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Production method of steel 42CrMo4+HH used for fuel gas electric generator connecting rods

A technology of gas generator and production method, which is applied in the field of iron and steel smelting, can solve the problems of high production cost and long production cycle, achieve the effects of reducing internal stress, saving production cost, and eliminating the annealing process of casting electrodes

Inactive Publication Date: 2015-10-14
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of steel ingots produced by the existing electroslag remelting process is better than that of continuous casting slabs and die casting ingots, but at the same time it has the disadvantages of long production cycle and high production cost

Method used

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  • Production method of steel 42CrMo4+HH used for fuel gas electric generator connecting rods
  • Production method of steel 42CrMo4+HH used for fuel gas electric generator connecting rods
  • Production method of steel 42CrMo4+HH used for fuel gas electric generator connecting rods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A production method of steel 42CrMo4+HH for connecting rods of gas-fired generators, sequentially undergoes EBT electric arc furnace smelting, LF refining, VD vacuum treatment, pouring electrodes, electrode insulation, electroslag remelting, electroslag ingot annealing and thermal processing, wherein EBT electric arc furnace smelting, according to weight percentage, control chemical composition C: 0.38, Si: ≤0.40, Mn: 0.60, P: ≤0.020, S: ≤0.015, Cr: 0.90, Mo: 0.15, Ni: ≤0.30, Cu: ≤0.20, Alt: ≤0.015, the balance is Fe.

[0016] The preparation process is specifically:

[0017] Electric arc furnace smelting:

[0018] The molten steel is smelted in an EBT electric arc furnace with a nominal volume of 50t. The raw materials are high-quality scrap steel and molten iron produced by Benxi Iron and Steel (the ratio of scrap steel and molten iron is added to the EBT electric arc furnace for smelting), and the conventional smelting process is adopted. Eccentric bottom tapping t...

Embodiment 2

[0030] A production method of steel 42CrMo4+HH for connecting rods of gas-fired generators, sequentially undergoes EBT electric arc furnace smelting, LF refining, VD vacuum treatment, pouring electrodes, electrode insulation, electroslag remelting, electroslag ingot annealing and thermal processing, wherein EBT electric arc furnace smelting, according to weight percentage, control chemical composition C: 0.38~0.45, Si: ≤0.40, Mn: 0.60~0.90, P: ≤0.020, S: ≤0.015, Cr: 0.90~1.20, Mo: 0.15~0.30 , Ni: ≤0.30, Cu: ≤0.20, Alt: ≤0.015, and the balance is Fe.

[0031] The preparation process is specifically:

[0032] Electric arc furnace smelting:

[0033] The molten steel is smelted in an EBT electric arc furnace with a nominal volume of 50t. The raw materials are high-quality scrap steel and molten iron produced by Benxi Iron and Steel (the ratio of scrap steel and molten iron is added to the EBT electric arc furnace for smelting), and the conventional smelting process is adopted. E...

Embodiment 3

[0045]A production method of steel 42CrMo4+HH for connecting rods of gas-fired generators, sequentially undergoes EBT electric arc furnace smelting, LF refining, VD vacuum treatment, pouring electrodes, electrode insulation, electroslag remelting, electroslag ingot annealing and thermal processing, wherein EBT electric arc furnace smelting, according to weight percentage, control chemical composition C: 0.45, Si: ≤0.40, Mn: 0.90, P: ≤0.020, S: ≤0.015, Cr: 1.20, Mo: 0.30, Ni: ≤0.30, Cu: ≤0.20, Alt: ≤0.015, the balance is Fe.

[0046] The preparation process is specifically:

[0047] Electric arc furnace smelting:

[0048] The molten steel is smelted in an EBT electric arc furnace with a nominal volume of 50t. The raw materials are high-quality scrap steel and molten iron produced by Benxi Iron and Steel (the ratio of scrap steel and molten iron is added to the EBT electric arc furnace for smelting), and the conventional smelting process is adopted. Eccentric bottom tapping to...

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Abstract

The invention belongs to the field of steel smelting, and specifically discloses a production method of steel 42CrMo4+HH used for fuel gas electric generator connecting rods. The production method comprises steps of EBT electric arc furnace smelting, LF refining, VD vacuum treatment, electrode casting, electrode thermal insulation, electroslag remelting, electroslag ingot annealing, and hot working; wherein according to the step of EBT electric arc furnace smelting, the steel 42CrMo4+HH is prepared from following chemical ingredients, by weight percentage, 0.38 to 0.45 part of C, Si<=0.40, 0.60 to 0.90 part of Mn, P<=0.020, S<=0.015, 0.90 to 1.20 part of Cr, 0.15 to 0.30 part of Mo, Ni<=0.30, Cu<=0.20, Alt<=0.015, and the balance Fe. According to the production method, a step of casting electrode annealing is avoided, production period is shortened, and production cost is reduced.

Description

technical field [0001] The invention relates to the iron and steel smelting field, specifically a production method of steel 42CrMo4+HH for gas generator connecting rods. Background technique [0002] Gas generator is a new type of energy generator that uses combustible gases such as natural gas and liquefied petroleum gas as combustion materials instead of gasoline and diesel as engine power. Gas generators have the advantages of wide output power range, high start-up and operation reliability, good power generation quality, light weight, small size, simple maintenance, low noise, energy saving and environmental protection, etc. At present, gas-fired generators have become more popular in developed countries, and have been rapidly promoted in the domestic market, with good market prospects. [0003] The generator connecting rod is responsible for power transmission, bears a large load, and works in a high temperature environment for a long time, so the uniformity of chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/44C22C38/22
Inventor 卢秉军齐峰
Owner BENGANG STEEL PLATES
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