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Glass bottle mold annealing method based on vermicular graphite cast iron
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A technology of vermicular graphite cast iron and glass bottles, which is applied in the field of thermal processing of metal materials, can solve the problems of short service life, low service life, easy formation of slag inclusions, etc., and achieve the effect of reducing the internal gravity of the blank
Inactive Publication Date: 2018-01-09
CHANGSHU YULONG GLASS MOLD
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Abstract
Description
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Problems solved by technology
At present, most of the glass bottle molds used in China are made of low-alloy gray cast iron. The molds of this material generally have poor wear resistance, easy oxidation, and deformation, which makes the molds unusable and short in service life. Only two to three hundred thousand can be produced. glass bottle
At present, vermicular graphite cast iron such as low-silicon aluminum series has been used as glass mold material, but this material is easy to form slag inclusions, inconvenient process operation, and easy to form casting defects; and it is easy to cause insufficient fatigue strength under rapid cooling and rapid heating conditions. damage, poor service life, etc.
Method used
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Embodiment 1
[0014] The present embodiment provides a kind of glass bottle mold annealing method based on vermicular graphite cast iron, and it comprises the following steps:
[0015] (a) The glass bottle mold blank cast by vermicular graphite cast iron (obtained by casting molten iron with the following mass content: C: 3.5%, Si: 2.8%, Mn: 0.3%, Mo: 0.3%, V: 0.12%, Ti : 0.08%, the rest is Fe and other unavoidable impurities) cooled to 100 ℃, put into the annealing furnace;
[0016] (b) Raise the temperature to 900°C at a rate of 30°C / h and keep it warm for 5 hours;
[0017] (c) Cool the glass bottle mold blank processed in step (b) to 300° C. in the furnace, take it out of the furnace, and cool it to room temperature.
Embodiment 2
[0019] The present embodiment provides a kind of glass bottle mold annealing method based on vermicular graphite cast iron, and it comprises the following steps:
[0020] (a) The glass bottle mold blank cast by vermicular graphite cast iron (obtained by casting molten iron with the following mass content: C: 3.5%, Si: 2.8%, Mn: 0.3%, Mo: 0.3%, V: 0.12%, Ti : 0.08%, the rest is Fe and other unavoidable impurities) cooled to 150 ℃, put into the annealing furnace;
[0021] (b) Raise the temperature to 950°C at a rate of 50°C / h and keep it warm for 3 hours;
[0022] (c) Cool the glass bottle mold blank treated in step (b) to 350° C. in the furnace, take it out of the furnace, and cool it to room temperature.
Embodiment 3
[0024] The present embodiment provides a kind of glass bottle mold annealing method based on vermicular graphite cast iron, and it comprises the following steps:
[0025] (a) The glass bottle mold blank cast by vermicular graphite cast iron (obtained by casting molten iron with the following mass content: C: 3.5%, Si: 2.8%, Mn: 0.3%, Mo: 0.3%, V: 0.12%, Ti : 0.08%, the rest is Fe and other unavoidable impurities) cooled to 120 ℃, put into the annealing furnace;
[0026] (b) Raise the temperature to 920°C at a rate of 40°C / h and keep it warm for 4 hours;
[0027] (c) Cool the glass bottle mold blank treated in step (b) to 320° C. in the furnace, take it out of the furnace, and cool it to room temperature.
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PUM
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Abstract
The invention relates to a glass bottle mold annealing method based on vermicular graphitecast iron. The glass bottle mold annealing method comprises the following steps that (a), a glass bottle moldblank cast by adopting the vermicular graphitecast iron is cooled to below 200 DEG C, and stored in an annealing furnace; (b), the temperature of the glass bottle mold blank rises to 900-950 DEG C at a speed of 30-50 DEG C / h, and heat preservation is conducted for 3-5 hours; and (c) the temperature of the glass bottle mold blank processed in the step (b) decreases to 300-350 DEG C in a furnace cooling mode, and then the glass bottle mold blank is taken out from the furnace and cooled to be at the room temperature. By adopting a specific heatprocessing technology, the glass bottle mold blankcan generate a ferritic matrix with the volume fraction being above 85% or eliminate free cementite on the thin wall, thus the inner gravitation of the blank is reduced, and heat deformation of the mold is prevented and the machining property is improved.
Description
technical field [0001] The invention belongs to the field of thermal processing of metal materials, and in particular relates to an annealing method for a glass bottle mold based on vermicular graphitecast iron. Background technique [0002] The quality of glass bottles is closely related to the quality of the molds used. Practice has proved that only good bottle-making machines without good molds cannot produce good bottles and cans. Only by continuously improving the quality of molds can the quality of glass products be improved. and productivity. At present, most of the glass bottle molds used in China are made of low-alloy gray cast iron. The molds of this material generally have poor wear resistance, easy oxidation, and deformation, which makes the molds unusable and short in service life. Only two to three hundred thousand can be produced. Only glass bottles. At present, vermicular graphite cast iron such as low-silicon aluminum series has been used as glass mold ma...
Claims
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Application Information
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