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Alloy hammerhead and preparation method thereof

A technology of alloy and hammer head, which is applied in the field of alloy hammer head and its preparation, can solve the problems of mismatch of impact toughness and wear resistance, difficulty in large-scale promotion, high preparation cost, etc., and achieve the effect of excellent strength and wear resistance

Active Publication Date: 2019-05-10
承德燕北冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned methods have realized the improvement of the hammer head by adjusting the components. However, when applied to high-strength crushing conditions, there are still many problems such as insufficient strength, mismatch between impact toughness and wear resistance, and high preparation costs. , it is difficult to obtain large-scale promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment provides a kind of alloy hammer head, by mass percentage, described alloy hammer head comprises following composition: C 2.5%, Si 0.8%, Mn 0.6%, Mo 0.5%, Ni 1.2%, Cu 1.2% %, Cr 25%, V 0.5%, Ti0.3%, Re 0.5%, the balance is Fe and unavoidable impurities, among them, S≤0.05%, P≤0.08%.

[0056] Prepare as follows:

[0057] (1) Use a one-ton intermediate frequency furnace for smelting, and make ingredients according to the formula amount. First, add some small pieces of scrap steel for smelting, and then add high-carbon ferrochrome, low-carbon ferrochrome, and some scrap steel; when the alloy liquid in the furnace reaches 2 / 3, Add nickel plate, ferromolybdenum, copper, remaining steel scrap. After all the furnace materials are melted, take samples for testing, and adjust the chemical composition to be qualified; add high-carbon ferromanganese 7 minutes before the furnace is released, and add ferrosilicon 4 minutes before the furnace is released. When the tem...

Embodiment 2

[0062] This embodiment provides a kind of alloy hammer head, by mass percentage, described alloy hammer head comprises the following components: C 3.0%, Si 0.8%, Mn 0.5%, Mo 1.0%, Ni 1.2%, Cu 0.7 %, Cr 28%, V 0.25%, Ti0.5%, Re 0.2%, the balance is Fe and unavoidable impurities, among them, S≤0.05%, P≤0.08%.

[0063] Prepare as follows:

[0064] (1) with embodiment 1 step (1);

[0065] (2) with embodiment 1 step (2);

[0066] (3) with embodiment 1 step (3);

[0067] (4) Put the castings cleaned in step (3) into the heat treatment furnace. The heating rate is 85°C / h. After heating up at 160°C, tempering treatment was carried out, the temperature was kept at 280°C for 2.5 hours, and the alloy hammer head was obtained after air cooling.

Embodiment 3

[0069] This embodiment provides a kind of alloy hammer head, by mass percentage, described alloy hammer head comprises following composition: C 2.4%, Si 0.4%, Mn 0.8%, Mo 0.8%, Ni 0.8%, Cu 1.3 %, Cr 24%, V 0.3%, Ti0.1%, Re 0.5%, the balance is Fe and unavoidable impurities, among them, S≤0.05%, P≤0.08%.

[0070] Prepare as follows:

[0071] (1) with embodiment 1 step (1);

[0072] (2) with embodiment 1 step (2);

[0073] (3) with embodiment 1 step (3);

[0074] (4) Put the castings cleaned in step (3) into the heat treatment furnace. The heating rate is 70°C / h. After 850°C, adjust the heating rate to 110°C / h. Keep warm at 1300°C for 3 hours and leave the furnace for air quenching. After 160°C, the temperature was raised for tempering treatment, kept at 250°C for 3.5 hours, and air-cooled to obtain the alloy hammer head.

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Abstract

The invention relates to an alloy hammerhead and a preparation method thereof. The alloy hammerhead is prepared from following components in percent by mass: 2.4-3.0% of C, 0.4-1.0% of Si, 0.5-1.0% ofMn, 0.5-1.0% of Mo, 0.5-1.5% of Ni, 0.5-2.0% of Cu, 23-28% of Cr, 0.2-0.5% of V, 0.1-0.5% of Ti, 0.2-0.5% of Re and the balance Fe and inevitable impurities. The alloy hammerhead with the structure prepared from martensite, net-shaped M7C3 carbide, secondary carbide and retained austenite is prepared, the obtained hammerhead has excellent strength and abrasion resistance on the premise that the impact toughness meets requirements, the Rockwell hardness HRV of the hammerhead is 59.5-65.2, the impact toughness is 8.4-12.5 J / cm<2>, and excellent performance is shown under the high-strength breaking working condition.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to an alloy hammer head and a preparation method thereof. Background technique [0002] The traditional hammer head production is generally made of high manganese steel. Its composition requirements range is wide, as follows: C 1.1-1.5%, Si 0.3-1.0%, Mn 11-14%, S≦0.05%, P≦0.08%, as-cast structure is austenite matrix, grain And there are a lot of carbides on the grain boundaries. After water toughening treatment, it is mainly austenite + cementite. In actual use, it has high hardness and low impact resistance, and is suitable for crushing general materials. [0003] At present, for the crushing of steel slag in steel mills, especially the crushing of vanadium-titanium steel slag, the service life of high manganese steel hammers is too short, which directly leads to high production costs of steel slag crushing. How to explore a set of practical methods to improve the quality of the hamme...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08C22C33/08C21D1/18C21D9/00
Inventor 王文会王雪原姜凤山
Owner 承德燕北冶金材料有限公司
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