A high-strength precipitation-hardening stainless steel for laminates and its manufacturing method

A technology of precipitation hardening and manufacturing method, applied in the field of high-strength precipitation hardening stainless steel and its manufacturing, which can solve the problems of reduced polishing performance, brittleness and hardness, poor polishing performance, etc.

Active Publication Date: 2022-03-25
浙江吉森金属科技有限公司
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] None of the above-mentioned existing patents can fundamentally solve the problem of poor plate shape caused by phase transformation and poor polishability caused by the precipitation of large second phases such as ε-Cu in the production process of martensitic precipitation hardening stainless steel
In addition, the above-mentioned patent contains one or both of Ti and Nb elements. Ti or Nb is very easy to form composite precipitates (Ti, Nb) (C, N) with C and N in steel. These precipitates are brittle and hard. , reducing polishing performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A high-strength precipitation-hardening stainless steel for laminates and its manufacturing method
  • A high-strength precipitation-hardening stainless steel for laminates and its manufacturing method
  • A high-strength precipitation-hardening stainless steel for laminates and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Cast the smelted molten steel that meets the above composition requirements into a continuous casting slab, and the chemical composition of the slab is shown in Table 1. After hot rolling, solution heat treatment at 1050 °C for 10 minutes, water cooling to 30 °C, pickling, easy and good control of the plate shape. The cold rolling reduction is 55% cold rolling, the heat treatment process is adjusted to 730 ° C for 1 hour, the cryogenic treatment process is -73 ° C for 2 hours, and finally the aging treatment is performed at 470 ° C for 4 hours, and the air is cooled to 30 ° C. This example Microstructure photos see figure 2 , the structure is martensite and precipitated Mo and Cr carbonitride precipitation strengthening phase, the precipitation phase is fine and uniform, and the yield strength and tensile strength are respectively 1450MPa and 1500MPa. The stainless steel for laminates is obtained.

Embodiment 2

[0059] Example 2: Cast the smelted molten steel that meets the above composition requirements into a continuous casting slab, and the chemical composition of the slab is shown in Table 1. After hot rolling, carry out solution heat treatment at 1100°C for 10 minutes, water-cooled to 60°C, pickled, the shape is good, cold rolling reduction is 80% cold rolling, the adjustment treatment process is 760°C for 3 hours, and the cryogenic treatment process is -80°C for 4 hours, and finally, aging treatment at 480°C for 3 hours, and air-cooled to 20°C. The stainless steel for laminates with yield strength and tensile strength of 1435 MPa and 1508 MPa, respectively, can be obtained.

Embodiment 3

[0060] Example 3: Cast the smelted molten steel meeting the above composition requirements into a continuous casting slab, and the chemical composition of the slab is shown in Table 1. After hot rolling, carry out solution heat treatment at 1080 °C for 3 minutes, water-cooled to 80 °C, pickling, the shape of the plate is good, cold rolling reduction is 60% cold rolling, the adjustment treatment process is 730 °C for 2 hours, and the cryogenic treatment process is -115°C for 3 hours, and finally an aging treatment at 500°C for 2 hours, and air-cooled to 25°C. The stainless steel for laminates with yield strength and tensile strength of 1465 MPa and 1510 MPa, respectively, can be obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

A high-strength precipitation-hardening stainless steel for laminates and a manufacturing method thereof. The chemical composition weight percentage of the steel is: C: 0.07-0.10%, Si: 0.5-0.8%, Mn: 0.6-1.0%, Cr: 16.0- 17.0%, Ni: 4.0~4.5%, N: 0.07~0.10%, Mo: 2.0~2.5%, P≤0.040%, S≤0.005%, the rest are Fe and unavoidable impurities, and at the same time need to meet: -110 ≤1180‑57×Ni(%)‑37×Cr(%)‑30×Si(%)‑30×Mn(%)‑1950×C(%)‑1950×N(%)‑22×Mo(% )≤10. The structure of the steel of the present invention after solution heat treatment is metastable austenite, and the structure obtained after cold rolling, adjustment heat treatment, cryogenic treatment and aging treatment is martensite and carbonitride precipitation strengthening phase, the steel The yield strength and tensile strength are both above 1400MPa, which meets the strength requirements of laminates; it does not contain elements such as Cu, Nb and Ti, and does not contain large particle precipitates in the structure, which significantly improves the polishability of laminates.

Description

technical field [0001] The invention belongs to the field of stainless steel for laminates used in the printed circuit board industry, and particularly relates to a high-strength precipitation hardening stainless steel for laminates and a manufacturing method thereof. Background technique [0002] Laminate is a key workpiece in the production process of Printed Circuit Board (PCB for short), and its flatness and polishing have a great influence on the quality of the printed circuit board. At present, the raw material of the laminate is martensitic precipitation hardening stainless steel PH17-4. After aging treatment, the precipitation hardening phase precipitates, which can make the yield strength and tensile strength reach more than 1400MPa, which meets the high strength requirements of the laminate. PH17-4 stainless steel is prone to large waves due to the phase change during the solution treatment process, and a strong straightening machine is required to meet the require...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/04C22C38/02C22C33/04C21D8/02C21D6/04
CPCC22C38/44C22C38/04C22C38/02C22C38/002C22C38/001C22C33/04C21D8/0205C21D8/0226C21D8/0236C21D6/004C21D6/005C21D6/008C21D6/04
Inventor 贾楠
Owner 浙江吉森金属科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap