

[0099]

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PUM

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Abstract

The invention discloses a preparing process of an alloy steel forge piece. The process comprises the following process steps of S1, steel ingot pouring; S2, shifting and adjusting a steel ingot afterpouring is finished into a 600 DEG C annealing furnace at the temperature of 600 to 900 DEG C, and enabling the temperature to rise to 700 DEG C temperature equilibrium; S3, shifting the steel ingot into a forging heating furnace to be subjected to heating and forging; S4, carrying out normalizing treatment on the steel ingot after forging; S5, carrying out hydrogen diffusion treatment on the steel ingot after normalizing treatment; S6, carrying out heating austenitizing treatment on the steel ingot after hydrogen diffusion treatment; and S7, shifting the steel ingot after austenitizing treatment into a quenching pool to be subjected to graded quenching treatment, and carrying out tempering treatment on the steel ingot after graded quenching treatment. The alloy steel forge piece can be obtained through the above seven steps, and the preparing process has the advantages that the casting cost of the alloy steel forge piece can be reduced, and resources are saved.

Description

technical field [0001] The invention relates to the technical field of alloy steel casting, in particular to a preparation process of alloy steel forgings. Background technique [0002] At present, alloy steel forgings are important raw materials used in various industries to manufacture various parts and equipment, and the manufacturing process of alloy steel forgings with excellent mechanical properties is usually costly and puts great pressure on energy consumption and emission. [0003] The existing alloy steel preparation process, such as the Chinese invention with the publication number CN108048753A, discloses a low-alloy steel for rail vehicle brake discs and its heat treatment method. Its chemical composition is calculated by weight percentage: carbon: 0.15-0.30%, Silicon: 0.4-1.0%, Manganese: 0.4-1.0%, Chromium: 0.6-1.4%, Nickel: 0.4-1.2%, Molybdenum: 0.2-0.6%, Vanadium: 0.15-0.4%, Copper: 0.15-0.35%, Tungsten Niobium: 0.1-0.3%, niobium: 0.025-0.045%, zirconium: 0....

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D1/28C21D1/18C21D3/06C21D8/00C22C38/02C22C38/04C22C38/44C22C38/48C22C38/46
CPCC21D1/26C21D1/28C21D1/18C21D3/06C21D8/005C22C38/02C22C38/04C22C38/44C22C38/48C22C38/46
Inventor 阮红祥黄张培陈永军
Owner 浙江天基重工机械有限公司
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