Manufacturing process of tin-phosphor bronze stretching rod

Abstract

The invention relates to a manufacturing process of a tin-phosphor bronze stretching rod. The manufacturing process flow with the product specification of phi 15-phi 38 mm comprises the following steps of: carrying fusion casting; sawing a cast ingot; carrying out diplopore extrusion by using a 4000-ton oil press; sawing; pickling; stretching; carrying out intermediate annealing; finishing; annealing a finished product; and packaging. The manufacturing process disclosed by the invention can carry out the fusion casting on an ingot blank by using a cored or coreless line-frequency furnace, carry out the diplopore extrusion by using the 4000-ton oil press, carry out gate stretching on a rod blank subjected to the diplopore extrusion by adopting a chain stretcher and carry out stress-relief annealing on the rod by adopting a resistor annealing furnace, thereby greatly improving the production efficiency, meeting the requirement of a customer, simplifying the technical treatment process, cancelling the heading mode of a burning head furnace, reducing the energy consumption, further reducing the production cost, realizing the short-flow operation, shortening the production period, improving the integrated finished product ratio, improving the production efficiency, enlarging the product range, reducing the energy consumption and realizing the industrialized production.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal material processing, in particular to a tin phosphor bronze drawing bar manufacturing process. [0002] Background technique [0003] Tin phosphor bronze is corrosion-resistant, wear-resistant, has good mechanical and technological properties, and is widely used as an elastic material. At present, the tin phosphor bronze drawn rods produced by our company, including LC5211, C51000, QSn7-0.2, QSn6.5-0.1, etc., are mostly small and medium-sized, with long production cycle, high scrap rate, low yield rate for a long time, and Production needs to span multiple workshops, and customers react strongly to lead time delays. Taking the main product specification φ37 as an example, the minimum extruded billet of 4000 tons hydraulic press is φ55 mm, and the process flow is: melting and casting → ingot casting 245×200~500 → ingot sawing → 4000 tons extrusion → sawing → pickling → φ55 overburni...

AI Technical Summary

Problems solved by technology

Taking the main product specification φ37 as an example, the minimum extruded billet of 4000 tons hydraulic press is φ55 mm, and the process flow is: melting and casting → ingot casting 245×200~500 → ingot sawing → 4000 tons extrusion → sawing → pickling → φ55 overburning Head furnace making head→stretching→straightening→intermediate annealing→stretching-finished product annealing, using this process, the processing process is too long, and intermediate annealing is required, not only the energy consumption remains high, but also cracks often occur after annealing, resulting in batches Scrap, very low yield

[0004] Due to the long process and high production cost, the production of specifications below φ20 has been discontinued at present, and the φ55 extrusion can only use the burner furnace as the head. The production process is too long, the production cost remains high, and the production efficiency is low, so that the delivery Long cycle, difficult to meet market demand