国产精品久久久久久爽爽爽,变态拳头交视频一区二区,国产高清在线精品一区二区三区,国产福利一区二区三区在线视频 ,国产极品久久久久久久久

鑄造涂料

石墨乳的主要成分是石墨（微粉石墨）黑灰色；有油膩感，可污染紙張。硬度為1～2，沿垂直方向隨雜質(zhì)的增加其硬度可增至3～5。比重為1．9～2．3。在隔絕氧氣條件下，其熔點(diǎn)在3000℃以上，是*耐溫的礦物之一。常溫下石墨粉的化學(xué)性質(zhì)比較穩(wěn)定，不溶于水、稀酸、稀堿和有機(jī)溶劑。
，鑄造涂料是鑄造過(guò)程中覆蓋在型芯表面以改善其表面耐火性，化學(xué)穩(wěn)定性，抗金屬液沖刷性，抗粘砂性等性能的鑄造輔助材料；鑄造涂料可制成漿狀，膏狀或粉狀，用噴，刷，侵，流等方法涂敷在型芯表面。能延長(zhǎng)模具的使用壽命1-3倍．具有良好的潤(rùn)滑性、脫模性、化學(xué)穩(wěn)定性、高溫附著性、提高模具使用壽命和鍛件質(zhì)量。不污染環(huán)境，使用方便。
The main component of graphite emulsion is graphite (micro-powder graphite) black-gray; it has greasy feeling and can pollute paper. The hardness is 1-2, and increases to 3-5 along the vertical direction with the increase of impurities. The specific gravity is 1.9-2.3. Under the condition of oxygen isolation, its melting point is above 3000 C, which is one of the most temperature-resistant minerals. At room temperature, the chemical properties of graphite powder are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents.
Foundry coating is a casting auxiliary material covering the core surface in the process of casting to improve its fire resistance, chemical stability, anti-metal liquid scouring and anti-sticking properties. Foundry coating can be made into slurry, paste or powder, which can be applied on the core surface by spraying, brushing, invasion, flow and other methods. It can prolong the service life of the die by 1-3 times. It has good lubricity, demoulding, chemical stability, high temperature adhesion, improving the service life of the die and the quality of forgings. It does not pollute the environment and is easy to use.