鉻礦砂Cr Sand AFS 45-55 鑄鋼件面砂
鉻礦砂Cr Sand AFS 45-55 鑄鋼件面砂是一種非硅質(zhì)的鑄造面砂和型砂。鉻礦砂AFS 45-55的主要成分是天然的鉻鐵礦，伴生有氧化鐵和氧化鋁。經(jīng)過水洗和四遍磁選后，鉻礦砂廠家會控制二氧化硅和泥沙含量，使之更適用于鑄造領(lǐng)域。鑄造用的鉻砂具有燒結(jié)溫度高、防止化學(xué)滲透、熱傳導(dǎo)性能優(yōu)異、遇熱膨脹小的特點。鉻礦砂AFS 45/55(50-100#)主要用于大型厚壁鑄件的面層砂、鑄件易粘砂部分的芯砂、澆注溫度高的鑄鋼件合金鑄鋼件的型砂等方面。
Cr Sand AFS 45-55 is a non siliceous casting surface sand and molding sand. The main component of chromite sand AFS 45-55 is natural chromite, accompanied by iron oxide and aluminum oxide. After water washing and four rounds of magnetic separation, the chrome ore sand manufacturer will control the content of silicon dioxide and sediment to make it more suitable for the casting field. Chromium sand used in casting has the characteristics of high sintering temperature, prevention of chemical penetration, excellent thermal conductivity, and small thermal expansion when encountering heat. Chromite sand AFS 45/55 (50-100 #) is mainly used for surface sand of large thick wall castings, core sand of easily sticky sand parts of castings, and alloy steel castings with high pouring temperature. In terms of molding sand and other aspects of the product.
鉻礦砂AFS 45-55(Chrome ore sand AFS 45/55)的性能特點
- 高熔點,燒結(jié)溫度高
- 優(yōu)異的熱穩(wěn)定性
- 高密度，比重大?
- 中等莫氏硬度5.5
- 熱傳導(dǎo)能力強(qiáng)
- 熱膨脹系數(shù)低
The characteristics of Cr sand AFS 45/55:
1. High melting point, high sintering temperature2. Excellent thermal stability
3. High density, high density -
4. Medium Mohs hardness 5.5
5. Strong thermal conductivity
6. Low coefficient of thermal expansion
鉻礦砂AFS 45-55(Chrome ore sand AFS 45/55)的技術(shù)參數(shù)：
- 化學(xué)成分
| Cr2O3 （三氧化二鉻） | ≥ 46% |
| SiO2（二氧化硅） | ≤ 1.0% |
| FeO（氧化鐵） | ≤ 26.5% |
| Cr：Fe （鉻鐵比） | ≥1.5：1 |
| MgO（氧化鎂） | ≤ 10% |
| CaO（氧化鈣） | ≤ 0.3% |
| Al2O3（三氧化二鋁） | ≤ 15.5% |
| P（磷） | ≤30 ppm |
| S（硫） | ≤30 ppm |
| Cr/Fe（鉻鐵比） | ≥ 1.55：1 |
2.物理性能：
| 莫氏硬度（Mohs Hardness） | 5.5-6 |
| 熔點（Melting Point） | 2180 ℃ |
| 燒結(jié)溫度（Sintering Point） | ＞1800℃ |
| 比重（Specific Gravity） | 4.0-4.8 g/cm3 |
| 堆積密度 (Bulk Density LPD) | 2.5-3 g/cm3 |
| 顏色（Color） | 黑色（Black） |
| PH值（PH Value） | 7-9 |
| 導(dǎo)熱系數(shù)（Thermal conductivity） | 0.63 W/M·K |
| 熱膨脹率（Thermal Expansion Rate）（1000℃） | 0.6% |
| 酸耗值（Acid Demand Value ADV） | ≤ 5ML |
| 渾濁度（turbidity）(JTU) | ≤ 110 |
| 含泥量（Soil content） | ≤ 0.1% |
| 含水量（Moisture） | ≤ 0.1% |
鉻礦砂AFS 45-55(Chrome ore sand AFS 45/55)的粒度分布如下：
| 目數(shù) | 篩上占比 |
| +40mesh(425um) | 2.40% |
| +50mesh(300um) | 36.80% |
