Surface or local gradient reinforced wear resistant manganese steel composite material and preparing process
A composite material, local gradient technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of small increase in hardness, waste of energy, increase in viscosity of molten steel, etc. Contradictions of hardness, saving precious alloy resources, and improving work hardening ability
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[0027] Example 1
[0028] Preparation of locally strengthened hammer head of hammer crusher
[0029] The wear of the hammer head mainly occurs at the end, so the end is locally strengthened. The process steps are as follows:
[0030] 1) Production of cast-infiltrated layer preforms: high-carbon ferrochrome (60% by weight of Cr+6% C+Fe) and ferro-titanium (60% by weight of Ti+40% Fe) are mechanically crushed and taken after screening 100-200 mesh particles, 70% ferro-titanium + 30% carbon-chromium ferro-chromium are uniformly mixed by weight, and a small amount of borax and phenolic resin are added to make a prefabricated block with a thickness of 10mm. The size is equivalent to the size of the end of the hammer. It is placed in water glass quartz At the end of the cavity of the sand casting mold, there are many pores in the mold to strengthen the exhaust;
[0031] 2) Melting and pouring: Use scrap steel, ferromanganese, pig iron, etc. to prepare a charge with a carbon content of 0...
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[0041] Example 2
[0042] Preparation of the plate hammer for strengthening the surface of the impact crusher
[0043] The wear of the blow bar mainly occurs on the bottom surface, so the bottom layer is strengthened by the surface layer. The raw materials used are the same as in Example 1. The cast-infiltrated layer is still composed of 70% ferro-titanium + 30% carbon ferrochromium, with a crushing particle size of about 60-200 mesh. It is molded with water glass quartz sand, and the bottom of the mold is connected to the vacuum exhaust box. After the core is removed, the mixed powder dried at 120°C is evenly and loosely laid on the bottom of the cavity with a thickness of about 10mm. The induction furnace is still used for smelting without oxidation. The weight percentages of the design components are: 1% C, 9% Mn, and the pouring temperature is 1580-1600°C. Using in-situ reactive vacuum casting and infiltration synthetic pouring method, the vacuum degree is about 0.02~0.05MPa. ...
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