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Preparation process of bar for large-size hot extrusion of EMS1 martensitic gas valve steel

A preparation process and technology of valve steel, which is applied in the field of metal processing, can solve the problems of inability to automatically rotate materials, low precision of straightening machines, and increased labor costs, so as to improve shape and distribution, save energy and improve production efficiency effect

Pending Publication Date: 2021-08-10
JIANGSU SHENYUAN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of bar processing, the straightening accuracy of the straightening machine is low, and at the same time, the material cannot be automatically rotated. When it is necessary to change the surface and straighten, manual operation is still required, which is time-consuming and laborious, which reduces work efficiency and increases labor costs. cost, resulting in waste of resources

Method used

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  • Preparation process of bar for large-size hot extrusion of EMS1 martensitic gas valve steel
  • Preparation process of bar for large-size hot extrusion of EMS1 martensitic gas valve steel
  • Preparation process of bar for large-size hot extrusion of EMS1 martensitic gas valve steel

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Embodiment 1

[0038] The invention provides a technical solution: a preparation process of a bar for large-scale hot extrusion of EMS1 martensitic valve steel. The bar is composed of the following parts by weight: scrap steel 100-150 parts, high-carbon ferrochrome 60- 90 parts, 50-80 parts of lime coating solution, 10-15 parts of carbon powder and 10-15 parts of ferrosilicon powder, the specific steps of its preparation process are as follows:

[0039] Step 1: Add 100-150 parts of scrap steel and 60-90 parts of high-carbon ferrochrome in the electric arc furnace, and then carry out the melting of the alloy for primary refining to form molten steel;

[0040] Step 2: Put the molten steel into the ladle refining furnace, adjust the alloy composition, and add 10-15 parts of carbon powder and 10-15 parts of ferrosilicon powder in batches successively, heat up and refine, deoxidize, and then take samples for analysis. When each alloy composition reaches National standard requirements, when the te...

Embodiment 2

[0053] see figure 1 and figure 2 In this embodiment, the straightening machine 1 includes a housing 17, the inner side wall of the housing 17 is fixedly connected with a joint block 2, and the other end of the joint block 2 is respectively fixed with a fixed sleeve 3 and a fixed sleeve 2 4, and the fixed sleeve A moving sleeve 5 is slidingly sleeved between the first 3 and the fixed sleeve two 4, and a chute is provided on the side wall of the fixed sleeve one 3, and an electric push rod one 6 is installed on the side wall of the fixed sleeve two 4, and the electric push rod one 6 is installed on the side wall of the fixed sleeve two 4. The other end of rod one 6 is fixedly connected with connecting rod 7, and the other end of connecting rod 7 extends in the fixed cover one 3, and the extension end of connecting rod 7 is affixed with the side wall of moving cover 5; An electric push rod two 8 is installed on the top, and the other end of the electric push rod two 8 is fixedl...

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Abstract

The invention discloses a preparation process of a bar for large-size hot extrusion of EMS1 martensitic gas valve steel, and belongs to the technical field of metal processing. The bar is prepared from the following components in parts by weight: 100 to 150 parts of scrap steel, 60 to 90 parts of high-carbon ferrochrome, 50 to 80 parts of lime coating solution, 10 to 15 parts of carbon powder and 10 to 15 parts of ferrosilicon powder. According to the preparation process of the bar for large-size hot extrusion of the EMS1 martensitic gas valve steel provided by the invention, automatic face changing and straightening can be achieved, manual operation is not needed, time and labor are saved, the working efficiency is improved, the resource waste is reduced, meanwhile, various segregation and looseness defects in a blank are reduced, the structure of the original blank is effectively refined, the energy consumption is saved, and the production cost is reduced; and a coil rod is ground, and the pollution of a pickling solution and the like is avoided, so that the purposes of reducing the cost and improving the efficiency are achieved, meanwhile, the labor condition is improved, the labor intensity of workers is relieved, Ni can be saved by 9 percent, and the cost of alloy products is reduced.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a preparation process for large-scale hot extrusion rods of EMS1 martensitic valve steel. Background technique [0002] EMS1 martensitic valve steel, corresponding to the Japanese brand SUH1, is used in the valve of internal combustion engines, and is mainly used as intake valve material. This material has high carbon content, and contains chromium and silicon at the same time. The wear-resistant and corrosion-resistant effects of EMS1 martensitic valve steel have now been localized. When EMS1 martensitic valve steel is used for hot-extruded bars and provided to customers, it needs to be straightened, so it needs straightening machines. participate. [0003] In the process of bar processing, the straightening accuracy of the straightening machine is low, and at the same time, the material cannot be automatically rotated. When it is necessary to change the surface and st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/06C22C33/06C21C7/06C21C7/10B22D11/115C22B9/18B22D7/00C21D1/26B21B1/16B21B15/00
CPCC21D8/065C22C33/06C21C7/06C21C7/10B22D11/115C22B9/18B22D7/00C21D1/26B21B1/16B21B15/00C21D2211/008B21B2015/0064Y02P10/20
Inventor 艾进杨富有黄鑫丁兴明
Owner JIANGSU SHENYUAN SPECIAL STEEL
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