Preparation method of low-alloy high-wear-resistance cast steel

Abstract

The invention relates to a preparation method of low-alloy high-wear-resistance steel cast. The low-alloy high-wear-resistance steel cast comprises the following components: 0.25-0.35 wt.% of C, 0.9-1.6 wt.% of Si, 0.3-1.8 wt.% of Mn, 0.7-1.0 wt.% of Cr, 0.15-0.3wt.% of Mo, 0.05-0.35wt.% of Ti, 0.01-0.05 wt.% of Nb, 0.05-0.25 wt.% of V, 0.01-0.1 wt.% of RE, at most 0.03 wt.% of P and S, and the balance of Fe. The preparation method comprises the following steps: melting the components, casting to form, heating the treated casting, and keeping the temperature when the temperature reaches 1050-1070 DEG C; and after finishing keeping the temperature, putting the casting in a 240-245 DEG C salt bath furnace, keeping the temperature, discharging, and cooling in air. The casting and heat treatment technique is simple and easy to control and low in cost; and the prepared material has favorable toughness compatibility.

Description

technical field

[0001] The invention relates to a manufacturing technology of wear-resistant cast steel used under impact, in particular to a preparation method of low-alloy high wear-resistant cast steel. Background technique

[0002] Wear is a common phenomenon in the industrial field and daily life, and it is also an important cause of material and energy loss. This ancient and complex problem has always been one of the focuses of people's attention. Abrasion is one of the main failure modes of materials, and the economic loss it causes is very huge. For example, according to figures released by the United States in the 1980s, the annual loss due to wear and tear was as high as one billion U.S. dollars, the loss caused by wear and tear in the former Soviet Union reached 12 billion rubles each year, and the loss caused by friction and wear in the Federal Republic of Germany exceeded 10 billion West Deutschmarks each year. . At present, my country still lacks comprehensiv...

Examples

Embodiment 1

[0048] 1) Use scrap steel, ferrosilicon, ferromanganese, ferrosilicon, ferromolybdenum, ferrochrome, ferrotitanium, ferrovanadium, ferroniobium, and rare earth silicon as raw materials for smelting, and make ingredients according to the following components: C: 0.25 wt.%;

[0049] Si: 0.9 wt.%;

[0050] Mn: 0.3 wt.%;

[0051] Cr: 0.7 wt.%;

[0052] Mo: 0.15 wt.%;

[0053] Ti: 0.05 wt.%;

[0054] Nb: 0.01 wt.%;

[0055] V: 0.05 wt.%;

[0056] RE: 0.01 wt.%;

[0057] P, S≤0.01 wt.%

[0058] The rest is Fe and unavoidable impurities;

[0059] 2) Using medium frequency induction furnace for smelting, first heat and melt ordinary steel scrap and ferrochrome, and conduct pre-furnace analysis;

[0060] 3) Add ferromanganese, ferrosilicon, and ferromolybdenum in turn, wait until all are melted, then add ferrochrome and then further melt, deoxidize with aluminum wire, then pour molten steel into it and place ferrotitanium, ferrosilicon, ferroniobium, and rare earth at the same ...

Embodiment 2

[0066] 1) Use steel scrap, ferrosilicon, ferromanganese, ferrosilicon, ferromolybdenum, ferrochrome, ferrotitanium, ferrovanadium, ferroniobium, and rare earth silicon as raw materials for smelting, and make ingredients according to the following components: C: 0.3 wt.%;

[0067] Si: 1.2 wt.%;

[0068] Mn: 1.0 wt.%;

[0069] Cr: 0.85 wt.%;

[0070] Mo: 0.2 wt.%;

[0071] Ti: 0.25 wt.%;

[0072] Nb: 0.03 wt.%;

[0073] V: 0.15 wt.%;

[0074] RE: 0.06 wt.%;

[0075] P, S≤0.02 wt.%

[0076] The rest is Fe and unavoidable impurities;

[0077] 2) Using medium frequency induction furnace for smelting, first heat and melt ordinary steel scrap and ferrochrome, and conduct pre-furnace analysis;

[0078] 3) Add ferromanganese, ferrosilicon, and ferromolybdenum in turn, wait until all are melted, then add ferrochrome and then further melt, deoxidize with aluminum wire, then pour molten steel into it and place ferrotitanium, ferrosilicon, ferroniobium, and rare earth at the same t...

