混砂机刮板为易磨损件,需经常更换。近年来,我们在刮板的刀口表面处放置成形外冷铁,湿型整铸,生产出的刮板每块可用4～5个月。而且它的制造周期短、成本低。其铸造工艺见图1。这种刮板因为只在刀口面局部被冷铁激冷成白口,其它部分仍为灰口,不影响钻孔等加工,且无脆性,不易断裂。铁水碳当量CE=C+1/3(Si+P)<3.8％。炉前三角试块白口宽度应大于2毫米。试 Mixer scraper for easy wear parts, need to be replaced frequently. In recent years, we place the outer cold iron and wet castings on the blade surface of the scraper to produce 4 to 5 months for each scraper. And its short manufacturing cycle and low cost. The casting process shown in Figure 1. This scraper is cold chilled to white only on the edge of the blade, while the rest of the blade is still gray, which does not affect the processing of drilling holes, etc., and has no brittleness and is not easily broken. Hot metal carbon equivalent CE = C + 1/3 (Si + P) <3.8%. Pre-furnace triangle white breadth should be greater than 2 mm. test