| +70mesh(212um) | 41.70% |
| +100mesh(150um) | 13.70% |
| +140mesh(106um) | 3.20% |
| 細(xì)度 | AFS 50.184 |
鉻礦砂Chrome ore sand的其他型號：
國內(nèi)常規(guī)粒度：10-20目 20-40目，20-60目，30-70目，40-70目，50-100目、70-140目，140-270目 0-1mm 200目，325目,400目，70#-0出口常規(guī)粒度：AFS 25-35 AFS 25-30 AFS 30-35 AFS 35-40 AFS 40-45 AFS 45-50 AFS 40-50 AFS 50-55 AFS 55-60 AFS 60-65 0-1mm 200# 325#,400#
各粒度對應(yīng)顆粒尺寸表:
鉻礦砂AFS 45-55(Chrome ore sand AFS 45/55)的應(yīng)用范圍：
1. 大型厚壁型鑄件鑄造：鉻礦砂配合砂型鑄造、呋喃樹脂自硬砂、水玻璃自硬砂等工藝，用于體積重量大的鑄鐵件和鑄鋼件，可以使鑄件按既定的順序進(jìn)行冷卻，有利于提高鑄件內(nèi)部的緊密度，增強(qiáng)鑄件的強(qiáng)度。此外，對于使用硅砂的工藝，可在容易出現(xiàn)氣孔、脈紋的關(guān)鍵部位，使用鉻礦砂作為面砂代替硅砂，可以有效防止裂紋、氣孔等鑄造缺陷。2. 消失模鑄造。在消失模鑄造中，選用鉻礦砂，可以防止石英砂鑄造造成的夾砂、粘砂等缺陷。用于制造高鉻鑄鋼、高錳鋼材質(zhì)的閥門、葉輪等鑄件。
3. 殼型鑄造：鉻礦砂可用于殼型鑄造中復(fù)雜部件的芯砂材料，制作砂芯。用于生產(chǎn)高精度、表面光滑的304，316不銹鋼鑄件和碳鋼精密鑄件等，可以有效防止鑄件內(nèi)腔的粘砂問題。
4. 砂型鑄造：鉻砂還可以用于砂型鑄造，如型砂鑄造、水玻璃自硬砂砂型鑄造等，用于生產(chǎn)各種大中小型零件，如泵體、管道、閥門等。
1. Large scale thick walled casting: Chromite sand combined with sand casting, furan resin self hardening sand, water glass self hardening sand and other processes are used for large volume and weight cast iron and steel castings. It can cool the castings in a predetermined order, which is conducive to improving the internal tightness of the castings and enhancing their strength. In addition, for the process of using silica sand, chrome ore sand can be used as surface sand instead of silica sand in key areas where porosity and veins are prone to occur, which can effectively prevent casting defects such as cracks and porosity.
2. Lost foam casting. In lost foam casting, using chrome sand can prevent defects such as sand inclusion and sticking caused by quartz sand casting. Used for manufacturing castings such as valves and impellers made of high chromium cast steel and high manganese steel materials.
3. Shell casting: Chromite sand can be used as a core sand material for complex components in shell casting, making sand cores. Used for producing high-precision, smooth surface 304316 stainless steel castings and carbon steel precision castings. It can effectively prevent the problem of sand sticking in the inner cavity of castings.
4. Sand casting: Chromite sand can also be used for sand casting, such as sand casting, water glass self hardening sand casting, etc., to produce various large, medium, and small parts, such as pump bodies, pipelines, valves, etc.
鉻礦砂AFS 45-55(Chrome ore sand AFS 45/55)的生產(chǎn)和包裝：