Embodiment 3

[0084] 1) Use scrap steel, ferrosilicon, ferromanganese, ferrosilicon, ferromolybdenum, ferrochrome, ferrotitanium, ferrovanadium, ferroniobium, and rare earth silicon as raw materials for smelting, and make ingredients according to the following components: C: 0.35 wt.%;

[0085] Si: 1.6 wt.%;

[0086] Mn: 1.8 wt.%;

[0087] Cr: 1.0 wt.%;

[0088] Mo: 0.3 wt.%;

[0089] Ti: 0.35 wt.%;

[0090] Nb: 0.05 wt.%;

[0091] V: 0.25 wt.%;

[0092] RE: 0.1 wt.%;

[0093] P, S≤0.03 wt.%

[0094] The rest is Fe and unavoidable impurities;

[0095] 2) Using medium frequency induction furnace for smelting, first heat and melt ordinary steel scrap and ferrochrome, and conduct pre-furnace analysis;

[0096] 3) Add ferromanganese, ferrosilicon, and ferromolybdenum in turn, wait until all are melted, then add ferrochrome and then further melt, deoxidize with aluminum wire, then pour molten steel into it and place ferrotitanium, ferrosilicon, ferroniobium, and rare earth at the same time...

technical field

[0001] The invention relates to a manufacturing technology of wear-resistant cast steel used under impact, in particular to a preparation method of low-alloy high wear-resistant cast steel. Background technique

[0002] Wear is a common phenomenon in the industrial field and daily life, and it is also an important cause of material and energy loss. This ancient and complex problem has always been one of the focuses of people's attention. Abrasion is one of the main failure modes of materials, and the economic loss it causes is very huge. For example, according to figures released by the United States in the 1980s, the annual loss due to wear and tear was as high as one billion U.S. dollars, the loss caused by wear and tear in the former Soviet Union reached 12 billion rubles each year, and the loss caused by friction and wear in the Federal Republic of Germany exceeded 10 billion West Deutschmarks each year. . At present, my country still lacks comprehensiv...

Examples

Embodiment 1

[0048] 1) Use scrap steel, ferrosilicon, ferromanganese, ferrosilicon, ferromolybdenum, ferrochrome, ferrotitanium, ferrovanadium, ferroniobium, and rare earth silicon as raw materials for smelting, and make ingredients according to the following components: C: 0.25 wt.%;

[0049] Si: 0.9 wt.%;

[0050] Mn: 0.3 wt.%;

[0051] Cr: 0.7 wt.%;

[0052] Mo: 0.15 wt.%;

[0053] Ti: 0.05 wt.%;

[0054] Nb: 0.01 wt.%;

[0055] V: 0.05 wt.%;

[0056] RE: 0.01 wt.%;

[0057] P, S≤0.01 wt.%

[0058] The rest is Fe and unavoidable impurities;

[0059] 2) Using medium frequency induction furnace for smelting, first heat and melt ordinary steel scrap and ferrochrome, and conduct pre-furnace analysis;

[0060] 3) Add ferromanganese, ferrosilicon, and ferromolybdenum in turn, wait until all are melted, then add ferrochrome and then further melt, deoxidize with aluminum wire, then pour molten steel into it and place ferrotitanium, ferrosilicon, ferroniobium, and rare earth at the same ...

Embodiment 2

[0066] 1) Use steel scrap, ferrosilicon, ferromanganese, ferrosilicon, ferromolybdenum, ferrochrome, ferrotitanium, ferrovanadium, ferroniobium, and rare earth silicon as raw materials for smelting, and make ingredients according to the following components: C: 0.3 wt.%;

[0067] Si: 1.2 wt.%;

[0068] Mn: 1.0 wt.%;

[0069] Cr: 0.85 wt.%;

[0070] Mo: 0.2 wt.%;

[0071] Ti: 0.25 wt.%;

[0072] Nb: 0.03 wt.%;

[0073] V: 0.15 wt.%;

[0074] RE: 0.06 wt.%;

[0075] P, S≤0.02 wt.%

[0076] The rest is Fe and unavoidable impurities;

[0077] 2) Using medium frequency induction furnace for smelting, first heat and melt ordinary steel scrap and ferrochrome, and conduct pre-furnace analysis;

[0078] 3) Add ferromanganese, ferrosilicon, and ferromolybdenum in turn, wait until all are melted, then add ferrochrome and then further melt, deoxidize with aluminum wire, then pour molten steel into it and place ferrotitanium, ferrosilicon, ferroniobium, and rare earth at the same t...

Embodiment 3

[0084] 1) Use scrap steel, ferrosilicon, ferromanganese, ferrosilicon, ferromolybdenum, ferrochrome, ferrotitanium, ferrovanadium, ferroniobium, and rare earth silicon as raw materials for smelting, and make ingredients according to the following components: C: 0.35 wt.%;

[0085] Si: 1.6 wt.%;

[0086] Mn: 1.8 wt.%;

[0087] Cr: 1.0 wt.%;

[0088] Mo: 0.3 wt.%;

[0089] Ti: 0.35 wt.%;

[0090] Nb: 0.05 wt.%;

[0091] V: 0.25 wt.%;

[0092] RE: 0.1 wt.%;

[0093] P, S≤0.03 wt.%

[0094] The rest is Fe and unavoidable impurities;

[0095] 2) Using medium frequency induction furnace for smelting, first heat and melt ordinary steel scrap and ferrochrome, and conduct pre-furnace analysis;

[0096] 3) Add ferromanganese, ferrosilicon, and ferromolybdenum in turn, wait until all are melted, then add ferrochrome and then further melt, deoxidize with aluminum wire, then pour molten steel into it and place ferrotitanium, ferrosilicon, ferroniobium, and rare earth at the same time...

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