阅读说明：本技术 一种高铬合金铸球及其铸造方法 (A kind of high-chromium alloy cast ball and its casting method ) 是由 蔡发华 于 2019-09-29 设计创作，主要内容包括：本发明提供一种高铬合金铸球及其铸造方法,该高铬合金铸球中各组分及其重量百分比为：C 1.6-2.5％、Cr 15-19％、Cu 0.7-1.1％、Mn 0.2-0.7％、Mo 0.4-0.8％、V 0.02-0.05％、Y 0.1-0.4％、B 0.7-1.2％、Nb 0.004-0.009％、Ta 0.002-0.007％、P<0.02％、S<0.01％,余量为Fe。其铸造方法,包括以下步骤：1)原料熔炼：将按比例计算好各原料加入到高频感应电炉中进行高温熔炼,炉料完全融化后,加入除渣剂进行除渣,加入0.05％的铝进行脱氧后出炉,出炉过程中随流加入孕育剂；2)浇注成型：浇注温度为1420-1440℃,浇注时间为5-9分钟,得高铬合金铸球初成品；3)将高铬合金铸球初成品进行热处理后得到高铬合金铸球成品。该高铬合金铸球具有优异的耐磨性能和抗冲击性能,硬度高,使用寿命长。(The present invention provides a kind of high-chromium alloy cast ball and its casting method, each component and its weight percent in the high-chromium alloy cast ball are as follows: C 1.6-2.5%, Cr 15-19%, Cu 0.7-1.1%, Mn 0.2-0.7%, Mo 0.4-0.8%, V 0.02-0.05%, Y 0.1-0.4%, B 0.7-1.2%, Nb 0.004-0.009%, Ta 0.002-0.007%, P < 0.02%, S < 0.01%, surplus Fe.Its casting method, the following steps are included: 1) raw material melting: each raw material will be calculated in proportion be added in high-frequency induction furnace and carry out high melt, after furnace charge melts completely, deslagging agent is added to remove the gred, it comes out of the stove after 0.05% aluminium progress deoxidation is added, inovulant is added with stream during coming out of the stove；2) moulding by casting: pouring temperature is 1420-1440 DEG C, and the duration of pouring is 5-9 minutes, obtains high-chromium alloy cast ball first product；3) high-chromium alloy cast ball finished product is obtained after being heat-treated high-chromium alloy cast ball first product.The high-chromium alloy cast ball has excellent wear-resisting property and shock resistance, and hardness is high, long service life.)

1. a kind of high-chromium alloy cast ball, which is characterized in that each component and its weight percent in the high-chromium alloy cast ball are as follows: C 1.6-2.5%, Cr 15-19%, Cu 0.7-1.1%, Mn 0.2-0.7%, Mo 0.4-0.8%, V 0.02-0.05%, Y 0.1-0.4%, B 0.7-1.2%, Nb 0.004-0.009%, Ta 0.002-0.007%, P < 0.02%, S < 0.01%, it is remaining Amount is Fe.

2. high-chromium alloy cast ball as described in claim 1, which is characterized in that each component and its weight in the high-chromium alloy cast ball Percentage are as follows: C 1.9-2.2%, Cr 16-18%, Cu 0.8-1%, Mn 0.4-0.6%, Mo 0.5-0.7%, V 0.03- 0.04%, Y 0.2-0.3%, B 0.9-1.1%, Nb 0.005-0.007%, Ta 0.004-0.006%, P < 0.02%, S < 0.01%, surplus Fe.

3. high-chromium alloy cast ball as claimed in claim 2, which is characterized in that each component and its weight in the high-chromium alloy cast ball Percentage is C 2%, Cr 17%, Cu 0.9%, Mn 0.5%, Mo 0.6%, V 0.03%, Y 0.2%, B 1%, Nb 0.006%, Ta 0.005%, P < 0.02%, S < 0.01%, surplus Fe.

4. the casting method of high-chromium alloy cast ball as described in any one of claims 1-3, which is characterized in that including following step It is rapid:

1) raw material melting: will calculate each raw material in proportion and be added in high-frequency induction furnace and carry out high melt, and furnace charge is complete After thawing, deslagging agent is added and removes the gred, comes out of the stove after 0.05% aluminium progress deoxidation is added, be added and breed with stream during coming out of the stove Agent；

2) moulding by casting: pouring temperature is 1420-1440 DEG C, and the duration of pouring is 5-9 minutes, obtains high-chromium alloy cast ball first product；

3) high-chromium alloy cast ball finished product is obtained after being heat-treated high-chromium alloy cast ball first product.

5. the casting method of high-chromium alloy cast ball as claimed in claim 4, which is characterized in that in step 1), smelting temperature is 1430-1510 DEG C, tapping temperature is 1560-1600 DEG C.

6. the casting method of high-chromium alloy cast ball as claimed in claim 4, which is characterized in that in inovulant described in step 1) Each element mass percent is Si 60-75%, Ba 7-9%, Ca 1.2-1.8%, Sr 3-6%, Re 0.4-1.1%, Mg 0.5-1%, P < 0.02%, S < 0.01%, surplus are iron and inevitable microelement.

7. the casting method of high-chromium alloy cast ball as claimed in claim 4, which is characterized in that the heat treatment process are as follows:

1) it anneals: the high-chromium alloy cast ball first product obtained after casting is air-cooled to room temperature；

2) primary quenching: step 1) cast ball after cooling is entered into furnace, 880-920 is warming up to the heating rate of 100-140 DEG C/h DEG C, after keeping the temperature 1-3h, while using air-cooled and water-cooled cooling to 330-360 DEG C；

3) secondary quenching: will treated that cast ball enters furnace is warming up to 800- with the heating rate of 120-130 DEG C/h by step 1) 850 DEG C, after keeping the temperature 6-8h, 240-270 DEG C is cooled to through oil is cold.

4) it is tempered: 520-550 DEG C will be warming up to by step 2) treated cast ball enters furnace with the heating rate of 140 DEG C/h, and protected It is air-cooled to be down to room temperature when water-cooled cooling is to 180-200 DEG C after warm 12-15h.

Technical field

The present invention relates to wear-resistant material technical fields, and in particular to a kind of high-chromium alloy cast ball and its casting method.

Background technique

The mankind alreadyd exceed for more than 2400 years using the history of cast iron, can trace back to the Spring and Autumn and the Warring States Periods earliest applied to agriculture The ploughshare of industry production.However due to cast iron there are poor toughness, it is easy to crack, casting and forming is difficult the defects of, it is very one section long behind In time, application is not widely popularized.Early 20th century, by the progress of smelting and foundry engieering, scientific research personnel is to cast iron The toughness and wearability for having done a large amount of improvement, especially cast iron significantly improve, and so far have evolved into a kind of important wear-resisting material Material.

Representative of the rich chromium cast iron as antifriction metal (AFM), because the characteristics of its institutional framework, in hardness, toughness, wear-resistant material mill Damage performance and oil resistant polishing machine etc. possess excellent comprehensive performance, are a kind of height excellent using most common wearability Alloy abrasion resistance material.In the classification of chromium family wear-resisting cast iron usually containing chromium lower than 5% become low-chromium cast-iron, 5%-11% containing chromium Become medium chrome cast iron, chromium content be higher than 12% when, be known as rich chromium cast iron using iron, carbon, chromium as the modified alloy of alloy main component.

Abrasion is to lead to one of the reason of components consumption is with damage, is to cause the energy and the dual waste of resource and influence An important factor for safety and stability produces.Therefore, wear-resistant material makes extensively in the production fields such as building materials, mining industry, chemical industry, agricultural machinery With the special industrial field such as biomedicine, electronic information also has specific demand to wear-resistant material.Therefore, try to explore performance more Become this field a technical problem to be solved urgently for outstanding wear-resistant material.

Summary of the invention

(1) the technical issues of solving

In view of the deficiencies of the prior art, the present invention provides a kind of high-chromium alloy cast ball and its casting method, which is closed Golden cast ball has excellent wear-resisting property and shock resistance, and hardness is high, long service life.

(2) technical solution

In order to achieve the above object, the present invention is achieved by the following technical programs:

A kind of high-chromium alloy cast ball, each component and its weight percent in the high-chromium alloy cast ball are as follows: C 1.6-2.5%, Cr 15-19%, Cu 0.7-1.1%, Mn 0.2-0.7%, Mo 0.4-0.8%, V 0.02-0.05%, Y 0.1-0.4%, B 0.7-1.2%, Nb 0.004-0.009%, Ta 0.002-0.007%, P < 0.02%, S < 0.01%, surplus Fe.

Preferably, each component and its weight percent in the high-chromium alloy cast ball are as follows: C 1.9-2.2%, Cr 16-18%, Cu 0.8-1%, Mn 0.4-0.6%, Mo 0.5-0.7%, V 0.03-0.04%, Y 0.2-0.3%, B 0.9-1.1%, Nb 0.005-0.007%, Ta 0.004-0.006%, P < 0.02%, S < 0.01%, surplus Fe.

Preferably, in the high-chromium alloy cast ball each component and its weight percent be C 2%, Cr 17%, Cu 0.9%, Mn 0.5%, Mo 0.6%, V 0.03%, Y 0.2%, B 1%, Nb 0.006%, Ta 0.005%, P < 0.02%, S < 0.01%, surplus Fe.

The casting method of above-mentioned high-chromium alloy cast ball, comprising the following steps:

1) raw material melting: will calculate each raw material in proportion and be added in high-frequency induction furnace and carry out high melt, furnace charge After melting completely, deslagging agent is added and removes the gred, comes out of the stove after 0.05% aluminium progress deoxidation is added, be added during coming out of the stove with stream Inovulant；

2) moulding by casting: pouring temperature is 1420-1440 DEG C, and the duration of pouring is 5-9 minute, obtain at the beginning of high-chromium alloy cast ball at Product；

3) high-chromium alloy cast ball finished product is obtained after being heat-treated high-chromium alloy cast ball first product.

5, the casting method of high-chromium alloy cast ball as claimed in claim 4, in step 1), smelting temperature 1430- 1510 DEG C, tapping temperature is 1560-1600 DEG C.

Further, each element mass percent is Si 60-75%, Ba 7-9%, Ca in inovulant in step 1) 1.2-1.8%, Sr 3-6%, Re 0.4-1.1%, Mg 0.5-1%, P < 0.02%, S < 0.01%, surplus are iron and can not The microelement avoided.

Further, heat treatment process in step 3) are as follows:

1) it anneals: the high-chromium alloy cast ball first product obtained after casting is air-cooled to room temperature；

2) primary quenching: step 1) cast ball after cooling is entered into furnace, 880- is warming up to the heating rate of 100-140 DEG C/h 920 DEG C, after keeping the temperature 1-3h, while using air-cooled and water-cooled cooling to 330-360 DEG C；

3) secondary quenching: will treated that cast ball enters furnace is warming up to the heating rate of 120-130 DEG C/h by step 1) 800-850 DEG C, after keeping the temperature 6-8h, 240-270 DEG C is cooled to through oil is cold.

4) be tempered: will by step 2) treated that cast ball enters furnace is warming up to 520-550 with the heating rate of 140 DEG C/h DEG C, it is air-cooled to be down to room temperature when water-cooled cooling is to 180-200 DEG C after keeping the temperature 12-15h.

(3) beneficial effect

The present invention provides a kind of high-chromium alloy cast ball and its casting methods, and in the formula of high-chromium alloy cast ball, boron is former Son differs smaller with the radius of carbon atom, can displace carbon atom in matrix, so that carbon atom increases in molten metal bath, has Conducive to the nucleation rate for improving rich chromium cast iron, also hard carbide can be formed with carbon etc., improve the hardness of high-chromium alloy cast ball and resistance to Mill property；The intensity of alloy cast ball can be improved in yttrium, improves passivation ability, forms more protective passivating film；Base can be enhanced in copper The consistency of body strengthens tissue, improves the hardness of alloy；Manganese can reduce temperature of the austenite to perlitic transformation, have strong The effect of strong stable austenite, makes in quenched alloy cast ball that there are a large amount of retained austenites, especially matches with copper, molybdenum It closes, the harden ability of alloy cast ball can be significantly improved, have the function of synergy, further increase its wear-resisting property.Molybdenum can also Molybdenum carbon compound is formed with carbon, further increases the hardness of alloy cast ball.Vanadium can refine crystal, can form high-hardness, wearable Property VC, conducive to improve alloy cast ball performance, in addition the present invention in, the rational proportion of carbon chromium makes vanadium, molybdenum to alloy cast ball The function and effect of matrix are more preferable.

High-chromium alloy cast ball of the present invention carries out inoculation in casting, by the way that inovulant is added into melt, can improve Graphite form and distribution situation increase eutectic cell quantity, refine matrix, improve the mechanical property of cast ball.At heat of the invention Living, secondary quenching is moved back in the use of science and engineering skill and tempering is handled, and balances by treated cast ball interior tissue, crystal grain is more Carefully, partial austenitic is changed into martensite, so that cast ball of the present invention is hard simultaneously with excellent wearability and shock resistance Degree is high, and mechanical property is more preferable, long service life.

Specific embodiment

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention, Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.