WO2019061238A1 - Machining process for automobile output shaft casting - Google Patents

Machining process for automobile output shaft casting Download PDF

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Publication number
WO2019061238A1
WO2019061238A1 PCT/CN2017/104231 CN2017104231W WO2019061238A1 WO 2019061238 A1 WO2019061238 A1 WO 2019061238A1 CN 2017104231 W CN2017104231 W CN 2017104231W WO 2019061238 A1 WO2019061238 A1 WO 2019061238A1
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Prior art keywords
parts
output shaft
sand
automobile
weight
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PCT/CN2017/104231
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French (fr)
Chinese (zh)
Inventor
浦巧生
管宪德
朱兴明
姚庆华
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吴江市液铸液压件铸造有限公司
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Priority to PCT/CN2017/104231 priority Critical patent/WO2019061238A1/en
Publication of WO2019061238A1 publication Critical patent/WO2019061238A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting

Definitions

  • the invention relates to a processing technology of an automobile output shaft casting, and belongs to the technical field of casting.
  • the vehicle power output shaft assembly acts to transmit torque during the running of the vehicle, and transmits the engine power to the transaxle through the secondary transmission mechanism, thereby driving the vehicle forward or backward. Therefore, the power output shaft assembly used in a high-powered automobile needs to have a large bearing capacity, and many casting processes are used in the production of the automobile output shaft.
  • the present invention provides a machining process for an automobile output shaft casting.
  • a machining process for an automobile output shaft casting includes the following steps:
  • Type sand molding the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
  • pouring pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
  • Cooling After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
  • the processing technology of the automobile output shaft casting, the molding sand used in the step (2) comprises the following raw materials by weight: 80-100 parts of quartz sand, 10-16 parts of glass fiber, 5-6 parts of sodium silicate 10-12 parts of modified starch, 4-8 parts of silicone oil and 2-6 parts of silane coupling agent.
  • modified starch is obtained by placing the starch in water, heating to 70-75 ° C, adjusting the pH to 5-6, adding ⁇ -amylase , the reaction is 60-80 min; the reaction is terminated by cooling, and tributyl phosphate, acrylic acid and chitosan are sequentially added under stirring, and the modified starch is obtained after 30-40 min.
  • the processing method of the automobile output shaft casting is as follows: the weight fraction of water, tributyl phosphate, acrylic acid and chitosan is 300-500 parts, 20-30, respectively. Parts, 40-60 parts and 10-20 parts.
  • the processing method of the automobile output shaft casting wherein the refining agent comprises the following raw materials by weight: 30-40 parts of calcium oxide, 3-8 parts of silica, 18-22 parts of aluminum oxide, oxidation 8-12 parts of magnesium, 5-10 parts of cesium fluoride, 10-20 parts of carbon tetrachloride, 5-10 parts of nano ceramics and 3-8 parts of calcium carbide.
  • the refining agent is added in an amount of 0.1-0.15% of the total weight of the molten steel.
  • the processing method of the invention is carried out by using molten steel after refining, thereby reducing the shrinkage hole on the surface of the casting, improving the precision of the casting, and improving the strength of the casting by heat treatment after the completion of casting, and is suitable for casting the output shaft of the automobile.
  • the molding sand of the invention uses quartz sand as the main raw material, and adds glass fiber, sodium silicate and modified starch, has less gas generation, and does not contain harmful elements such as nitrogen, phosphorus and sulfur, and has good hardening effect, and passes through silicone oil and silane coupling agent.
  • the air permeability of the quartz sand is improved; the prepared bending sand has a bending strength of 6-9 MPa at normal temperature, a burning loss of 1.4-2.3%, and a thermal bending strength of 4-6 MPa.
  • the air permeability is 110-128, and the hot-humid tensile strength is 4-6 KPa.
  • the refining agent of the invention can be quickly melted, can refine the steel liquid crystal particles, improve the quality of the molten steel, improve the density of the casting, has good desulfurization and deoxidation effect, and the desulfurization rate is 80-85%.
  • a machining process for an automobile output shaft casting includes the following steps:
  • Type sand molding the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
  • pouring pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
  • Cooling After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
  • the molding sand used in the step (2) comprises the following raw materials by weight: 80 parts of quartz sand, 16 parts of glass fiber, 5 parts of sodium silicate, 12 parts of modified starch, 4 parts of silicone oil and 6 parts of silane coupling agent. .
  • the modified starch is obtained by placing the starch in water, heating to 70-75 ° C, adjusting the pH to 5-6, adding ⁇ -amylase, reacting for 60-80 min; cooling is terminated. In the reaction, tributyl phosphate, acrylic acid and chitosan are sequentially added under stirring, and the modified starch is obtained after reacting for 30-40 minutes.
  • the parts by weight of water, tributyl phosphate, acrylic acid and chitosan are 300 parts by weight, 20 parts, 60 parts and 10 parts by weight, respectively, based on 100 parts by weight of the starch.
  • the refining agent comprises the following parts by weight of raw materials: 30 parts of calcium oxide, 8 parts of silica, 18 parts of alumina, 12 parts of magnesium oxide, 5 parts of cesium fluoride, 10 parts of carbon tetrachloride, nano ceramics 5 parts and 3 parts of calcium carbide.
  • a machining process for an automobile output shaft casting includes the following steps:
  • Type sand molding the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
  • pouring pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
  • Cooling After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
  • the molding sand used in the step (2) comprises the following raw materials by weight: 100 parts of quartz sand, 10 parts of glass fiber, 6 parts of sodium silicate, 10 parts of modified starch, 8 parts of silicone oil and 2 parts of silane coupling agent. .
  • the modified starch is obtained by the following steps: placing the starch in water and raising the temperature to 70-75 ° C, adjust the pH of 5-6, add ⁇ -amylase, reaction 60-80min; stop the reaction by cooling, add tributyl phosphate, acrylic acid and chitosan under stirring, after 30-40min reaction,
  • the modified starch can be obtained.
  • the parts by weight of water, tributyl phosphate, acrylic acid and chitosan are 500 parts by weight, 30 parts by weight, 40 parts by weight and 20 parts by weight, respectively, based on 100 parts by weight of the starch.
  • the refining agent comprises the following parts by weight of raw materials: 40 parts of calcium oxide, 3 parts of silica, 22 parts of alumina, 8 parts of magnesium oxide, 10 parts of cesium fluoride, 20 parts of carbon tetrachloride, nano ceramics 5 parts and 8 parts of calcium carbide.
  • a machining process for an automobile output shaft casting includes the following steps:
  • Type sand molding the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
  • pouring pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
  • Cooling After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
  • the molding sand used in the step (2) comprises the following raw materials by weight: 80-100 parts of quartz sand, 10-16 parts of glass fiber, 5-6 parts of sodium silicate, 10-12 parts of modified starch, silicone oil 4 -8 parts and 2-6 parts of a silane coupling agent.
  • the modified starch is obtained by placing the starch in water, heating to 70-75 ° C, adjusting the pH to 5-6, adding ⁇ -amylase, reacting for 60-80 min; cooling to terminate the reaction, under stirring conditions
  • the modified tributyl phosphate, acrylic acid and chitosan are sequentially added, and after 30-40 min, the modified starch is obtained.
  • the parts by weight of water, tributyl phosphate, acrylic acid and chitosan are 300-500 parts, 20-30 parts, 40-60 parts and 10-20 parts, respectively, based on 100 parts by weight of the starch.
  • the refining agent comprises the following raw materials by weight: 30-40 parts of calcium oxide, 3-8 parts of silica, 18-22 parts of alumina, 8-12 parts of magnesium oxide, 5-10 parts of barium fluoride 10-20 parts of carbon tetrachloride, 5-10 parts of nano ceramics and 3-8 parts of calcium carbide.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)
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Abstract

A machining process for an automobile output shaft casting, comprising the following steps: (1) manufacturing a mold; (2) molding by means of molding sand; (3) smelting steel into liquid steel; (4) pouring; and (5) cooling. The machining process performs pouring by using refined liquid steel, reducing the shrinkage cavities on the surface of the casting, improving the accuracy of the casting, and improving, after pouring, the strength of the casting by means of heat treatment; the invention is suitable for casting the automobile output shafts.

Description

一种汽车输出轴铸件的加工工艺Processing technology of automobile output shaft casting 技术领域Technical field
本发明涉及一种汽车输出轴铸件的加工工艺，属于铸造技术领域。The invention relates to a processing technology of an automobile output shaft casting, and belongs to the technical field of casting.
背景技术Background technique
汽车动力输出轴总成在汽车行驶过程中起传递扭矩的作用，其将发动机动力通过二级传动机构传递给驱动桥，从而驱动汽车前进或后退。因此，大马力汽车上使用的动力输出轴总成，需要有较大的承载力，在制作汽车输出轴时，很多采用铸造工艺。The vehicle power output shaft assembly acts to transmit torque during the running of the vehicle, and transmits the engine power to the transaxle through the secondary transmission mechanism, thereby driving the vehicle forward or backward. Therefore, the power output shaft assembly used in a high-powered automobile needs to have a large bearing capacity, and many casting processes are used in the production of the automobile output shaft.
但是在目前的铸造工艺中，处理不当则得到的铸钢件容易产生裂纹、砂眼、气孔等缺陷，影响了产品质量，为后续工艺处理造成了很大的困难，增加了生产成本。However, in the current casting process, the steel castings obtained by improper treatment are prone to cracks, blisters, pores and the like, which affect the quality of the product, which causes great difficulties for subsequent processing and increases production costs.
发明内容Summary of the invention
为了克服现有技术的不足，本发明提供了一种汽车输出轴铸件的加工工艺。In order to overcome the deficiencies of the prior art, the present invention provides a machining process for an automobile output shaft casting.
本发明是通过以下技术方案来实现的：The present invention is achieved by the following technical solutions:
一种汽车输出轴铸件的加工工艺，包括以下几个步骤：A machining process for an automobile output shaft casting includes the following steps:
(1)制作模具：根据汽车输出轴的形状制作模具；(1) Making a mold: making a mold according to the shape of the output shaft of the automobile;
(2)型砂造型：将模具放入型砂盒中，得到砂型，将砂型在温度为600-700℃的条件下，烘10-15min，随后降温至350-380℃备用；(2) Type sand molding: the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
(3)熔炼钢水：将钢材置于电炉中熔炼，待温度升至为1600-1700℃，加入精炼剂，精炼15-20min，得到钢水，钢水中含硫量小于0.02％，含磷量小于0.02％，含碳量为0.04-0.06％，含硅量0.2-0.25％，含锰量0.35-0.45％，含镍量0.15-0.25％；(3) Melting molten steel: the steel is smelted in an electric furnace, and the temperature is raised to 1600-1700 ° C. The refining agent is added and refined for 15-20 min to obtain molten steel. The sulfur content in the molten steel is less than 0.02%, and the phosphorus content is less than 0.02. %, carbon content is 0.04-0.06%, silicon content is 0.2-0.25%, manganese content is 0.35-0.45%, and nickel content is 0.15-0.25%;
(4)浇注：往砂型中浇注钢水，浇注温度为1580-1600℃；浇注完成后进行热处理，热处理具体步骤为：快速降温至300-400℃，保温50-60min，升温至860-900℃，保温50-60min，降温至350-380℃，保温30-40min，再回温至650-680℃，保温50-60min； (4) pouring: pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
(5)冷却：自然冷却后，清理铸件表面，切除浇口、冒口、铲磨毛刺和披缝等凸出物，再次清理残砂，即可得到汽车输出轴铸件。(5) Cooling: After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
所述的一种汽车输出轴铸件的加工工艺，步骤(2)中采用的型砂包括以下重量份数的原料：石英砂80-100份、玻璃纤维10-16份、硅酸钠5-6份、改性淀粉10-12份、硅油4-8份和硅烷偶联剂2-6份。The processing technology of the automobile output shaft casting, the molding sand used in the step (2) comprises the following raw materials by weight: 80-100 parts of quartz sand, 10-16 parts of glass fiber, 5-6 parts of sodium silicate 10-12 parts of modified starch, 4-8 parts of silicone oil and 2-6 parts of silane coupling agent.
所述的一种汽车输出轴铸件的加工工艺，所述改性淀粉是通过以下步骤获得的：将淀粉置于水中，升温至70-75℃，调节pH为5-6，加入α-淀粉酶，反应60-80min；冷却终止反应，在搅拌条件下依次加入磷酸三丁酯、丙烯酸和壳聚糖，反应30-40min后，即可得到改性淀粉。The processing technology of the automobile output shaft casting, wherein the modified starch is obtained by placing the starch in water, heating to 70-75 ° C, adjusting the pH to 5-6, adding α-amylase , the reaction is 60-80 min; the reaction is terminated by cooling, and tributyl phosphate, acrylic acid and chitosan are sequentially added under stirring, and the modified starch is obtained after 30-40 min.
所述的一种汽车输出轴铸件的加工工艺，以淀粉重量份数为100份计，水、磷酸三丁酯、丙烯酸和壳聚糖的重量份数分别为：300-500份、20-30份、40-60份和10-20份。The processing method of the automobile output shaft casting is as follows: the weight fraction of water, tributyl phosphate, acrylic acid and chitosan is 300-500 parts, 20-30, respectively. Parts, 40-60 parts and 10-20 parts.
所述的一种汽车输出轴铸件的加工工艺，所述精炼剂包括以下重量份数的原料：氧化钙30-40份、二氧化硅3-8份、三氧化二铝18-22份、氧化镁8-12份、氟化钡5-10份、四氯化碳10-20份、纳米陶瓷5-10份和碳化钙3-8份。The processing method of the automobile output shaft casting, wherein the refining agent comprises the following raw materials by weight: 30-40 parts of calcium oxide, 3-8 parts of silica, 18-22 parts of aluminum oxide, oxidation 8-12 parts of magnesium, 5-10 parts of cesium fluoride, 10-20 parts of carbon tetrachloride, 5-10 parts of nano ceramics and 3-8 parts of calcium carbide.
所述的一种汽车输出轴铸件的加工工艺，所述精炼剂的加入量为钢水总重量的0.1-0.15％。In the processing technology of the automobile output shaft casting, the refining agent is added in an amount of 0.1-0.15% of the total weight of the molten steel.
本发明所达到的有益效果：The beneficial effects achieved by the invention:
本发明的加工工艺通过采用精炼后的钢水进行浇注，减少了铸件表面的缩孔，提高了铸件的精度，浇注完成后通过热处理提高了铸件的强度，适合用于铸造汽车输出轴。The processing method of the invention is carried out by using molten steel after refining, thereby reducing the shrinkage hole on the surface of the casting, improving the precision of the casting, and improving the strength of the casting by heat treatment after the completion of casting, and is suitable for casting the output shaft of the automobile.
本发明的型砂以石英砂为主要原料，加入玻璃纤维、硅酸钠和改性淀粉，发气量少、且不含氮、磷、硫等有害元素，硬化效果好，通过硅油和硅烷偶联剂改善了石英砂的透气率；制备得到的型砂常温抗弯强度为6-9MPa，灼烧减量为1.4-2.3％，热态抗弯强度为4-6MPa。 透气率为110-128，热湿拉强度为4-6KPa。The molding sand of the invention uses quartz sand as the main raw material, and adds glass fiber, sodium silicate and modified starch, has less gas generation, and does not contain harmful elements such as nitrogen, phosphorus and sulfur, and has good hardening effect, and passes through silicone oil and silane coupling agent. The air permeability of the quartz sand is improved; the prepared bending sand has a bending strength of 6-9 MPa at normal temperature, a burning loss of 1.4-2.3%, and a thermal bending strength of 4-6 MPa. The air permeability is 110-128, and the hot-humid tensile strength is 4-6 KPa.
本发明的精炼剂能够快速熔化，能够细化钢液晶粒，改善钢液质量，提高铸件的致密度，脱硫脱氧效果好，脱硫率为80-85％。The refining agent of the invention can be quickly melted, can refine the steel liquid crystal particles, improve the quality of the molten steel, improve the density of the casting, has good desulfurization and deoxidation effect, and the desulfurization rate is 80-85%.
具体实施方式Detailed ways
下面通过实施例对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The invention is further described below by way of examples. The following examples are only intended to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of the present invention.
实施例1Example 1
一种汽车输出轴铸件的加工工艺，包括以下几个步骤：A machining process for an automobile output shaft casting includes the following steps:
(1)制作模具：根据汽车输出轴的形状制作模具；(1) Making a mold: making a mold according to the shape of the output shaft of the automobile;
(2)型砂造型：将模具放入型砂盒中，得到砂型，将砂型在温度为600-700℃的条件下，烘10-15min，随后降温至350-380℃备用；(2) Type sand molding: the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
(3)熔炼钢水：将钢材置于电炉中熔炼，待温度升至为1600-1700℃，加入精炼剂，精炼15-20min，得到钢水，钢水中含硫量小于0.02％，含磷量小于0.02％，含碳量为0.04-0.06％，含硅量0.2-0.25％，含锰量0.35-0.45％，含镍量0.15-0.25％；所述精炼剂的加入量为钢水总重量的0.1-0.15％。(3) Melting molten steel: the steel is smelted in an electric furnace, and the temperature is raised to 1600-1700 ° C. The refining agent is added and refined for 15-20 min to obtain molten steel. The sulfur content in the molten steel is less than 0.02%, and the phosphorus content is less than 0.02. %, carbon content is 0.04-0.06%, silicon content is 0.2-0.25%, manganese content is 0.35-0.45%, nickel content is 0.15-0.25%; the refining agent is added in an amount of 0.1-0.15 of the total weight of molten steel. %.
(4)浇注：往砂型中浇注钢水，浇注温度为1580-1600℃；浇注完成后进行热处理，热处理具体步骤为：快速降温至300-400℃，保温50-60min，升温至860-900℃，保温50-60min，降温至350-380℃，保温30-40min，再回温至650-680℃，保温50-60min；(4) pouring: pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
(5)冷却：自然冷却后，清理铸件表面，切除浇口、冒口、铲磨毛刺和披缝等凸出物，再次清理残砂，即可得到汽车输出轴铸件。(5) Cooling: After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
其中，步骤(2)中采用的型砂包括以下重量份数的原料：石英砂80份、玻璃纤维16份、硅酸钠5份、改性淀粉12份、硅油4份和硅烷偶联剂6份。Wherein, the molding sand used in the step (2) comprises the following raw materials by weight: 80 parts of quartz sand, 16 parts of glass fiber, 5 parts of sodium silicate, 12 parts of modified starch, 4 parts of silicone oil and 6 parts of silane coupling agent. .
所述改性淀粉是通过以下步骤获得的：将淀粉置于水中，升温至70-75℃，调节pH为5-6，加入α-淀粉酶，反应60-80min；冷却终止 反应，在搅拌条件下依次加入磷酸三丁酯、丙烯酸和壳聚糖，反应30-40min后，即可得到改性淀粉。The modified starch is obtained by placing the starch in water, heating to 70-75 ° C, adjusting the pH to 5-6, adding α-amylase, reacting for 60-80 min; cooling is terminated. In the reaction, tributyl phosphate, acrylic acid and chitosan are sequentially added under stirring, and the modified starch is obtained after reacting for 30-40 minutes.
以淀粉重量份数为100份计，水、磷酸三丁酯、丙烯酸和壳聚糖的重量份数分别为：300份、20份、60份和10份。The parts by weight of water, tributyl phosphate, acrylic acid and chitosan are 300 parts by weight, 20 parts, 60 parts and 10 parts by weight, respectively, based on 100 parts by weight of the starch.
所述精炼剂包括以下重量份数的原料：氧化钙30份、二氧化硅8份、三氧化二铝18份、氧化镁12份、氟化钡5份、四氯化碳10份、纳米陶瓷5份和碳化钙3份。The refining agent comprises the following parts by weight of raw materials: 30 parts of calcium oxide, 8 parts of silica, 18 parts of alumina, 12 parts of magnesium oxide, 5 parts of cesium fluoride, 10 parts of carbon tetrachloride, nano ceramics 5 parts and 3 parts of calcium carbide.
实施例2Example 2
一种汽车输出轴铸件的加工工艺，包括以下几个步骤：A machining process for an automobile output shaft casting includes the following steps:
(1)制作模具：根据汽车输出轴的形状制作模具；(1) Making a mold: making a mold according to the shape of the output shaft of the automobile;
(2)型砂造型：将模具放入型砂盒中，得到砂型，将砂型在温度为600-700℃的条件下，烘10-15min，随后降温至350-380℃备用；(2) Type sand molding: the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
(3)熔炼钢水：将钢材置于电炉中熔炼，待温度升至为1600-1700℃，加入精炼剂，精炼15-20min，得到钢水，钢水中含硫量小于0.02％，含磷量小于0.02％，含碳量为0.04-0.06％，含硅量0.2-0.25％，含锰量0.35-0.45％，含镍量0.15-0.25％；所述精炼剂的加入量为钢水总重量的0.1-0.15％。(3) Melting molten steel: the steel is smelted in an electric furnace, and the temperature is raised to 1600-1700 ° C. The refining agent is added and refined for 15-20 min to obtain molten steel. The sulfur content in the molten steel is less than 0.02%, and the phosphorus content is less than 0.02. %, carbon content is 0.04-0.06%, silicon content is 0.2-0.25%, manganese content is 0.35-0.45%, nickel content is 0.15-0.25%; the refining agent is added in an amount of 0.1-0.15 of the total weight of molten steel. %.
(4)浇注：往砂型中浇注钢水，浇注温度为1580-1600℃；浇注完成后进行热处理，热处理具体步骤为：快速降温至300-400℃，保温50-60min，升温至860-900℃，保温50-60min，降温至350-380℃，保温30-40min，再回温至650-680℃，保温50-60min；(4) pouring: pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
(5)冷却：自然冷却后，清理铸件表面，切除浇口、冒口、铲磨毛刺和披缝等凸出物，再次清理残砂，即可得到汽车输出轴铸件。(5) Cooling: After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
其中，步骤(2)中采用的型砂包括以下重量份数的原料：石英砂100份、玻璃纤维10份、硅酸钠6份、改性淀粉10份、硅油8份和硅烷偶联剂2份。Wherein, the molding sand used in the step (2) comprises the following raw materials by weight: 100 parts of quartz sand, 10 parts of glass fiber, 6 parts of sodium silicate, 10 parts of modified starch, 8 parts of silicone oil and 2 parts of silane coupling agent. .
所述改性淀粉是通过以下步骤获得的：将淀粉置于水中，升温至 70-75℃，调节pH为5-6，加入α-淀粉酶，反应60-80min；冷却终止反应，在搅拌条件下依次加入磷酸三丁酯、丙烯酸和壳聚糖，反应30-40min后，即可得到改性淀粉。The modified starch is obtained by the following steps: placing the starch in water and raising the temperature to 70-75 ° C, adjust the pH of 5-6, add α-amylase, reaction 60-80min; stop the reaction by cooling, add tributyl phosphate, acrylic acid and chitosan under stirring, after 30-40min reaction, The modified starch can be obtained.
以淀粉重量份数为100份计，水、磷酸三丁酯、丙烯酸和壳聚糖的重量份数分别为：500份、30份、40份和20份。The parts by weight of water, tributyl phosphate, acrylic acid and chitosan are 500 parts by weight, 30 parts by weight, 40 parts by weight and 20 parts by weight, respectively, based on 100 parts by weight of the starch.
所述精炼剂包括以下重量份数的原料：氧化钙40份、二氧化硅3份、三氧化二铝22份、氧化镁8份、氟化钡10份、四氯化碳20份、纳米陶瓷5份和碳化钙8份。The refining agent comprises the following parts by weight of raw materials: 40 parts of calcium oxide, 3 parts of silica, 22 parts of alumina, 8 parts of magnesium oxide, 10 parts of cesium fluoride, 20 parts of carbon tetrachloride, nano ceramics 5 parts and 8 parts of calcium carbide.
实施例3Example 3
一种汽车输出轴铸件的加工工艺，包括以下几个步骤：A machining process for an automobile output shaft casting includes the following steps:
(1)制作模具：根据汽车输出轴的形状制作模具；(1) Making a mold: making a mold according to the shape of the output shaft of the automobile;
(2)型砂造型：将模具放入型砂盒中，得到砂型，将砂型在温度为600-700℃的条件下，烘10-15min，随后降温至350-380℃备用；(2) Type sand molding: the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
(3)熔炼钢水：将钢材置于电炉中熔炼，待温度升至为1600-1700℃，加入精炼剂，精炼15-20min，得到钢水，钢水中含硫量小于0.02％，含磷量小于0.02％，含碳量为0.04-0.06％，含硅量0.2-0.25％，含锰量0.35-0.45％，含镍量0.15-0.25％；所述精炼剂的加入量为钢水总重量的0.1-0.15％。(3) Melting molten steel: the steel is smelted in an electric furnace, and the temperature is raised to 1600-1700 ° C. The refining agent is added and refined for 15-20 min to obtain molten steel. The sulfur content in the molten steel is less than 0.02%, and the phosphorus content is less than 0.02. %, carbon content is 0.04-0.06%, silicon content is 0.2-0.25%, manganese content is 0.35-0.45%, nickel content is 0.15-0.25%; the refining agent is added in an amount of 0.1-0.15 of the total weight of molten steel. %.
(4)浇注：往砂型中浇注钢水，浇注温度为1580-1600℃；浇注完成后进行热处理，热处理具体步骤为：快速降温至300-400℃，保温50-60min，升温至860-900℃，保温50-60min，降温至350-380℃，保温30-40min，再回温至650-680℃，保温50-60min；(4) pouring: pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
(5)冷却：自然冷却后，清理铸件表面，切除浇口、冒口、铲磨毛刺和披缝等凸出物，再次清理残砂，即可得到汽车输出轴铸件。(5) Cooling: After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
其中，步骤(2)中采用的型砂包括以下重量份数的原料：石英砂80-100份、玻璃纤维10-16份、硅酸钠5-6份、改性淀粉10-12份、硅油4-8份和硅烷偶联剂2-6份。 Wherein, the molding sand used in the step (2) comprises the following raw materials by weight: 80-100 parts of quartz sand, 10-16 parts of glass fiber, 5-6 parts of sodium silicate, 10-12 parts of modified starch, silicone oil 4 -8 parts and 2-6 parts of a silane coupling agent.
所述改性淀粉是通过以下步骤获得的：将淀粉置于水中，升温至70-75℃，调节pH为5-6，加入α-淀粉酶，反应60-80min；冷却终止反应，在搅拌条件下依次加入磷酸三丁酯、丙烯酸和壳聚糖，反应30-40min后，即可得到改性淀粉。The modified starch is obtained by placing the starch in water, heating to 70-75 ° C, adjusting the pH to 5-6, adding α-amylase, reacting for 60-80 min; cooling to terminate the reaction, under stirring conditions The modified tributyl phosphate, acrylic acid and chitosan are sequentially added, and after 30-40 min, the modified starch is obtained.
以淀粉重量份数为100份计，水、磷酸三丁酯、丙烯酸和壳聚糖的重量份数分别为：300-500份、20-30份、40-60份和10-20份。The parts by weight of water, tributyl phosphate, acrylic acid and chitosan are 300-500 parts, 20-30 parts, 40-60 parts and 10-20 parts, respectively, based on 100 parts by weight of the starch.
所述精炼剂包括以下重量份数的原料：氧化钙30-40份、二氧化硅3-8份、三氧化二铝18-22份、氧化镁8-12份、氟化钡5-10份、四氯化碳10-20份、纳米陶瓷5-10份和碳化钙3-8份。The refining agent comprises the following raw materials by weight: 30-40 parts of calcium oxide, 3-8 parts of silica, 18-22 parts of alumina, 8-12 parts of magnesium oxide, 5-10 parts of barium fluoride 10-20 parts of carbon tetrachloride, 5-10 parts of nano ceramics and 3-8 parts of calcium carbide.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变形，这些改进和变形也应视为本发明的保护范围。 The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention. It should also be considered as the scope of protection of the present invention.

Claims (6)

  1. 一种汽车输出轴铸件的加工工艺，其特征是，包括以下几个步骤：The invention relates to a processing technology for an automobile output shaft casting, which is characterized in that the following steps are included:
    (1)制作模具：根据汽车输出轴的形状制作模具；(1) Making a mold: making a mold according to the shape of the output shaft of the automobile;
    (2)型砂造型：将模具放入型砂盒中，得到砂型，将砂型在温度为600-700℃的条件下，烘10-15min，随后降温至350-380℃备用；(2) Type sand molding: the mold is placed in a sand box to obtain a sand type, and the sand type is baked at a temperature of 600-700 ° C for 10-15 min, and then cooled to 350-380 ° C for use;
    (3)熔炼钢水：将钢材置于电炉中熔炼，待温度升至为1600-1700℃，加入精炼剂，精炼15-20min，得到钢水，钢水中含硫量小于0.02％，含磷量小于0.02％，含碳量为0.04-0.06％，含硅量0.2-0.25％，含锰量0.35-0.45％，含镍量0.15-0.25％；(3) Melting molten steel: the steel is smelted in an electric furnace, and the temperature is raised to 1600-1700 ° C. The refining agent is added and refined for 15-20 min to obtain molten steel. The sulfur content in the molten steel is less than 0.02%, and the phosphorus content is less than 0.02. %, carbon content is 0.04-0.06%, silicon content is 0.2-0.25%, manganese content is 0.35-0.45%, and nickel content is 0.15-0.25%;
    (4)浇注：往砂型中浇注钢水，浇注温度为1580-1600℃；浇注完成后进行热处理，热处理具体步骤为：快速降温至300-400℃，保温50-60min，升温至860-900℃，保温50-60min，降温至350-380℃，保温30-40min，再回温至650-680℃，保温50-60min；(4) pouring: pouring molten steel into the sand type, pouring temperature is 1580-1600 ° C; after pouring, heat treatment, the specific steps of heat treatment are: rapid cooling to 300-400 ° C, holding 50-60 min, heating to 860-900 ° C, Insulation for 50-60min, cooling to 350-380 ° C, holding 30-40min, then returning to 650-680 ° C, holding 50-60min;
    (5)冷却：自然冷却后，清理铸件表面，切除浇口、冒口、铲磨毛刺和披缝等凸出物，再次清理残砂，即可得到汽车输出轴铸件。(5) Cooling: After natural cooling, the surface of the casting is cleaned, and the protrusions such as gates, risers, burrs and creases are removed, and the residual sand is cleaned again to obtain the output shaft of the automobile.
  2. 根据权利要求1所述的一种汽车输出轴铸件的加工工艺，其特征是，步骤(2)中采用的型砂包括以下重量份数的原料：石英砂80-100份、玻璃纤维10-16份、硅酸钠5-6份、改性淀粉10-12份、硅油4-8份和硅烷偶联剂2-6份。A processing method for an automobile output shaft casting according to claim 1, wherein the molding sand used in the step (2) comprises the following parts by weight: 80-100 parts of quartz sand and 10-16 parts of glass fiber. 5-6 parts of sodium silicate, 10-12 parts of modified starch, 4-8 parts of silicone oil and 2-6 parts of silane coupling agent.
  3. 根据权利要求2所述的一种汽车输出轴铸件的加工工艺，其特征是，所述改性淀粉是通过以下步骤获得的：将淀粉置于水中，升温至70-75℃，调节pH为5-6，加入α-淀粉酶，反应60-80min；冷却终止反应，在搅拌条件下依次加入磷酸三丁酯、丙烯酸和壳聚糖，反应30-40min后，即可得到改性淀粉。A processing method for an automobile output shaft casting according to claim 2, wherein the modified starch is obtained by placing the starch in water, raising the temperature to 70-75 ° C, and adjusting the pH to 5 -6, adding α-amylase, the reaction is 60-80 min; the reaction is terminated by cooling, and tributyl phosphate, acrylic acid and chitosan are sequentially added under stirring, and the modified starch is obtained after reacting for 30-40 min.
  4. 根据权利要求3所述的一种汽车输出轴铸件的加工工艺，其特征是，以淀粉重量份数为100份计，水、磷酸三丁酯、丙烯酸和壳聚糖的重量份数分别为：300-500份、20-30份、40-60份和10-20份。 The processing method for an automobile output shaft casting according to claim 3, wherein the parts by weight of water, tributyl phosphate, acrylic acid and chitosan are 100 parts by weight of the starch: 300-500 parts, 20-30 parts, 40-60 parts, and 10-20 parts.
  5. 根据权利要求1所述的一种汽车输出轴铸件的加工工艺，其特征是，所述精炼剂包括以下重量份数的原料：氧化钙30-40份、二氧化硅3-8份、三氧化二铝18-22份、氧化镁8-12份、氟化钡5-10份、四氯化碳10-20份、纳米陶瓷5-10份和碳化钙3-8份。The processing method for an automobile output shaft casting according to claim 1, wherein the refining agent comprises the following raw materials by weight: 30-40 parts of calcium oxide, 3-8 parts of silica, and trioxide 18-22 parts of aluminum, 8-12 parts of magnesium oxide, 5-10 parts of cesium fluoride, 10-20 parts of carbon tetrachloride, 5-10 parts of nano ceramics and 3-8 parts of calcium carbide.
  6. 根据权利要求1所述的一种汽车输出轴铸件的加工工艺，其特征是，所述精炼剂的加入量为钢水总重量的0.1-0.15％。 A processing method for an automobile output shaft casting according to claim 1, wherein said refining agent is added in an amount of from 0.1 to 0.15% by weight based on the total weight of the molten steel.
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JP2004322161A (en) * 2003-04-25 2004-11-18 Ube Machinery Corporation Ltd Method for producing semi-solidified metal of excellent wear resistance
CN104084523A (en) * 2014-06-25 2014-10-08 芜湖国鼎机械制造有限公司 Molding sand and preparation method thereof
CN104959548A (en) * 2015-07-20 2015-10-07 柳州市建西机械铸造厂 Casting method for pressure plate
CN104959521A (en) * 2015-07-02 2015-10-07 无锡阳工机械制造有限公司 Valve casing casting process
CN106513564A (en) * 2016-12-09 2017-03-22 徐玉炜 Bearing cover casting process
CN107716844A (en) * 2017-09-29 2018-02-23 吴江市液铸液压件铸造有限公司 A kind of processing technology of automobile output shaft casting

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004322161A (en) * 2003-04-25 2004-11-18 Ube Machinery Corporation Ltd Method for producing semi-solidified metal of excellent wear resistance
CN104084523A (en) * 2014-06-25 2014-10-08 芜湖国鼎机械制造有限公司 Molding sand and preparation method thereof
CN104959521A (en) * 2015-07-02 2015-10-07 无锡阳工机械制造有限公司 Valve casing casting process
CN104959548A (en) * 2015-07-20 2015-10-07 柳州市建西机械铸造厂 Casting method for pressure plate
CN106513564A (en) * 2016-12-09 2017-03-22 徐玉炜 Bearing cover casting process
CN107716844A (en) * 2017-09-29 2018-02-23 吴江市液铸液压件铸造有限公司 A kind of processing technology of automobile output shaft casting

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