Casting process of North American standard self-protection type high manganese steel frog

Abstract

The invention relates to a casting process of a North American standard self-protection type high manganese steel frog. The casting process is characterized by comprising the following processes including a process of an opening position of the toe end of the frog: arranging a riser pad in the opening position of the toe end, wherein the inclination is designed according to an inverse draft of 1:(10 to 30), cooperatively using an insulating riser, adopting a chilling process that bright cold iron is matched with chromite sand, and chilling through molten steel; a process of a connecting position of a point rail of the frog and a filler of the heel end: implanting special forming bright cold iron in the position, wherein the structure of the cold iron is completely and tightly pasted with the structure of a casting; and a process of an opening position of a guardrail of the frog: arranging riser pads on two diagonal points of the central position of the structure, wherein the inclination of both sides of the pads is designed according to positive drafts of 1:5 and 1:20, and designing a heating insulating riser. According to the self-protection type high manganese steel frog manufactured by adopting the novel process, on one hand, the internal quality of the North American self-protection type high manganese steel frog casting can satisfy the standard requirements, on the other hand, the casting defects of air holes, slag inclusion, shrinkage cavities and the like which lead to waste of existing North American self-protection type high manganese steel frog castings can be overcome, and the qualified rate of the frog castings is increased from about 30% to 75% or over.

Description

technical field [0001] The invention relates to a novel high manganese steel frog manufacturing process, in particular to a North American standard self-protecting high manganese steel frog casting process. Background technique [0002] my country has more than 40 years of experience in producing high manganese steel frogs. An average of more than 1,200 frogs are produced per month, and the annual output reaches 15,000 high manganese steel frogs. Products are exported to North America, South Korea, Indonesia, Saudi Arabia, Egypt, Turkey, Hong Kong and other countries and regions in the world, and more than ten standards are implemented. At present, North American self-protecting high manganese steel frogs are one of the most important products in the North American market, and their internal quality level (mainly reflected by X-ray film results) is not stable enough and is at a low quality level. According to statistics, the pass rate of primary flaw detection in 2014 was ...

AI Technical Summary

Problems solved by technology

At present, as one of the most important products in the North American market, self-protecting high-manganese steel frogs in North America, its internal quality level (mainly reflected by X-ray film results) is not stable enough and is at a low quality level

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