Manufacturing process of durable diesel engine block

Abstract

The invention relates to a manufacturing process of a durable diesel engine block. The manufacturing process comprises the steps: preparing ingredients according to a formula, and mixing and smeltingraw materials; bottoming up the smelted raw materials; adding the retaining slag conglomeration agent into smelting liquid after being smelted for removing slag, and adding the retaining inoculant formetal-stream inoculation in an inrushing process; and conducting pouring, and thus obtaining a single-cylinder diesel engine block. The single-cylinder diesel engine block has the characteristics ofsmall tendency of shrinkage porosity and long service life. The invention also provides a preparation method of the single-cylinder diesel engine block, and the process is reasonable.

Description

technical field [0001] The invention relates to a durable diesel engine body manufacturing process, in particular to a durable diesel engine body manufacturing process. Background technique [0002] In the prior art, high-strength gray cast iron is mostly used for casting single-cylinder diesel engine bodies, such as gray cast iron HT200, gray cast iron HT250, gray cast iron HT300, etc. In actual use, the single-cylinder diesel engine body made of gray iron often has thermal fatigue cracks, which is determined by the characteristics of gray cast iron. Since the elongation of gray iron is almost zero, the thermal shock resistance is poor. The tensile strength of vermicular graphite cast iron is higher than that of general high-strength gray cast iron, it has a certain elongation, and its fatigue resistance is better than that of general high-strength gray cast iron. However, due to the difficulty in the casting production of compacted graphite cast iron, although some foundr...

AI Technical Summary

Problems solved by technology

However, due to the difficulty in the casting production of compacted graphite cast iron, although some foundry manufacturers produce compacted graphite cast iron, it is difficult to stably obtain compacted graphite cast iron with high creeping rate