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复合材质铸钢件就是在型壁上涂覆合金膏剂直接铸造成以铸钢为主体,在其表面复盖合金层的双金属铸件。铸钢主体具有足够的强度和韧性,合金层根据使用要求可以具有耐磨性、耐蚀性、耐热性,或兼而有之。该铸件制造工艺简便性能优越,可以经济合理地使用合金元素,为提高铸钢件的耐磨性、耐蚀性及耐热性开创了一条新的途经。在40毫米的板状试件上可以获得合金层最大厚度为15毫米左右。耐磨合金层的最高硬度(HRC)可达72左右,抗磨粒磨损性能比铸钢母材提高了1～11倍。本文系统地介绍了工艺因素对合金层厚度和结合质量的影响,并推荐了二十余种耐磨、耐蚀和耐热合金层的成份,组织和性能。
Composite material steel casting is coated on the wall of the type of alloy paste cast directly into a cast steel as the main body, covered in its surface layer of bimetallic alloy castings. Cast steel body has sufficient strength and toughness, alloy layer according to the requirements of use can have wear resistance, corrosion resistance, heat resistance, or both. The casting manufacturing process has the advantages of simple and superior performance, can use alloying elements economically and reasonably, and opens up a new way for improving the wear resistance, corrosion resistance and heat resistance of steel castings. The maximum thickness of the alloy layer is about 15 mm on a plate specimen of 40 mm. Wear-resistant alloy layer of the highest hardness (HRC) of up to about 72, anti-abrasive wear performance than the cast base metal increased by 1 to 11 times. This paper systematically introduces the influence of process factors on the thickness and bonding quality of the alloy layer, and recommends the composition, organization and properties of more than twenty wear-resistant, corrosion-resistant and heat-resistant alloy layers.